90158-93-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 90158-93-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,1,5 and 8 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 90158-93:
(7*9)+(6*0)+(5*1)+(4*5)+(3*8)+(2*9)+(1*3)=133
133 % 10 = 3
So 90158-93-3 is a valid CAS Registry Number.
90158-93-3Relevant articles and documents
PYRIDYLETHYLATION - A NEW PROTECTION METHOD FOR ACTIVE HYDROGEN COMPOUNDS
Katritzky, Alan R.,Khan, Ghulam R.,Schwarz, Otto A.
, p. 1223 - 1226 (1984)
2-(2- or 4-Pyridyl)ethyl group is readily introduced by pyridylethylation and easily removed after activation by quaternisation with methyl iodide.