21516-41-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21516-41-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,1 and 6 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21516-41:
(7*2)+(6*1)+(5*5)+(4*1)+(3*6)+(2*4)+(1*1)=76
76 % 10 = 6
So 21516-41-6 is a valid CAS Registry Number.