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91757-87-8

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91757-87-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91757-87-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,7,5 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 91757-87:
(7*9)+(6*1)+(5*7)+(4*5)+(3*7)+(2*8)+(1*7)=168
168 % 10 = 8
So 91757-87-8 is a valid CAS Registry Number.

91757-87-8Downstream Products

91757-87-8Relevant articles and documents

Fused-s-triazino Heterocycles. XI. Displacement Reactions of 7,9-Dichloro-2,5-bis(trichloromethyl)-1,3,4,6,9b-pentaazaphenalene

Shaw, John T.,Rapple, Rodney S.,Hicks, John C.,Vossers, John T.

, p. 429 - 432 (2007/10/02)

The preparation of 7,9-dichloro-2,5-bis(trichloromethyl)-1,3,4,6,9b-pentaazaphenalene (1e) by the chlorination of 2-trichloromethyl-5-methyl-1,3,4,6,9b-pentaazaphenalene (1a) using molecular chlorine is described.Displacement of one or both trichloromethyl groups of 1e by a variety of nucleophiles led to the corresponding 7,9-dichloro-2,5-bis-substituted or 7,9-dichloro mixed 2,5-disubstituted derivatives.The reaction of 1a with N-chlorosuccinimide proved not to be a useful route to 1e but instead led primarily to substitution of position 7 and/or 9 by chlorine.

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