640283-62-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 640283-62-1 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 3 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 640283-62:
(8*6)+(7*4)+(6*0)+(5*2)+(4*8)+(3*3)+(2*6)+(1*2)=141
141 % 10 = 1
So 640283-62-1 is a valid CAS Registry Number.