90109-70-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 90109-70-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,1,0 and 9 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 90109-70:
(7*9)+(6*0)+(5*1)+(4*0)+(3*9)+(2*7)+(1*0)=109
109 % 10 = 9
So 90109-70-9 is a valid CAS Registry Number.