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1820-33-3

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1820-33-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1820-33-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,2 and 0 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1820-33:
(6*1)+(5*8)+(4*2)+(3*0)+(2*3)+(1*3)=63
63 % 10 = 3
So 1820-33-3 is a valid CAS Registry Number.

1820-33-3Relevant articles and documents

Phase Transfer Catalysis. Part-II: Studies of a Few Michael Reactions of Synthetic Utility under Phase Transfer Catalysis

Banerjee, Satinath,Gupta, Mita Datta,Sarkar, Asis,Nasipuri, Dhanonjoy

, p. 1163 - 1168 (2007/10/02)

A few Michael condensations with ethyl cyanoacetate, diethyl malonate, benzyl cyanide, o-methylbenzyl cyanide and benzyl methyl ketone as donors and 4-methylpent-3-en-2-one (mesityl oxide), ethyl acrylate, methyl crotonate and methyl α,α-dimethylacrylate

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