Cas 294202-81-6,diethyl (4-nitrobenzenesulfonyloxymethyl)phosphonate

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Check Digit Verification of cas no

The CAS Registry Mumber 294202-81-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,9,4,2,0 and 2 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 294202-81:
(8*2)+(7*9)+(6*4)+(5*2)+(4*0)+(3*2)+(2*8)+(1*1)=136
136 % 10 = 6
So 294202-81-6 is a valid CAS Registry Number.

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294202-81-6Relevant articles and documents

Convenient synthesis of dialkyl 1-azidoalkylphosphonates using tetramethylguanidinium azide as azidation agent

Blaszczyk, Roman,Gajda, Tadeusz

, p. 1110 - 1119 (2008)

A simple and safe method for the preparation of dialkyl 1-azidoalkylphosphonates from dialkyl 1-(4-nitrobenzenesulfonyloxy) alkylphosphonates (dialkyl 1-(nosyloxy)alkylphosphonates) and tetramethylguanidinium azide (TMGA) has been developed. Copyright Tay

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294202-81-6