Deodorizing composition, and method for deodorization

Abstract

To provide a deodorizing composition (excluding odor improvers for food materials or foods and drinks) capable of controlling unfavorable odors, and a deodorization method using the same.SOLUTION: The present invention provides a deodorizing composition (excluding odor improvers for food materials or foods and drinks) containing at least one of prenol and isoprenol, as well as a deodorization method using the deodorizing composition (excluding odor improvers for food materials or foods and drinks).SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a deodorizing composition and a deodorizing method. [Background technology]

[0002] Some odors have unique, unpleasant odors. For example, acetic acid odor, ammonia odor, isovaleric acid odor, 2-nonenal odor, trimethylamine odor, methyl mercaptan odor, etc. Attempts are being made to reduce these odors by using fragrances, etc. However, even when a fragrance is used, the above-mentioned unique odors cannot be sufficiently suppressed, and there is a problem that the odors are mixed with the odor of the fragrance.

[0003] Patent Document 1 describes an aging odor suppressing composition that contains ethanolamine. However, ethanolamine is known to be toxic and to have a strong amine or ammonia odor.

[0004] Therefore, there is a strong demand for the rapid provision of new materials that can suppress undesirable odors. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2001-97838 A Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention aims to solve the above-mentioned conventional problems and achieve the following objectives: That is, the present invention aims to provide a deodorizing composition (excluding odor improvers for food ingredients or food and drink) that can suppress undesirable odors, and a deodorizing method. [Means for solving the problem]

[0007] As a result of intensive research conducted by the present inventors in order to solve the above problems, it was found that the use of prenol and isoprenol makes it possible to suppress undesirable odors.

[0008] The present invention is based on the findings of the present inventors, and the means for solving the above problems are as follows. <1> The present invention relates to a deodorizing composition (excluding odor improving agents for food ingredients or foods and beverages) that contains at least one of prenol and isoprenol. <2> The above <1> This is a deodorizing method characterized by using the deodorizing composition (excluding odor improving agents for food ingredients or food and drink) described in the above. Effect of the Invention

[0009] According to the present invention, it is possible to provide a deodorizing composition (excluding odor improvers for food ingredients or food and beverages) and a deodorizing method that can solve the above-mentioned problems in the conventional art, achieve the above-mentioned object, and suppress undesirable odors. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (Deodorizing composition (excluding odor improving agents for food ingredients or food and drink)) The deodorizing composition of the present invention (excluding the odor improving agent for foodstuffs or foods and drinks) contains at least one of prenol and isoprenol, and may further contain other components.

[0011] The uses of the deodorizing composition are not particularly limited, except for use as an odor improving agent for food ingredients or food and beverages, and can be appropriately selected. Examples of the uses include use in the air, on the body, on clothing, on shoes, on bags, on furniture, and on home appliances. The above (excluding odor improving agents for food ingredients or food and beverages) means excluding the use for improving the odor of food ingredients or food and beverages. In other words, it means that the use of the deodorizing composition for improving the odor of food ingredients or food and beverages is excluded from the uses of the composition for deodorization.

[0012] In this specification, improving odor means that when a deodorizing composition (excluding odor improving agents for food ingredients or food and beverages) is used, an undesirable odor is suppressed (hereinafter sometimes referred to as "reduced") compared to when a deodorizing composition (excluding odor improving agents for food ingredients or food and beverages) is not used.

[0013] <Prenol, isoprenol> Prenol is a compound represented by the following structural formula. [ka]

[0014] Isoprenol is a compound represented by the following structural formula and is an isomer of prenol. [ka]

[0015] Both prenol and isoprenol are known compounds, and may be produced by known methods such as chemical synthesis or microbial production, or may be commercially available. Natural products such as citrus fruits and alcoholic beverages that contain at least one of prenol and isoprenol may also be used.

[0016] The deodorizing composition (excluding the odor improving agent for foodstuffs or foods and drinks) may contain either prenol or isoprenol, or may contain both.

[0017] The state of the deodorizing composition (excluding the odor improving agent for food ingredients or food and drink) is not particularly limited and can be appropriately selected, and examples thereof include liquid, gel, paste, solid, and the like. The solid is not particularly limited and can be appropriately selected. For example, the solid may be in the form of a powder or granules.

[0018] The odor of the deodorizing composition (excluding the odor improving agent for foodstuffs or foods and drinks) is not particularly limited and may be appropriately selected, but odorlessness is preferable.

