663956-74-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 663956-74-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,3,9,5 and 6 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 663956-74:
(8*6)+(7*6)+(6*3)+(5*9)+(4*5)+(3*6)+(2*7)+(1*4)=209
209 % 10 = 9
So 663956-74-9 is a valid CAS Registry Number.