669775-77-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 669775-77-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,9,7,7 and 5 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 669775-77:
(8*6)+(7*6)+(6*9)+(5*7)+(4*7)+(3*5)+(2*7)+(1*7)=243
243 % 10 = 3
So 669775-77-3 is a valid CAS Registry Number.