221313-79-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221313-79-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,3,1 and 3 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 221313-79:
(8*2)+(7*2)+(6*1)+(5*3)+(4*1)+(3*3)+(2*7)+(1*9)=87
87 % 10 = 7
So 221313-79-7 is a valid CAS Registry Number.