1289-31-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1289-31-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,2,8 and 9 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1289-31:
(6*1)+(5*2)+(4*8)+(3*9)+(2*3)+(1*1)=82
82 % 10 = 2
So 1289-31-2 is a valid CAS Registry Number.