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64409-70-7

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64409-70-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 64409-70-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,4,4,0 and 9 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 64409-70:
(7*6)+(6*4)+(5*4)+(4*0)+(3*9)+(2*7)+(1*0)=127
127 % 10 = 7
So 64409-70-7 is a valid CAS Registry Number.

64409-70-7Upstream product

64409-70-7Downstream Products

64409-70-7Relevant articles and documents

Facile synthesis of carboxylic anhydrides using 4,5-dichloro-2-[(4-nitrophenyl)sulfonyl]pyridazin-3(2H)-one

Kim, Jeum-Jong,Park, Yong-Dae,Song Lee, Woo,Cho, Su-Dong,Yoon, Yong-Jin

, p. 1517 - 1520 (2003)

A novel and facile synthesis of carboxylic anhydrides from carboxylic acid using 4,5-dichloro-2-[(4-nitrophenyl)sulfonyl]pyridazin-3(2H)-one (2) is presented. Treatment of aliphatic or aromatic carboxylic acids with 2 in the presence of base in organic solvents gave the corresponding anhydrides in good or excellent yields.

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