91899-91-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91899-91-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,8,9 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 91899-91:
(7*9)+(6*1)+(5*8)+(4*9)+(3*9)+(2*9)+(1*1)=191
191 % 10 = 1
So 91899-91-1 is a valid CAS Registry Number.