Cas 857212-28-3,C8H8O5S

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Check Digit Verification of cas no

The CAS Registry Mumber 857212-28-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,2,1 and 2 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 857212-28:
(8*8)+(7*5)+(6*7)+(5*2)+(4*1)+(3*2)+(2*2)+(1*8)=173
173 % 10 = 3
So 857212-28-3 is a valid CAS Registry Number.

857212-28-3Upstream product

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857212-28-3Relevant articles and documents

Phase-Transfer Catalyzed Synthesis of Amides and Esters of Carboxylic Acids

Jaszay, Zsuzsa M.,Petnehazy, Imre,Toeke, Laszlo

, p. 745 - 747 (1989)

A convenient one-pot procedure is reported for the preparation of carboxamides and carboxylic acid esters from carboxylic acids and amines or alcohols, respectively.The carboxylic acids are activated by sulfonyl chlorides under solid-liquid phase-transfer conditions using solid potassium carbonate as base and a lipophilic quaternary ammonium salt as catalyst.

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857212-28-3