[0019] The total content of at least any one of prenol and isoprenol in the deodorizing composition (excluding the odor improving agent for foodstuffs or foods and beverages) is not particularly limited and can be selected appropriately.

[0020] The lower limit of the total amount of at least any one of prenol and isoprenol in the deodorizing composition (excluding odor improvers for food ingredients or foods and beverages) is not particularly limited and may be selected as appropriate, but from the viewpoint of further suppressing undesirable odors, it is preferably 0.2 ppb (mass / volume) or more, more preferably 2 ppb (mass / volume) or more, even more preferably 20 ppb (mass / volume) or more, even more preferably 200 ppb (mass / volume) or more, particularly preferably 300 ppb (mass / volume) or more, and most preferably 500 ppb (mass / volume) or more. The upper limit of the total amount of at least any one of prenol and isoprenol in the deodorizing composition (excluding odor improvers for food ingredients or foods and beverages) is not particularly limited and may be selected as appropriate, but in terms of not imparting the odor of at least any one of prenol and isoprenol (not imparting an additional odor), it is preferably 100 ppm (mass / volume) or less, more preferably 50 ppm (mass / volume) or less, even more preferably 20 ppm (mass / volume) or less, even more preferably 10 ppm (mass / volume) or less, particularly preferably 5 ppm (mass / volume) or less, and most preferably 2 ppm (mass / volume) or less. In addition, a numerical range having a lower limit and an upper limit that are any of the numerical values ​​shown as the lower limit and any of the numerical values ​​shown as the upper limit, respectively, is preferable. Among these, from the viewpoint of further suppressing undesirable odors and not imparting the odor of at least one of prenol and isoprenol (not imparting an additional odor), 0.2 ppb (mass / volume) to 100 ppm (mass / volume) is preferred, 2 ppb (mass / volume) to 50 ppm (mass / volume) is more preferred, 20 ppb (mass / volume) to 20 ppm (mass / volume) is even more preferred, 200 ppb (mass / volume) to 10 ppm (mass / volume) is even more preferred, 500 ppb (mass / volume) to 5 ppm (mass / volume) is particularly preferred, and 500 ppb (mass / volume) to 2 ppm (mass / volume) is most preferred.

[0021] When the total amount of at least one of prenol and isoprenol in the deodorant composition is within the above-mentioned preferred range, it is advantageous in that undesirable odors can be further suppressed without imparting additional fragrance. That is, when the total amount of at least one of prenol and isoprenol in the deodorant composition is within the above-mentioned preferred range, the deodorant effect can be exerted at a concentration where the odor of prenol or isoprenol itself is not felt. When the total amount of at least one of prenol and isoprenol in the deodorant composition is within the above-mentioned preferred range, the deodorant composition can also be an odorless type deodorant composition. In addition, "the total amount of at least one of prenol and isoprenol" means the total amount of prenol and isoprenol when the deodorizing composition (excluding odor improving agents for food ingredients or food and beverages) contains prenol and isoprenol, and means the amount of at least one of prenol and isoprenol when the deodorizing composition (excluding odor improving agents for food ingredients or food and beverages) contains at least one of prenol and isoprenol.

[0022] When the prenol and the isoprenol are used in combination, the ratio of the amounts used (mass ratio) of the two is not particularly limited and can be appropriately selected depending on the purpose.

[0023] <Other ingredients> The other components in the deodorant composition (excluding the odor improver for foodstuffs or foods and beverages) are not particularly limited as long as they do not impair the effects of the present invention, and can be appropriately selected according to the purpose, and examples thereof include solvents (ethers, esters, glycols, oils and fats, hydrocarbons, ketones, fatty acids, alcohols (excluding prenol and isoprenol), water, etc.), surfactants, fragrances, colorants, gelling agents, repellent components, preservatives, insect repellent components, insecticides, antioxidants, light stabilizers, pH adjusters, ultraviolet absorbers, antibacterial agents, fungicides, deodorant components other than prenol and isoprenol, etc. These may be used alone or in combination of two or more.

[0024] The content of other components in the deodorizing composition (excluding the odor improving agent for foodstuffs or foods and beverages) is not particularly limited and can be appropriately selected depending on the purpose.

[0025] The form of the deodorizing composition (excluding the odor improving agent for food ingredients or food and drink) is not particularly limited and can be appropriately selected depending on the purpose, and for example, when the deodorizing composition (excluding the odor improving agent for food ingredients or food and drink) is liquid, it can be an aqueous solution, an aqueous alcohol solution, etc. Among these, the aqueous solution form is preferred in that it can further suppress undesirable odors and does not impart additional odors.

