42 results about "Thioglycolic acid" patented technology

A depilatory composition comprising: (a) a synthetic oil; (b) a source of alkalinity; (c) a depilatory agent; (d) water; and (e) a C8-20 alkyl hydroxyalkyl cellulose; and wherein the composition has a pH in the range of 10-12.9 at 30°C ± 0.5°C measured as a 10% w / v aqueous solution or as a neat composition is provided. The synthetic oil is selected from mineral oil, silicone, white oil, PPG-Stearyl ethers, synthetic squalane or combinations thereof. The source of alkalinity is preferably potassium hydroxide. The depilatory agent is preferably potassium thioglycolate. The C8-20 alkyl hydroxyalkyl cellulose is preferably cetyl hydroxyethyl cellulose. The use of a C8-20 alkyl hydroxyalkyl cellulose to provide a storage stable depilatory composition is provided, wherein the composition is stable for at least one week at a temperature of above freezing to up to 50°C. The use of the depilatory composition to remove hair from the body is provided. A method of hair removal using the depilatory composition is provided. A preferred composition comprises (a) mineral oil; (b) potassium hydroxide; (d) water; and (e) cetyl hydroxyethyl cellulose.

The application relates to a low-smoke halogen-free flame-retardant plastic and a preparation method thereof, and belongs to the technical field of flame-retardant high polymer materials. The components of the flame-retardant plastic are as follows: 12-17 wt% of magnesium hydroxide superfine powder, 4.5-6.2 wt% of modified flame retardant, 5-7 wt% of toughening agent, 0.9-1.2 wt% of lubricant, 0.3-0.4 wt% of antioxidant, and the rest is PBT resin; the modified flame retardant is prepared by reacting pentaerythritol and phosphorus oxychloride to form a cage-shaped phosphate ester containing a hydroxyl group, then acryloyl chloride is esterified with the hydroxyl group of the cage-shaped phosphate ester to form a monoester intermediate, and finally the thiol group of pentaerythritol tetramercaptoacetate is click-added to the double bond of the monoester intermediate; the modified flame retardant interacts with the magnesium hydroxide, a stable hollow carbon net is formed in the flame-retardant process, the smoke particles have a multilayer adsorption and filtration effect, the release of smoke is reduced, and the smoke density is greatly reduced.

To provide a hair-deforming cosmetic composition exhibiting low hair damage and having either a curling effect or a hair-straightening effect.SOLUTION: A hair-deforming cosmetic composition comprises thioglycolic acid, cysteamine, and an organic acid having a pKa value higher than that of thioglycolic acid, and its pH is adjusted to 8.0 or lower with a basic amino acid.SELECTED DRAWING: None

The application provides a thioglycolic acid modified carbon quantum dot, which is prepared by the following method: (1) preparing a carbon quantum dot solution by using Dicranopteris dichotoma leaves and / or Ricinus communis leaves as raw materials; (2) adding thioglycolic acid into the carbon quantum dot solution obtained in the step (1) so that the concentration of the thioglycolic acid is 0.5mmol-5mmol; after being sufficiently dissolved and mixed, the reaction is carried out at 100-140 DEG C for 1-6 hours to obtain the thioglycolic acid modified carbon quantum dot. The application finds that under suitable conditions, the inhibition effect of the thioglycolic acid modified carbon quantum dot on Ralstonia solanacearum is significantly enhanced, and the minimum inhibitory concentration and the bactericidal concentration are obviously reduced.

The invention discloses a preparation method of high-stability aviation gasoline, and relates to the field of fuel oil. When the high-stability aviation gasoline is prepared, magnetic powder reacts with mercaptoacetic acid and then reacts with polyvinylpyrrolidone to prepare porous sulfydryl modified magnetic particles; the porous sulfydryl modified magnetic particles, bis (3, 5-dicarboxyphenyl) azo and copper nitrate trihydrate are subjected to a reaction, and a magnetic desulfurizer is prepared; the method comprises the following steps: reacting a magnetic desulfurizer with base oil, and removing by magnetic adsorption to prepare primarily processed gasoline; the preparation method comprises the following steps: reacting diphenylamine, N-phenyl-alpha-naphthylamine and octylene to prepare an antioxidant; and uniformly mixing the antioxidant and the primarily processed gasoline. The high-stability aviation gasoline prepared by the preparation method disclosed by the invention has relatively low sulfur content and good stability.

