669772-56-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 669772-56-9 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 2 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 669772-56:
(8*6)+(7*6)+(6*9)+(5*7)+(4*7)+(3*2)+(2*5)+(1*6)=229
229 % 10 = 9
So 669772-56-9 is a valid CAS Registry Number.