1738-57-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1738-57-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,3 and 8 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1738-57:
(6*1)+(5*7)+(4*3)+(3*8)+(2*5)+(1*7)=94
94 % 10 = 4
So 1738-57-4 is a valid CAS Registry Number.
1738-57-4Relevant articles and documents
Novel gas-phase cyclisation reactions of 2-(1-pyrazolyl)phenylnitrenes
Clark, Bernard A. J.,McNab, Hamish,Sommerville, Craig C.
, p. 1211 - 1212 (2007/10/03)
Flash vacuum pyrolysis of the azide 3 gives a mixture of pyrazolobenzotriazole 2, quinoxaline 5 and pyrazolobenzimidazole 4 derived from the corresponding nitrene.