The invention discloses a method for recovering elemental sulfur from oxygen pressure leaching residues, which comprises the following steps: firstly, dissociating elemental sulfur from mineral substances by adopting a grinding process, and then adopting N, N '-diethyldithiocarbamate and neutral oil as collecting agents and sodium thioglycolate as an inhibitor in flotation operation; the N, N-diethyldithiocarbamate and neutral oil synergistic collecting system is adopted in flotation operation, under the organic inhibition effect of bifunctional sodium thioglycollate, the number of times of concentration can be reduced, the grade of the sulfur concentrate can be improved, high-grade sulfur concentrate is successfully obtained through roughing and concentration of the flotation column, the grade can reach 90% or above, and the recovery rate can reach 80% or above. In addition, the method does not need heating or roasting, the used medicament is acid-resistant, the filtrate can be recycled, and the method has the advantages of simple process, low energy consumption, high resource recovery rate and the like, is suitable for efficient recovery of elemental sulfur in the oxygen pressure leaching process waste residues of zinc, copper, nickel and the like, and has a wide application prospect.

The invention discloses a preparation method of a three-phase Ag / Ag2S / h-RGO photocatalyst, comprising the following steps: functionalized SiO2 nanospheres are added to ultrapure water and dissolved to obtain a mixed solution; graphene oxide is dispersed in ultrapure water, ultrasonicated, and then placed in the mixed solution and vigorously stirred to generate SiO2@GO; NaBH4 is then added and stirred, followed by sodium hydroxide, the mixture is stirred, and the resulting product is washed to obtain h-RGO; h-RGO is dissolved in water, thioglycolic acid is added, and vigorously stirred; AgNO3 is then added and stirred, followed by Na2S·9H2O and stirred, followed by centrifugation to obtain a product dissolved in water, and silver sulfide is in situ reduced with a sodium borohydride solution; the product is washed and dried to obtain a three-phase Ag / Ag2S / h-RGO photocatalyst. The present invention adopts a layer-by-layer (LBL) self-assembly method to synthesize nanosheets RGO with a hollow structure, and a simple in situ growth method is used to prepare a three-phase Ag / Ag2S / h-RGO photocatalyst.

The present invention relates to the technical field of concrete admixtures and discloses a polycarboxylate water-reducing agent containing nanomaterials and a preparation method thereof. The present invention comprises adding solution A, alkenyl-modified silane chitosan, water, ammonium chloride, and ferrous sulfate to a reactor, and then adding a sodium persulfate initiator solution E, a mercaptoethanol reducing agent solution C, and a thioglycolic acid chain transfer agent solution D under stirring to initiate a polymerization reaction. Solution B is then added dropwise to the reaction mixture. After the addition is complete, the reaction is carried out, the product is cooled to room temperature, and the pH value is adjusted to neutral with an alkaline solution to obtain the polycarboxylate water-reducing agent containing nanomaterials. The chitosan in the alkenyl-modified silane chitosan can reduce the diffusion coefficient of chloride ions, improve the impermeability and density of concrete, and also improve the durability of concrete. The siloxane groups therein also improve the durability of concrete.

The invention relates to a flame-retardant lightweight elastomer material and a preparation method thereof, and belongs to the technical field of high polymer materials. The elastomer material is prepared from the following components in percentage by weight: 3.5 to 5.2 percent of modified flame retardant, 2.5 to 3.5 percent of polyalkenyl cross-linking agent, 0.1 to 0.13 percent of accelerant, 1.4 to 1.8 percent of lubricant, 0.15 to 0.2 percent of antioxidant and the balance of POE (Polyolefin Elastomer) resin, the modified flame retardant is prepared by the following steps: reacting o-aminobenzyl alcohol with formaldehyde to form a hydroxyl-containing triazine compound, namely an intermediate 1, carrying out click addition reaction on mercaptoacetic acid and methylallyl trisulfide to form a carboxyl-terminated intermediate 2, and finally esterifying the intermediate 2 and the intermediate 1. According to the modified flame retardant, through molecular design, in the high-temperature ignition process, high-efficiency flame suppression and low smoke and low loss are achieved through molecular-level staged flame retardance.

The present invention provides a chlorinated polyvinyl chloride resin composition capable of providing a molded article that is excellent in discoloration resistance and corrosion resistance and is not likely to cause environmental pollution as the amount of metal leached therefrom is small, and a chlorinated polyvinyl chloride resin molded article. The present invention relates to a chlorinated polyvinyl chloride resin composition containing: a chlorinated polyvinyl chloride resin; a thermal stabilizer; and at least one thioglycolic acid compound selected from the group consisting of thioglycolic acid and thioglycolic acid esters.

