6,8,8-Trimethyl-2,4,5,7-tetraphenyl-2,3,4,4a,5,6,7,8-octahydropyrido<4,3-d>pyrimidine is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 87731-91-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,7,3 and 1 respectively; the second part has 2 digits, 9 and 1 respectively. Calculate Digit Verification of CAS Registry Number 87731-91: (7*8)+(6*7)+(5*7)+(4*3)+(3*1)+(2*9)+(1*1)=167 167 % 10 = 7 So 87731-91-7 is a valid CAS Registry Number.