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491572-42-0

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491572-42-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 491572-42-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,9,1,5,7 and 2 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 491572-42:
(8*4)+(7*9)+(6*1)+(5*5)+(4*7)+(3*2)+(2*4)+(1*2)=170
170 % 10 = 0
So 491572-42-0 is a valid CAS Registry Number.

491572-42-0Downstream Products

491572-42-0Relevant articles and documents

Halogenation of N-substituted p-quinonimines and p-quinone oxime esters: I. Chlorination and bromination of 4-aroyloxyimino- and arylsulfonyloxyimino-2,5-cyclohexadienones

Avdeenko,Shishkina,Shishkin,Glinyanaya,Konovalova,Goncharova

, p. 683 - 691 (2007/10/03)

Chlorine and bromine addition to 4-aroyloxyimino- and 4-arylsulfonyloxymino-3-methyl-2,5-cyclohexadienones initially occurs at the C5=C6 double bond. The second chlorine molecule adds at both C2=C3 and C5=C6 double bonds. The chlorination of 2,5-dialkyl-substituted 4-aroyloxyimino- and 4-arylsulfonyloxymino-2,5-cyclohexadienones involves either of the C=C bonds in the quinoid ring.

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