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27781-21-1

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27781-21-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 27781-21-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,7,7,8 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 27781-21:
(7*2)+(6*7)+(5*7)+(4*8)+(3*1)+(2*2)+(1*1)=131
131 % 10 = 1
So 27781-21-1 is a valid CAS Registry Number.

27781-21-1Relevant articles and documents

Reactions with 3-methyl-1-phenyl-2-pyrazolin-4,5-dione: A novel synthesis of bis-p-(n,n-dialkylaminophenyl) malononitriles

Atta, Aly H.,Younes, Mansour I.,Metwally, Saoud A.

, p. 77 - 81 (2007/10/03)

Bis-p-(N,N-dialkylaminophenyl)malononitriles (6a,b) have been prepared previously and in low yields from: a) interaction of dicyanodiazomethane1 or carbonyl cyanide2 with N,N-dialkylanilines; b) as byproducts in tricyanovinylation of tertiary aromatic amines using tetracyanoetylene.3 5 Such syntheses need highly poisonous and difficultly obtained chemicals. This communication describes the preparation of the title compounds by a facile process, with high yields and from readily accessible materials.

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