Method for preparing terbutaline sulphate crystal form B meeting medicinal requirements
A technology of terbutaline sulfate and crystal form, which is applied in the field of medicine, can solve problems such as the method for preparing terbutaline sulfate crystal form B that has not been clearly disclosed, and achieve the effect of stable chemical and physical properties
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Embodiment 1
[0032] 0.5 g of non-B crystalline terbutaline sulfate was stirred in 10 ml of aqueous ethyl acetate (saturated with water) at 25° C. for 24 hours, and then the resulting suspension was dried at 50° C. under nitrogen flow to constant weight. Terbutaline sulfate crystal form B was obtained.
Embodiment 2
[0034]0.5 g of non-B crystalline terbutaline sulfate was stirred in 10 ml of aqueous ethyl acetate (water half-saturated) at 25°C for 24 hours, and then the resulting suspension was dried at 50°C under nitrogen flow to constant weight. Terbutaline sulfate crystal form B was obtained.
Embodiment 3
[0036] 0.5 g of non-B crystalline terbutaline sulfate was stirred in 10 ml of aqueous ethyl acetate (saturated with water) at 35° C. for 24 hours, and then the resulting suspension was dried at 50° C. under nitrogen flow to constant weight. Terbutaline sulfate crystal form B was obtained.
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