[0026] The deodorizing composition (excluding odor improving agents for food ingredients or foods and beverages) can also be used by impregnating it into inorganic powders such as silica, silica gel, and ceramics; sheet substrates such as paper, natural fibers or synthetic fibers, and nonwoven or woven fabrics made from blends of these; and organic powders such as polypropylene, polyethylene, ethylene-vinyl acetate copolymer, activated carbon, and wood flour, or by molding it into a powder or granule form.

[0027] The water used in the aqueous solution or aqueous alcohol solution is not particularly limited and can be appropriately selected depending on the purpose.

[0028] The alcohol used in the aqueous alcohol solution is not particularly limited and can be appropriately selected depending on the purpose. For example, ethanol is included. The concentration of the alcohol in the aqueous alcohol solution is not particularly limited and can be appropriately selected depending on the purpose, and may be, for example, 1% by volume to 45% by volume.

[0029] The method for producing the deodorizing composition (excluding the odor improving agent for food ingredients or food and beverages) is not particularly limited and can be appropriately selected depending on the aspect. For example, it can be produced by adding and mixing at least one of prenol and isoprenol to water or an aqueous alcohol solution. In addition, alcoholic beverages can be produced by a known method using a yeast capable of producing at least one of prenol and isoprenol, and this can be used as the deodorizing composition (excluding the odor improving agent for food ingredients or food and beverages).

[0030] The deodorizing composition of the present invention (excluding the odor improving agent for food ingredients or food and drink) can suppress undesirable odors. In this specification, examples of undesirable odors include acetic acid odor, ammonia odor, isovaleric acid odor, 2-nonenal odor, trimethylamine odor, methyl mercaptan odor, 2,3-butanedione odor, butyric acid odor, acetaldehyde odor, 2,4,6-trichloroanisole odor, hexanal odor, DL-2-methylbutyric acid odor, isobutyric acid odor, cis-3-hexenal odor, and dimethyl trisulfide.

[0031] The odor that can be suppressed by the deodorizing composition (excluding the odor improving agent for foodstuffs or foods and drinks) may be one kind or two or more kinds.

[0032] The deodorizing composition (excluding odor improvers for food ingredients or foods and beverages) preferably suppresses at least one of acetic acid odor, ammonia odor, isovaleric acid odor, 2-nonenal odor, trimethylamine odor, and methyl mercaptan odor.

[0033] (Deodorizing method) The deodorizing method of the present invention uses the deodorizing composition of the present invention (excluding the odor improving agent for foodstuffs or foods and beverages). The deodorizing composition of the present invention (excluding odor improvers for food ingredients or food and drink) can be used by impregnating inorganic powders such as silica, silica gel, and ceramics; sheet substrates such as paper, natural fibers, synthetic fibers, and nonwoven or woven fabrics made of blends of these; and organic powders such as polypropylene, polyethylene, ethylene-vinyl acetate copolymer, activated carbon, and wood flour, or by molding into a powder or granule form.

[0034] <Deodorizing composition (excluding odor improving agents for food ingredients or food and drink)> The deodorizing composition (excluding the odor improving agent for foodstuffs or foods and beverages) is the above-mentioned deodorizing composition (excluding the odor improving agent for foodstuffs or foods and beverages) of the present invention.

[0035] <Deodorizing method> The deodorizing method of the present invention is not particularly limited, so long as it uses the deodorizing composition of the present invention (excluding odor improving agents for food ingredients or food and beverages), and can be appropriately selected depending on the purpose. For example, the deodorizing method may include a method of spraying or placing the deodorizing composition (excluding odor improving agents for food ingredients or food and beverages) in a space, a method of contacting (spraying, applying or dripping) the composition with an object present in the space, or a method of contacting (spraying, applying or dripping) the composition with the body, clothing, shoes, bags, furniture, home appliances, etc.

[0036] According to the deodorizing method of the present invention, it is possible to suppress undesirable odors and improve odors. EXAMPLES

[0037] The present invention will be specifically explained below by way of test examples, but the present invention is not limited to these test examples.

[0038] (Test Example 1) <Sample> The following samples were prepared: Control: distilled water Test section: A mixed aqueous solution of 1 ppm prenol and 1 ppm isoprenol

[0039] The prenol and isoprenol used were the following commercially available products that were purified. Prenol (product code: M0714, manufactured by Tokyo Chemical Industry Co., Ltd.) Isoprenol (product code: M0726, manufactured by Tokyo Chemical Industry Co., Ltd.)

