21985-69-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21985-69-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,8 and 5 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21985-69:
(7*2)+(6*1)+(5*9)+(4*8)+(3*5)+(2*6)+(1*9)=133
133 % 10 = 3
So 21985-69-3 is a valid CAS Registry Number.