289631-80-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 289631-80-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,9,6,3 and 1 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 289631-80:
(8*2)+(7*8)+(6*9)+(5*6)+(4*3)+(3*1)+(2*8)+(1*0)=187
187 % 10 = 7
So 289631-80-7 is a valid CAS Registry Number.