21947-77-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21947-77-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,4 and 7 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 21947-77:
(7*2)+(6*1)+(5*9)+(4*4)+(3*7)+(2*7)+(1*7)=123
123 % 10 = 3
So 21947-77-3 is a valid CAS Registry Number.