21779-52-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21779-52-2 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, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21779-52:
(7*2)+(6*1)+(5*7)+(4*7)+(3*9)+(2*5)+(1*2)=122
122 % 10 = 2
So 21779-52-2 is a valid CAS Registry Number.