640297-00-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 640297-00-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,0,2,9 and 7 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 640297-00:
(8*6)+(7*4)+(6*0)+(5*2)+(4*9)+(3*7)+(2*0)+(1*0)=143
143 % 10 = 3
So 640297-00-3 is a valid CAS Registry Number.