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857539-88-9

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857539-88-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 857539-88-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,5,3 and 9 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 857539-88:
(8*8)+(7*5)+(6*7)+(5*5)+(4*3)+(3*9)+(2*8)+(1*8)=229
229 % 10 = 9
So 857539-88-9 is a valid CAS Registry Number.

857539-88-9Relevant articles and documents

Synthesis and characterization of some nitrobenzanthrones: Suspected new mutagens in atmospheric environment

Suzuki,Enya,Hisamatsu

, p. 1273 - 1276 (1997)

Five mononitro-, three dinitro- and one trinitrobenzanthrones have been synthesized by the modified Ullmann cross-coupling reaction between nitro-substituted 1-iodonaphthalene and methyl 2-iodobenzoates, followed by the Friedel-Crafts ring closure of the resulting 2-(1-naphthyl)benzoic acid derivatives.

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