[0040] <Odor components (subject to deodorization)> Each reagent was prepared into a standard solution as follows. Except for methyl mercaptan, the compositions were adjusted with reference to the manual for implementing the sensory evaluation method for the deodorizing performance test method established by the Japan Textile Evaluation Technology Council, as described in Textile Product Consumption Science 2002 44(9):515-528 (Japan Textile Product Consumption Science Association). Acetic acid: 0.5 mL of acetic acid (product code 017-00256, special grade reagent (99.7%), manufactured by Wako Pure Chemical Industries, Ltd.) was added to 100 mL of distilled water. Ammonia: 7.2 mL of 28% aqueous ammonia (product code 016-03146, special grade reagent (28%), manufactured by Wako Pure Chemical Industries, Ltd.) was added to 100 mL of distilled water. Isovaleric acid: 1 mL of isovaleric acid (product code M0182, special grade reagent (98%), manufactured by Tokyo Chemical Industry Co., Ltd.) was added to 100 mL of distilled water, and 0.5 mL of the resulting aqueous solution was added to 100 mL of distilled water. 2-Nonenal: 0.7 mL of 2-nonenal (product code N0521, special grade reagent (98%), manufactured by Tokyo Chemical Industry Co., Ltd.) was added to 100 mL of ethanol, and 0.3 mL of the resulting alcohol solution was added to 100 mL of ethanol. Trimethylamine: 5 mL of trimethylamine standard solution (product code 200-06483, special grade reagent (30%), manufactured by Wako Pure Chemical Industries, Ltd.) was added to 100 mL of distilled water, and 1 mL of the resulting aqueous solution was added to 100 mL of distilled water. Methyl mercaptan: 0.15 mL of methyl mercaptan sodium (product code M0096, special grade reagent (15%), manufactured by Tokyo Chemical Industry Co., Ltd.) was added to 100 mL of distilled water.

[0041] The test was conducted with reference to the manual for implementing the sensory evaluation method for the deodorizing performance test method established by the Japan Textile Evaluation Technology Council, as described in Textile Product Consumption Science 2002 44(9):515-528 (Japan Textile Product Consumption Science Society).

[0042] Two paper wipers measuring 8 x 6 cm (product name "Kimwipe" manufactured by Nippon Paper Crecia Co., Ltd.) were prepared. Two sets of these paper wipers (trade name "Kimwipe" by Nippon Paper Crecia Co., Ltd.) were prepared by tying each of them with string to a hanger jig hung on a hook. One set of paper wipers (Nippon Paper Crecia Co., Ltd.; product name "Kimwipe") was soaked in distilled water (control), and the other set of paper wipers (Nippon Paper Crecia Co., Ltd.; product name "Kimwipe") was soaked in a mixed aqueous solution of 1 ppm prenol and 1 ppm isoprenol (test group). Table 1 shows the volumes of distilled water or the mixed solution of 1 ppm prenol and 1 ppm isoprenol. Using a micropipette, the volume of the standard solution of odorous components shown in Table 1 was dropped onto the side wall of an Erlenmeyer flask. Thereafter, the Erlenmeyer flask was quickly covered with a jig having a paper wiper (Nippon Paper Crecia Co., Ltd., product name "Kimwipe") attached thereto, and the flask was left to stand for 120 minutes while stirring with a magnetic stirrer.

[0043] After 120 minutes, the Erlenmeyer flask was moved to a ventilated area or a location with a ventilation window where there was no odor that could affect the test. The sealant of the Erlenmeyer flask was removed, and a sensory evaluation was conducted by 10 expert panelists who placed their noses over the mouth of the flask to evaluate the strength of the atmospheric odor according to the evaluation criteria shown in Table 2. For the test plots, the odor intensity of prenol and isoprenol was also evaluated sensorily according to the evaluation criteria shown in Table 2.

[0044] The results are shown in Table 1. The numerical values ​​of the sensory results in Table 1 indicate the average values ​​of the scores (ratings) shown in Table 2. In Table 1, " ** " indicates "significant difference (1%)."

