1289107-23-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1289107-23-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,8,9,1,0 and 7 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1289107-23:
(9*1)+(8*2)+(7*8)+(6*9)+(5*1)+(4*0)+(3*7)+(2*2)+(1*3)=168
168 % 10 = 8
So 1289107-23-8 is a valid CAS Registry Number.