198777-91-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 198777-91-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,8,7,7 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 198777-91:
(8*1)+(7*9)+(6*8)+(5*7)+(4*7)+(3*7)+(2*9)+(1*1)=222
222 % 10 = 2
So 198777-91-2 is a valid CAS Registry Number.