201731-11-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 201731-11-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,1,7,3 and 1 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 201731-11:
(8*2)+(7*0)+(6*1)+(5*7)+(4*3)+(3*1)+(2*1)+(1*1)=75
75 % 10 = 5
So 201731-11-5 is a valid CAS Registry Number.
201731-11-5Relevant articles and documents
Process for the Preparation of 1-Phenyl-1,2,4-triazoles
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Page/Page column 6, (2011/04/19)
The present invention relates to a process for the preparation of 1-phenyl-1,2,4-triazoles by converting phenyl hydrazides to N′-(iminomethyl)-N′-phenylacetyl hydrazides and the further reaction thereof by cyclization to give 1-phenyl-1,2,4-triazoles.