289665-70-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 289665-70-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,9,6,6 and 5 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 289665-70:
(8*2)+(7*8)+(6*9)+(5*6)+(4*6)+(3*5)+(2*7)+(1*0)=209
209 % 10 = 9
So 289665-70-9 is a valid CAS Registry Number.