21261-94-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21261-94-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,6 and 1 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 21261-94:
(7*2)+(6*1)+(5*2)+(4*6)+(3*1)+(2*9)+(1*4)=79
79 % 10 = 9
So 21261-94-9 is a valid CAS Registry Number.