7764-91-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7764-91-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,6 and 4 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 7764-91:
(6*7)+(5*7)+(4*6)+(3*4)+(2*9)+(1*1)=132
132 % 10 = 2
So 7764-91-2 is a valid CAS Registry Number.