21779-79-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21779-79-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,7,7 and 9 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21779-79:
(7*2)+(6*1)+(5*7)+(4*7)+(3*9)+(2*7)+(1*9)=133
133 % 10 = 3
So 21779-79-3 is a valid CAS Registry Number.