221156-65-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221156-65-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,5 and 6 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 221156-65:
(8*2)+(7*2)+(6*1)+(5*1)+(4*5)+(3*6)+(2*6)+(1*5)=96
96 % 10 = 6
So 221156-65-6 is a valid CAS Registry Number.