7669-26-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7669-26-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,6,6 and 9 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 7669-26:
(6*7)+(5*6)+(4*6)+(3*9)+(2*2)+(1*6)=133
133 % 10 = 3
So 7669-26-3 is a valid CAS Registry Number.