669693-40-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 669693-40-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,9,6,9 and 3 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 669693-40:
(8*6)+(7*6)+(6*9)+(5*6)+(4*9)+(3*3)+(2*4)+(1*0)=227
227 % 10 = 7
So 669693-40-7 is a valid CAS Registry Number.