5509-90-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5509-90-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,5,0 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 5509-90:
(6*5)+(5*5)+(4*0)+(3*9)+(2*9)+(1*0)=100
100 % 10 = 0
So 5509-90-0 is a valid CAS Registry Number.
5509-90-0Relevant articles and documents
Preparation of 1,5-disubstituted tetrazoles under phase-transfer conditions
Artamonova,Zhivich,Dubinskii,Koldobskii
, p. 1428 - 1430 (2007/10/03)
Imidoyl chlorides, obtained by common methods from a wide range of aromatic mono- and diamides, are smoothly converted to the corresponding tetrazoles in high yields by treatment with NaN3 under phase-transfer conditions.