21271-05-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21271-05-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,7 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21271-05:
(7*2)+(6*1)+(5*2)+(4*7)+(3*1)+(2*0)+(1*5)=66
66 % 10 = 6
So 21271-05-6 is a valid CAS Registry Number.