203924-71-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203924-71-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,9,2 and 4 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 203924-71:
(8*2)+(7*0)+(6*3)+(5*9)+(4*2)+(3*4)+(2*7)+(1*1)=114
114 % 10 = 4
So 203924-71-4 is a valid CAS Registry Number.