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18631-76-0

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18631-76-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18631-76-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,6,3 and 1 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 18631-76:
(7*1)+(6*8)+(5*6)+(4*3)+(3*1)+(2*7)+(1*6)=120
120 % 10 = 0
So 18631-76-0 is a valid CAS Registry Number.

18631-76-0Relevant articles and documents

Synthesis of Polynitrobenzenes. Oxidation of Polynitroanilines and Their N-Hydroxy, N-Methoxy, and N-Acetyl Derivatives

Atkins, Ronald L.,Nielsen, Arnold T.,Bergens, Cynthia,Wilson, William S.

, p. 503 - 507 (2007/10/02)

Nitro-substituted arylhydroxylamines and alkyloxyamines have been oxidized to polynitroaryl compounds by utilizing ozone.Polynitroanilines have been oxidized to polynitroaromatics by peroxydisulfuric acid generated in situ from SO3 and ozone.Thus N-hydroxy-2,4,6-trinitroaniline (1a) or N-methoxy-2,4,6-trinitroaniline (1b) was cleanly oxidized to 1,2,3,5-tetranitrobenzene (2) by reaction with ozone in methylene chloride.Weakly basic amines such as pentanitroaniline (10) can conveniently be oxidized to hexanitrobenzene (11) in high yields by simply dissolving the amine in oleum and introducing ozone.A variety of substituted arylamines have been oxidized to polynitroaromatic compounds by using these two oxidation techniques.

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