7773-91-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7773-91-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,7 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 7773-91:
(6*7)+(5*7)+(4*7)+(3*3)+(2*9)+(1*1)=133
133 % 10 = 3
So 7773-91-3 is a valid CAS Registry Number.