669749-54-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 669749-54-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,9,7,4 and 9 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 669749-54:
(8*6)+(7*6)+(6*9)+(5*7)+(4*4)+(3*9)+(2*5)+(1*4)=236
236 % 10 = 6
So 669749-54-6 is a valid CAS Registry Number.