691381-21-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 691381-21-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,1,3,8 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 691381-21:
(8*6)+(7*9)+(6*1)+(5*3)+(4*8)+(3*1)+(2*2)+(1*1)=172
172 % 10 = 2
So 691381-21-2 is a valid CAS Registry Number.