99861-99-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99861-99-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,8,6 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 99861-99:
(7*9)+(6*9)+(5*8)+(4*6)+(3*1)+(2*9)+(1*9)=211
211 % 10 = 1
So 99861-99-1 is a valid CAS Registry Number.