To provide a culture medium suitable for culturing and detecting lactic acid bacteria causing deterioration of a beer-like sparkling beverage, and to provide a method for detecting beer-spoilage lactic acid bacteria of the beer-like sparkling beverage by using the culture medium.SOLUTION: The culture medium and the beer-like sparkling beverage are used for detecting beer-spoilage lactic acid bacteria, and the beer-spoilage lactic acid bacteria are detected by inoculating the beer-spoilage lactic acid bacteria into the culture medium and culturing the beer-spoilage lactic acid bacteria in the culture medium, and Lactobacillus paracoinoides or Lactobacillus lindneri is detected by inoculating the beer-like sparkling beverage into the culture medium and culturing the beer-spoilage lactic acid bacteria in the culture medium. K1, To provide a method for detecting beer-spoilage lactic acid bacteria.SELECTED DRAWING: None

This invention discloses a cerium copper selenide (CCuSe2) compound thin film, its preparation method, and its applications. The preparation method includes: S1, mixing a copper source and a cerium source to obtain a cerium copper powder mixture; S2, adding thioglycolic acid and ethanolamine to the cerium copper powder mixture, heating and stirring until the cerium copper powder mixture is completely dissolved to obtain a mixed solution; S3, cooling the mixed solution to room temperature, adding a selenium source to the mixed solution, heating and stirring, reacting until the selenium source is completely dissolved, centrifuging, and obtaining the supernatant as the cerium copper selenide precursor solution; S4, spin-coating and sintering the cerium copper selenide precursor solution to obtain a cerium copper selenide pre-film; S5, subjecting the cerium copper selenide pre-film to high-temperature annealing, and cooling to obtain a cerium copper selenide thin film. This invention marks the first experimental synthesis of the CeCuSe2 compound, which matches the theoretically calculated CeCuSe2 crystal structure. The optical and electrical properties of CeCuSe2 materials were also investigated, confirming that cerium copper selenide thin films can be applied to solar cells and photocatalysis.

The invention relates to the technical field of battery materials, in particular to an organic pretreatment method in lithium sulfide ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometer) impurity test. The method mainly comprises the following steps: (1) weighing a lithium sulfide solid sample, and adding ultrapure water for dissolving to obtain a sample treatment solution; (2) adding chloroacetic acid into the sample treatment liquid, and converting the sulfur element in the lithium sulfide into the organic matter to obtain an intermediate liquid 1; (3) adding ammonia water into the intermediate solution 1 to adjust the pH value to 7-8, and converting excessive chloroacetic acid in the intermediate solution 1 and mercaptoacetic acid generated by the reaction into thiodiacetic acid to obtain an intermediate solution 2; and (4) adding hydrochloric acid into the intermediate solution 2 to adjust the pH value to 1-2, and then adding an organic solvent for extraction to obtain a water phase solution which is a solution to be detected. After extraction, the concentration of the S element in a water phase solution is extremely low, the experimental process is safe and controllable, and no chemical reagent influencing the test of the content of metal element impurities is added.

The invention relates to a nanoparticle for use as a drug carrier and the synthesis method of this nanoparticle. In the invention, magnesium / aluminium (Mg / AI) mucoadhesive thiolated layered double hydroxide (nLDHT) nanoparticles are thiolated with L-cysteine and / or thioglycolic acid and / or 2-iminothiolane hydrochloride and / or glutathione and / or N-acetyl cysteine and / or 3-mercaptopropionic acid and / or 6- mercaptohexanoic acid. Thus, nLDHT interacts with the mucin on the surface of the targeted mucosal tissue for a longer period of time and acts with fewer side effects in the target tissues.

The present application relates to a clethodim composition comprising clethodim or an agriculturally acceptable salt thereof and thioglycolic acid or a thioglycolic acid ester. The present application also relates to the use of thioglycolic acid or a thioglycolic acid ester as a stabilizer for clethodim or an agriculturally acceptable salt thereof. The present application further relates to a clethodim emulsifiable concentrate and a parent drug containing the composition of the present invention.

