669759-43-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 669759-43-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,9,7,5 and 9 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 669759-43:
(8*6)+(7*6)+(6*9)+(5*7)+(4*5)+(3*9)+(2*4)+(1*3)=237
237 % 10 = 7
So 669759-43-7 is a valid CAS Registry Number.