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1637641-75-8

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1637641-75-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1637641-75-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,7,6,4 and 1 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1637641-75:
(9*1)+(8*6)+(7*3)+(6*7)+(5*6)+(4*4)+(3*1)+(2*7)+(1*5)=188
188 % 10 = 8
So 1637641-75-8 is a valid CAS Registry Number.

1637641-75-8Relevant academic research and scientific papers

A convenient preparation of bis(4-methoxyphenyl)methanethiol and its application in the synthesis of biotin thioacid

Chou, Tzyy-Chao,Hsu, Yu-Ling,Lo, Lee-Chiang

, p. 707 - 710 (2014/06/24)

We have established a facile protocol for the preparation of bis(4-methoxyphenyl)methanethiol (4). Thiol 4 was used to prepare biotin thioester 7 which was later subjected to acidolysis to afford biotin thioacid (1b) in high yield. Compound 1b represents

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