105109-90-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 105109-90-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,1,0 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 105109-90:
(8*1)+(7*0)+(6*5)+(5*1)+(4*0)+(3*9)+(2*9)+(1*0)=88
88 % 10 = 8
So 105109-90-8 is a valid CAS Registry Number.