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88759-60-8

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88759-60-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 88759-60-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,8,7,5 and 9 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 88759-60:
(7*8)+(6*8)+(5*7)+(4*5)+(3*9)+(2*6)+(1*0)=198
198 % 10 = 8
So 88759-60-8 is a valid CAS Registry Number.

88759-60-8Relevant articles and documents

Method for preparing levorotatory oxiracetam crystal form II through pH method

-

, (2017/09/01)

The invention relates to a preparation method of a levorotatory oxiracetam crystal form II. The method comprises the steps of adopting S-4-chlorine-3-hydroxybutyrate and sodium azide as starting raw materials for preparing to obtain high-purity (S)-4-hydroxy-2 oxo-1-pyrrolidine acetamide; using acetic acid/ammonium hydroxide for preparing to obtain the (S)-4-hydroxy-2 oxo-1-pyrrolidine acetamide crystal from II through a pH method. The optical purity is 99.9 percent or above, and the product quality of the (S)-4-hydroxy-2 oxo-1-pyrrolidine acetamide crystal from II is greatly improved.

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