botox

The Basic Traits
BTXA is a clinical injection products,is conposed of amount of the BTXA by adding appropriate protection to freeze-dried, is white osteoporosis, after saline soluted is a colorless or pale yellow transparent solution, and no insoluble and impurities.
Products quality standards and Stability
FDA have proposed stricter requirements in the quality of BTXA when treatment. Their standards are as follows:
1, Refining toxin can be dissolved in phosphate buffer, and in the detection of UV spectrophotometer at 278nm have the maximum light absorption.
2,At the analyze of UV spectrophotometer, OD260/OD278 �� 0.6.
3, Specific toxicity and purity was 3.0 �� 107LD50 (mice) �� 20% / mg.
4,In 1 cm optical path, 1mg/ml toxin have 1.65 extinction coefficient.
5,In the observation of high optical microscope , toxins were a single needle.
As the requirement of quality standards, freeze-dried products can store three years in -20 �� C,two years under 2...

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