134747-25-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 134747-25-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,7,4 and 7 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 134747-25:
(8*1)+(7*3)+(6*4)+(5*7)+(4*4)+(3*7)+(2*2)+(1*5)=134
134 % 10 = 4
So 134747-25-4 is a valid CAS Registry Number.
134747-25-4Relevant 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.