[0045] [Table 1]

[0046] [Table 2]

[0047] (Test Example 2) <Odor components (subject to deodorization)> The following reagents were prepared. Ammonia: A 500 ppm aqueous solution was prepared using 28% ammonia water (product code 016-03146, manufactured by Wako Pure Chemical Industries, Ltd.). Acetic acid: A 75 ppm aqueous solution of acetic acid (product code 017-00256, manufactured by Wako Pure Chemical Industries, Ltd.) was prepared. Isovaleric acid: A 1 ppm aqueous solution of isovaleric acid (product code M0182, manufactured by Tokyo Chemical Industry Co., Ltd.) was prepared. Methyl mercaptan sodium: A 4.5 ppm aqueous solution of methyl mercaptan sodium (product code M0096, manufactured by Tokyo Chemical Industry Co., Ltd.) was prepared. 2-Nonenal: A 0.5 ppm aqueous solution of 2-nonenal (product code N0521, manufactured by Tokyo Chemical Industry Co., Ltd.) was prepared. Trimethylamine: A 5 ppm aqueous solution was prepared using trimethylamine standard solution (product code 200-06483, Wako Pure Chemical Industries, Ltd.). 2,3-butanedione: A 0.375 ppm aqueous solution was prepared using 2,3-butanedione (product code: 041-00632, Fujifilm Wako Pure Chemical Industries, Ltd.). Butyric acid: A 0.9 ppm aqueous solution of butyric acid (product code: 029-05393, Fujifilm Wako Pure Chemical Industries, Ltd.) was prepared. Acetaldehyde: A 65 ppm aqueous solution of acetaldehyde (product code: 015-09576, Fujifilm Wako Pure Chemical Industries, Ltd.) was prepared. 2,4,6-Trichloroanisole: A 100 ppb aqueous solution was prepared using 2,4,6-trichloroanisole (product code: T0867, Tokyo Chemical Industry Co., Ltd.). Hexanal: A 3 ppm aqueous solution of hexanal (product code: 085-02633, Fujifilm Wako Pure Chemical Industries, Ltd.) was prepared. DL-2-methylbutyric acid: A 1000 ppm aqueous solution of DL-2-methylbutyric acid (product code: M0181, Tokyo Chemical Industry Co., Ltd.) was prepared. Isobutyric acid: A 1250 ppm aqueous solution of isobutyric acid (product code: I0103, Tokyo Chemical Industry Co., Ltd.) was prepared. Cis-3-hexenal: A 1 ppm aqueous solution was prepared using cis-3-hexenal (product code: sc-489441, Santa Cruz Biotechnology). Dimethyl trisulfide: A 2 ppb aqueous solution was prepared using dimethyl trisulfide (product code: 327-41221, Fujifilm Wako Pure Chemical Industries, Ltd.).

[0048] Each of the reagents prepared as above was used as a malodorous liquid. In the test area, the malodorous liquid was sprayed twice onto a 10 cm x 10 cm cotton pad using a sprayer (SDR-108, Toppan Printing Co., Ltd.: volume per spray was approximately 1 mL), and then a mixed aqueous solution of 1 ppm prenol and 1 ppm isoprenol was sprayed once. In the control, the malodor liquid was sprayed twice onto a 10 cm×10 cm cotton pad using a sprayer (SDR-108, Toppan Printing Co., Ltd.: volume per spray was approximately 1 mL). The prenol and isoprenol used were the following commercially available products that were purified. Prenol (product code: M0714, manufactured by Tokyo Chemical Industry Co., Ltd.) Isoprenol (product code: M0726, manufactured by Tokyo Chemical Industry Co., Ltd.)

[0049] After spraying, the cotton was placed in a 200-milliliter beaker, covered with parafilm, and left to stand for 5 minutes. After 5 minutes, the odor of the cotton (the odor of the component to be deodorized) was subjected to a sensory evaluation by 10 expert panelists using the same evaluation criteria as in Test Example 1 (Table 2). For the test plots, the odor intensity of prenol and isoprenol was also evaluated sensorily according to the same evaluation criteria as in Test Example 1 (Table 2).

[0050] The results are shown in Table 3. The numerical values ​​of the sensory results in Table 3 indicate the average values ​​of the scores (ratings) shown in Table 2. In Table 3, " ** " indicates "significant difference (1%)."

[0051] [Table 3]

[0052] (Test Example 3) <Odor components (subject to deodorization)> The reagents were prepared as follows: Hexanal: A 3 ppm aqueous solution of hexanal (product code: 085-02633, Fujifilm Wako Pure Chemical Industries, Ltd.) was prepared.