The invention relates to the technical field of biosensing and medical instruments, in particular to an organic electrochemical transistor sensor and a preparation method and application thereof. According to the specific technical scheme, the surface of a grid electrode is sequentially modified with a mercaptoacetic acid self-assembly layer, an anti-clostridium difficile toxin B (TcdB) antibody (such as E3), ethanolamine and bovine serum albumin (BSA), and a biological function interface with high specific recognition and strong non-specific adsorption resistance is constructed. The preparation method is simple and stable. The obtained sensor has extremely high detection sensitivity (fg / mL level), good selectivity and a wide linear range on TcdB, can complete detection within a few minutes, is particularly suitable for rapid and accurate detection of TcdB in a complex biological sample, and has a wide application prospect in the field of bedside diagnosis of clostridium difficile infection.

The present invention discloses a hydrophilic skeleton fluorine-containing polymer and its preparation method and application, belonging to the technical field of application-based material preparation. The hydrophilic skeleton fluorine-containing polymer of the present invention has a double hydrophilic structure of the skeleton and the side chain. Its good hydrophilicity enables it to have an excellent fluorine signal in the deep tissue of the organism, satisfying 19 The invention utilizes the characteristic of allyl (2-oxotetrahydrothiophene-3-yl) carbamate having dual reaction sites, introduces fluorine-containing 2-((2,2,2-trifluoroethyl)thio)ethane-1-amine into the system through a ring-opening reaction between an amino group and a thiolactone, obtains a precursor having dual reaction sites of a thiol group and a double bond, initiates photopolymerization with benzoin dimethyl ether, then introduces a carboxyl group at the end through thioglycolic acid, and finally obtains a fluorine-containing polymer with a dual hydrophilic skeleton and side chains through oxidation. The experimental operation is simple and the raw materials are readily available.

The invention belongs to the field of drug delivery and oral preparations, and provides an 8-O-acetyl harpagide nano-composition and a preparation method thereof.The 8-O-acetyl harpagide-soybean lecithin compound is used as a nuclear phase, lactobionic acid and thioglycolic acid dual-modified chitosan and sodium tripolyphosphate are subjected to ionic crosslinking to form a shell layer, and the 8-O-acetyl harpagide nano-composition is prepared. Compared with the prior art, the freeze-dried powder has the advantages of high loading capacity, high solid content, low viscosity and wide processing window, small particle size, low polydispersity index and stable nano dispersion are obtained, ethanol residue and water content of the freeze-dried powder are reduced, freeze-dried storage stability, redissolution redispersibility and oral release and absorption performance are improved, and the freeze-dried powder is suitable for large-scale production. The method is suitable for the development of oral preparations for preventing the acetaminophen-induced liver injury.

The utility model discloses a sodium thioglycolate-containing wastewater treatment device. A sodium thioglycolate-containing wastewater treatment system comprises a pretreatment tank, a centrifugal extraction device, a rectifying tower, a solvent feeding tank and a residual liquid neutralization tank, the pretreatment tank is used for mixing wastewater containing sodium thioglycolate with acid to form acidified wastewater; the centrifugal extraction device is used for carrying out centrifugal extraction treatment on the acidification wastewater; the rectifying tower is connected with a light phase outlet of the centrifugal extraction device; the solvent feeding tank is connected with a light phase feeding hole of the centrifugal extraction device; the top of the rectifying tower is connected with a solvent feeding tank; the residual liquid neutralization tank is connected with a heavy phase outlet of the centrifugal extraction device; according to the sodium thioglycolate-containing wastewater treatment system provided by the utility model, sodium thioglycolate is effectively separated and recycled, the resource utilization rate is improved, and the pollution to the environment is reduced.

This invention relates to the field of flame-retardant materials, specifically to a composite functional material based on antimony trioxide and its preparation method, comprising: an antimony trioxide core; a MOF (Metal-Oxide-Factory) interlayer; and a phosphorus-containing organosilicon shell. This invention successfully prepares a novel composite functional material with stable structure and excellent performance by constructing a three-layer core-shell structure of "antimony trioxide core - MOF interlayer - phosphorus-containing organosilicon shell" and employing a stepwise preparation strategy of "thioglycolic acid surface modification - in-situ growth of MOFs - free radical polymerization grafting." This material exhibits excellent technical effects in terms of flame retardant performance, compatibility, and mechanical property retention, providing a new approach and technical method for the development of high-performance flame-retardant functional materials.

