221296-23-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221296-23-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,2,9 and 6 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 221296-23:
(8*2)+(7*2)+(6*1)+(5*2)+(4*9)+(3*6)+(2*2)+(1*3)=107
107 % 10 = 7
So 221296-23-7 is a valid CAS Registry Number.