691858-18-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 691858-18-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,1,8,5 and 8 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 691858-18:
(8*6)+(7*9)+(6*1)+(5*8)+(4*5)+(3*8)+(2*1)+(1*8)=211
211 % 10 = 1
So 691858-18-1 is a valid CAS Registry Number.