The application belongs to the technical field of foamed ballast pad, and particularly relates to a polyurethane microporous foamed ballast pad and a preparation method thereof, which comprises the following components: an ISO component: aromatic diisocyanate, polytetrahydrofuran ether diol, polyether polyol and a retarder; a POLY component: polytetrahydrofuran ether diol, polymer polyol, 4,4'-methylenebis(2-chloroaniline), a heat-sensitive catalyst, dimethyl tin dimercaptoacetate, an alcohol amine catalyst, an amine catalyst, a foaming agent and a uniform foaming agent; the weight ratio of the ISO component and the POLY component is 100:90-205; the application can effectively improve the fatigue resistance and reduce the production cost.

The invention belongs to the technical field of preparation of catalytic materials, and particularly discloses a method for rapidly preparing a high-performance PtCo catalyst with low cost based on Joule heat, which comprises the following steps: (1) dissolving a chloroplatinic acid solution, a Co precursor, activated carbon and sodium thioglycolate in a mixed solvent composed of deionized water and ethanol, after ultrasonic dispersion, mixing and stirring to obtain a precursor solution; (2) drying the precursor solution prepared in the step (1) under the assistance of ultrasonic waves by adopting a rotary evaporation method, and then performing vacuum drying to obtain precursor powder; (3) grinding the precursor powder prepared in the step (2), mixing the ground precursor powder in carbon paper, and performing carbon thermal reduction reaction through Joule heat temperature rise to obtain mixed powder; and (4) carrying out acid pickling, filtering, washing and vacuum drying on the mixed powder prepared in the step (3) to prepare the PtCo catalyst. The preparation method is simple, short in preparation time and low in cost; the prepared catalyst is small in particle size, uniform in dispersion and high in ORR performance.

The present invention provides a method for treating isooctyl thioglycolate wastewater, wherein the isooctyl thioglycolate wastewater is passed through a fixed bed adsorption column equipped with an adsorbent material, and the effluent is collected; wherein the adsorbent material is a polystyrene-divinylbenzene resin modified with a carboxylic acid functional group. The present invention selects styrene-divinylbenzene modified with a carboxylic acid functional group, and the polarity of the resin is suitable for adsorbing isooctyl thioglycolate, which can effectively increase the adsorption capacity of the resin, so that the isooctyl thioglycolate in water can be effectively adsorbed, thereby improving adsorption efficiency.

The present invention relates to a composite adsorption material for efficiently purifying Hg(II), a preparation method, and applications thereof. 3-Aminopropyltrimethoxysilane (APTMS) is immobilized on the surface of DMSN to introduce amino groups. A silanization product is obtained by centrifugation, which is then dispersed in xylene with thioglycolic acid. The composite adsorption material TGC@DMSN is washed and dried. At a pH of 8, the composite adsorption material exhibits excellent removal of trace Hg(II) in water, with a maximum adsorption capacity of 257.1 mg / g. The composite adsorption material also exhibits good recycling performance and has promising application prospects in the field of environmental water purification.

The invention relates to an aqueous tin ion battery electrolyte and a battery, and belongs to the technical field of aqueous tin ion batteries. The electrolyte is prepared by mixing and stirring tin salt, acid, an additive and a solvent. Water serves as a main solvent, safety is high, and raw materials are easy to obtain. The selected tin salt is tin acetate, acetate and Sn < 2 + > are subjected to coordination, a solvation structure is adjusted, and uniform deposition / stripping of tin on the surface of the electrode is promoted. The selected additives comprise three types of substances including deacetylated chitin, mercaptoacetic acid and ammonium acetate. Under different current density conditions, the electrolyte can achieve the excellent performance that the first-circle coulombic efficiency (CE) exceeds 98%. The characteristic shows that the electrolyte effectively inhibits the occurrence of side reactions, and the stability of an electrode / electrolyte interface is greatly improved. In addition, the electrolyte is simple in preparation process and low in cost, and shows a good application prospect.

