Cas 1353503-21-5,5-methyl-1-phenylpyrazole-4-sulfonic acid

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Check Digit Verification of cas no

The CAS Registry Mumber 1353503-21-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,5,3,5,0 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1353503-21:
(9*1)+(8*3)+(7*5)+(6*3)+(5*5)+(4*0)+(3*3)+(2*2)+(1*1)=125
125 % 10 = 5
So 1353503-21-5 is a valid CAS Registry Number.

1353503-21-5Upstream product

6831-91-0 5-methyl-1-phenylpyrazole

1353503-21-5Downstream Products

1360469-07-3 2,5-dimethyl-1-phenylpyrazol-2-ium-4-sulfonate

1353503-21-5Relevant articles and documents

Pyrazolium-sulfonates. Mesomeric betaines possessing iminium-sulfonate partial structures

Dreger, Andrij,Muenster, Niels,Nieto-Ortega, Belen,Ramirez, Francisco Javier,Gjikaj, Mimoza,Schmidt, Andreas

experimental part, p. 20 - 37 (2012/03/22)

Pyrazolium-3-sulfonates and pyrazolium-4-sulfonates possessing the iminiomethanesulfonate and the 3-iminio-pro-1-ene-2-sulfonate partial structure are prepared. Formally, they represent sulfur analogs of cross-conjugated (CCMB) and pseudo-cross-conjugated

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1353503-21-5