21115-11-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21115-11-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,1 and 5 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21115-11:
(7*2)+(6*1)+(5*1)+(4*1)+(3*5)+(2*1)+(1*1)=47
47 % 10 = 7
So 21115-11-7 is a valid CAS Registry Number.