73902-31-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 73902-31-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,9,0 and 2 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 73902-31:
(7*7)+(6*3)+(5*9)+(4*0)+(3*2)+(2*3)+(1*1)=125
125 % 10 = 5
So 73902-31-5 is a valid CAS Registry Number.