644959-65-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 644959-65-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,4,9,5 and 9 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 644959-65:
(8*6)+(7*4)+(6*4)+(5*9)+(4*5)+(3*9)+(2*6)+(1*5)=209
209 % 10 = 9
So 644959-65-9 is a valid CAS Registry Number.