To provide a down perm composition exhibiting excellent perm effect and fragrance, and allowing simple use.SOLUTION: The present invention relates to a composition for down perm and a method for down perm treatment using the same. The present invention provides a composition for down perm, comprising ethanolamine thioglycolate, cetearyl alcohol, ethanolamine, a surfactant, mineral oil, petrolatum, ammonium thioglycolate, propylene glycol, beeswax, steartrimonium chloride, paraffin, amodimethicone, guar hydroxypropyltrimonium chloride, hydrolyzed keratin, potassium cocoyl glutamate, hydrolyzed collagen, etidronic acid, sodium dilauramidoglutamide lysine, hexanediol, ethylhexanediol, fragrance, and water.SELECTED DRAWING: None

The invention discloses a wastewater treatment device for producing mercaptoacetic acid, and belongs to the field of wastewater treatment equipment.The wastewater treatment device comprises a drainage mechanism, and a recycling mechanism is installed on one side of the outer wall of the drainage mechanism; by arranging the precipitation mechanism, wastewater subjected to neutralization treatment can be precipitated, by arranging the screen body, sludge and solid particles large in size can be screened and intercepted, then water with a small amount of suspended solids and impurities can penetrate through the screen body, and by arranging the L-shaped conveying pipe, the water can be conveyed to the water tank through the filter screen body. Water with a small amount of suspended solids and impurities can be conveyed into the adsorption box, honeycomb activated carbon in the adsorption box can adsorb the small amount of suspended solids and impurities, the water subjected to adsorption treatment can be guided into the drainage mechanism below by arranging the guide pipe, and final treatment can be performed on wastewater by arranging the filter screen body. The whole treatment process not only avoids the blockage of the drainage structure, but also improves the overall efficiency of wastewater treatment.

This invention provides a method for preparing a K2CrO4-regulated SnO2 composite electron transport layer, comprising: S1 dissolving urea in deionized water, adding thioglycolic acid, hydrochloric acid solution and SnCl2·2H2O to the deionized water to obtain a SnO2 precursor solution; S2 immersing a pretreated conductive glass substrate in the diluted SnO2 precursor solution for a first heating reaction to obtain a deposited SnO2 conductive glass substrate; S3 adding a K2CrO4 aqueous solution to the deposited SnO2 conductive glass substrate for a second heating reaction to obtain a deposited SnO2 / K2CrO4 conductive glass substrate; and S4 washing and annealing the deposited SnO2 / K2CrO4 conductive glass substrate to form a K2CrO4-regulated SnO2 electron transport layer. Introducing K2CrO4 as an oxidizing additive during the chemical bath deposition process allows for the synergistic regulation of the crystallization process, electrical properties, and band structure of SnO2ETL. This results in a K2CrO4-regulated SnO2 electron transport layer with low trap density, high conductivity, and ideal energy level arrangement, significantly improving the photoelectric conversion efficiency of perovskite solar cells and enhancing their operational stability and lifespan.

The invention discloses an oil-resistant and wear-resistant fluororubber sealing ring and a processing technology thereof. The invention relates to the technical field of rubber sealing rings. The oil-resistant and wear-resistant fluororubber sealing ring comprises the following main components in parts by mass: 70-80 parts of fluororubber, 10-20 parts of modified composite filler, 1-2 parts of an accelerant, 4-6 parts of a modified vulcanizing agent and 1-3 parts of an anti-aging agent, according to the fluororubber ring, the multiwalled carbon nanotubes are compounded with silicon dioxide, the wear resistance of the fluororubber ring is remarkably improved by utilizing the unique molecular structure of SiO2 and the relatively high bond energy of Si-O bonds as well as the multiwalled carbon nanotubes serving as carbon materials and having the effect of a rubber reinforcing agent, and on the basis, thioglycollic acid is used for further modification, so that the wear resistance of the fluororubber ring is improved, and the wear resistance of the fluororubber ring is improved. Meanwhile, the silane coupling agent is used for cooperating with the modified vulcanizing agent, so that the wear resistance and the stability of the fluororubber sealing ring are remarkably improved.

To provide a depilatory composition capable of suppressing skin irritation and enhancing emulsification stability and depilatory efficacy.SOLUTION: There is provided a depilatory composition which comprises thioglycolic acid and / or its salt (component A), a polyoxyethylene cetyl ether having an HLB value of 10 or more and an average addition molar number of ethylene oxide of less than 100 (component B), a polyoxyethylene alkyl ether having an HLB value of 10 or more and an alkyl group having 18 or more carbon atoms (component C) and a polyoxyethylene alkyl ether having an HLB value of 7 or more and less than 10 in which the alkyl group is a straight-chain (component D), wherein the content of the component A in terms of thioglycolic acid structure is 2.0 mass% to 5.0 mass%, the mass molar concentration of calcium ions is 0.2 mol / kg to 0.9 mol / kg and the mass molar concentration of alkali metal ions is 0.2 mol / kg to 0.6 mol / kg.SELECTED DRAWING: None