640280-64-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 640280-64-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,0,2,8 and 0 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 640280-64:
(8*6)+(7*4)+(6*0)+(5*2)+(4*8)+(3*0)+(2*6)+(1*4)=134
134 % 10 = 4
So 640280-64-4 is a valid CAS Registry Number.