191977-91-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 191977-91-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,9,7 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 191977-91:
(8*1)+(7*9)+(6*1)+(5*9)+(4*7)+(3*7)+(2*9)+(1*1)=190
190 % 10 = 0
So 191977-91-0 is a valid CAS Registry Number.