691388-33-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 691388-33-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,1,3,8 and 8 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 691388-33:
(8*6)+(7*9)+(6*1)+(5*3)+(4*8)+(3*8)+(2*3)+(1*3)=197
197 % 10 = 7
So 691388-33-7 is a valid CAS Registry Number.