221696-42-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221696-42-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,6,9 and 6 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 221696-42:
(8*2)+(7*2)+(6*1)+(5*6)+(4*9)+(3*6)+(2*4)+(1*2)=130
130 % 10 = 0
So 221696-42-0 is a valid CAS Registry Number.