105439-91-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 105439-91-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,4,3 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 105439-91:
(8*1)+(7*0)+(6*5)+(5*4)+(4*3)+(3*9)+(2*9)+(1*1)=116
116 % 10 = 6
So 105439-91-6 is a valid CAS Registry Number.