221187-41-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221187-41-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,8 and 7 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 221187-41:
(8*2)+(7*2)+(6*1)+(5*1)+(4*8)+(3*7)+(2*4)+(1*1)=103
103 % 10 = 3
So 221187-41-3 is a valid CAS Registry Number.