1289385-31-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1289385-31-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,8,9,3,8 and 5 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1289385-31:
(9*1)+(8*2)+(7*8)+(6*9)+(5*3)+(4*8)+(3*5)+(2*3)+(1*1)=204
204 % 10 = 4
So 1289385-31-4 is a valid CAS Registry Number.