204130-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204130-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,1,3 and 0 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 204130-81:
(8*2)+(7*0)+(6*4)+(5*1)+(4*3)+(3*0)+(2*8)+(1*1)=74
74 % 10 = 4
So 204130-81-4 is a valid CAS Registry Number.