202831-54-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 202831-54-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,2,8,3 and 1 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 202831-54:
(8*2)+(7*0)+(6*2)+(5*8)+(4*3)+(3*1)+(2*5)+(1*4)=97
97 % 10 = 7
So 202831-54-7 is a valid CAS Registry Number.