1159691-42-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1159691-42-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,5,9,6,9 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1159691-42:
(9*1)+(8*1)+(7*5)+(6*9)+(5*6)+(4*9)+(3*1)+(2*4)+(1*2)=185
185 % 10 = 5
So 1159691-42-5 is a valid CAS Registry Number.
1159691-42-5Relevant articles and documents
A simple and efficient synthesis of ethyl 1-Aryl-4-formyl-1H-pyrazole-3- carboxylates
Matiychuk, Vasyl S.,Potopnyk, Mykhaylo A.,Obushak, Mykola D.
, p. E43-E47 (2013/06/04)
A new simple and convenient method of synthesis of ethyl 1-aryl-4-formyl-1H-pyrazole-3-carboxylates from aromatic amines via diazonium salts has been developed. Hydrolysis and hydrazinolyization of these compounds has been investigated.
