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104891-98-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 104891-98-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,4,8,9 and 1 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 104891-98:
137 % 10 = 7
So 104891-98-7 is a valid CAS Registry Number.

104891-98-7Relevant articles and documents

New Azoolefines and their Acidic Cleavage to Aryldiimines

Kirschke, Klaus,Moeller, Angela,Schmitz, Ernst

, p. 893 - 898 (2007/10/02)

3-Amino-1-aryl-3',3'-dimethyl-pyrazolin-4-spiro-2'-oxiran-5-ones (3a-c) undergo ring opening with methoxide forming methyl 3-amino-3-arylazo-propenoates (5a-c). 5a-c are cleaved under acidic conditions.The main products of the cleavage of 5c with methanolic hydrochloric acid are nitrogen, 2,4,6-trichloro-benzene (6), 2,4,6-trichloro-aniline (9) and 2,4,6-trichloro-phenylhydrazine (10).Intermediates of the cleavage of 5 are aryldiimines trapped with benzaldehyde as the corresponding benzhydrazides (12a,b).

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