[0053] The reagent prepared as above was used as a malodorous liquid. In the test areas, the malodorous liquid was sprayed once onto a 10 cm x 10 cm cotton pad using a sprayer (SDR-108, Toppan Printing Co., Ltd.: volume per spray was approximately 1 mL), and then a mixed aqueous solution of prenol and isoprenol was sprayed three times according to the concentrations listed in Table 4 for each test area. In the control, the malodor liquid was sprayed once onto a 10 cm×10 cm cotton pad using a sprayer (SDR-108, Toppan Printing Co., Ltd.: volume per spray was approximately 1 mL). The prenol and isoprenol used were the following commercially available products that were purified. Prenol (product code: M0714, manufactured by Tokyo Chemical Industry Co., Ltd.) Isoprenol (product code: M0726, manufactured by Tokyo Chemical Industry Co., Ltd.)

[0054] After spraying, the cotton was placed in a 200-milliliter beaker, covered with parafilm, and left to stand for 5 minutes. After 5 minutes, the odor of the cotton (the odor of the component to be deodorized) was subjected to a sensory evaluation by 10 expert panelists using the same evaluation criteria as in Test Example 1 (Table 2). The odor intensity of lenol and isoprenol was also evaluated using the same evaluation criteria as in Test Example 1 (Table 2).

[0055] The results are shown in Table 4. The numerical values ​​of the sensory results in Table 4 indicate the average values ​​of the scores (ratings) shown in Table 2. In Table 4, " ** " indicates "significant difference (1%)."

[0056] [Table 4]

[0057] From the above results, it was confirmed that the use of prenol or isoprenol can suppress undesirable odors.

[0058] Examples of aspects of the present invention include the following. <1> The present invention relates to a deodorizing composition (excluding odor improving agents for food ingredients or foods and beverages) that contains at least one of prenol and isoprenol. <2> The deodorizing composition is for use in the air, the body, clothing, shoes, bags, furniture, or home appliances. <1> The deodorizing composition (excluding odor improving agents for food ingredients or food and drink) described above. <3> The above is liquid, gel, paste, or solid. <1> The deodorizing composition (excluding odor improving agents for food ingredients or food and drink) described above. <4> The deodorant composition is odorless. <1> The deodorizing composition (excluding odor improving agents for food ingredients or food and drink) described above. <5> The total amount of at least one of prenol and isoprenol in the deodorant composition is 0.2 ppb (mass / volume) or more and 100 ppm (mass / volume) or less. <1> The deodorizing composition (excluding odor improving agents for food ingredients or food and drink) described above. <6> The odor to be deodorized is at least one of acetic acid odor, ammonia odor, isovaleric acid odor, 2-nonenal odor, trimethylamine odor, methyl mercaptan odor, 2,3-butanedione odor, butyric acid odor, acetaldehyde odor, 2,4,6-trichloroanisole odor, hexanal odor, DL-2-methylbutyric acid odor, isobutyric acid odor, cis-3-hexenal odor, and dimethyl trisulfide. <1> The deodorizing composition (excluding odor improving agents for food ingredients or food and drink) described above. <7> The above <1> from <6> The present invention is a deodorizing method that uses the deodorizing composition (excluding an agent for improving the odor of food ingredients or foods and beverages) described in any one of the above.

Claims

1. A deodorizing composition (excluding odor improving agents for food ingredients or foods and beverages) characterized by containing at least one of prenol and isoprenol.

2. The deodorizing composition according to claim 1, which is a deodorizing composition for space, the body, clothing, shoes, bags, furniture, or home appliances (excluding odor improving agents for food ingredients or food and drink).

3. The deodorizing composition according to claim 1 (excluding odor improving agents for food ingredients or food and drink) which is liquid, gel, paste, or solid.

4. The deodorizing composition according to claim 1, which is odorless (excluding odor improving agents for foodstuffs or foods and beverages).

5. The deodorizing composition according to claim 1 (excluding odor improvers for food ingredients or foods and beverages), wherein the total amount of at least one of prenol and isoprenol in the deodorizing composition is 0.2 ppb (mass / volume) or more and 100 ppm (mass / volume) or less.

6. The odor eliminating composition according to claim 1 (excluding odor improvers for food ingredients or foods and beverages), wherein the odor to be deodorized is at least any one of acetic acid odor, ammonia odor, isovaleric acid odor, 2-nonenal odor, trimethylamine odor, methyl mercaptan odor, 2,3-butanedione odor, butyric acid odor, acetaldehyde odor, 2,4,6-trichloroanisole odor, hexanal odor, DL-2-methylbutyric acid odor, isobutyric acid odor, cis-3-hexenal odor, and dimethyl trisulfide.

7. A deodorizing method, comprising using the deodorizing composition according to any one of claims 1 to 6 (excluding an agent for improving the odor of foodstuffs or foods and beverages).

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