203740-40-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203740-40-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,7,4 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 203740-40:
(8*2)+(7*0)+(6*3)+(5*7)+(4*4)+(3*0)+(2*4)+(1*0)=93
93 % 10 = 3
So 203740-40-3 is a valid CAS Registry Number.