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94786-53-5

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94786-53-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 94786-53-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,4,7,8 and 6 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 94786-53:
(7*9)+(6*4)+(5*7)+(4*8)+(3*6)+(2*5)+(1*3)=185
185 % 10 = 5
So 94786-53-5 is a valid CAS Registry Number.

94786-53-5Relevant articles and documents

Ring Opening and Substitution Reactions of 4,4-Dihalo-pyrazolin-5-ones with Nucleophiles

Kirschke, Klaus,Lutze, Gerhard,Schmitz, Ernst

, p. 367 - 373 (2007/10/02)

1-Aryl-4,4-dihalo-3-methyl-pyrazolin-5-ones (1a-c) undergo ring opening with alkoxides and form alkyl 3-arylazo-2-halo-2-butenoates (2a-d).Analogous reactions take place with ammonia and amines. 4-Nitro-phenoxide reacts with substitution of both halogens to the 4,4-bis(4-nitro-phenyl)-compound (5).Phenols are selectively ortho-brominated by the title compounds 1a and b.

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