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222-19-5

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222-19-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 222-19-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 2,2 and 2 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 222-19:
(5*2)+(4*2)+(3*2)+(2*1)+(1*9)=35
35 % 10 = 5
So 222-19-5 is a valid CAS Registry Number.

222-19-5Relevant articles and documents

Convenient and efficient synthesis of 1-oxo-1,2,3,4-tetrahydrocarbazoles via Fischer indole synthesis

Sheng, Rong,Shen, Li,Chen, You-Qin,Hu, Yong-Zhou

body text, p. 1120 - 1127 (2009/09/08)

A convenient synthesis of 1-oxo-1,2,3,4-tetra-hydrocarbazoles has been developed by reaction of 2-aminocyclohexanone hydrochlorides with various phenylhydrazine hydrochlorides via Fischer indole synthesis under mild conditions. The method is more satisfac

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