646509-90-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 646509-90-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,6,5,0 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 646509-90:
(8*6)+(7*4)+(6*6)+(5*5)+(4*0)+(3*9)+(2*9)+(1*0)=182
182 % 10 = 2
So 646509-90-2 is a valid CAS Registry Number.