640734-92-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 640734-92-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,0,7,3 and 4 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 640734-92:
(8*6)+(7*4)+(6*0)+(5*7)+(4*3)+(3*4)+(2*9)+(1*2)=155
155 % 10 = 5
So 640734-92-5 is a valid CAS Registry Number.