1016818-91-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1016818-91-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,1,6,8,1 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1016818-91:
(9*1)+(8*0)+(7*1)+(6*6)+(5*8)+(4*1)+(3*8)+(2*9)+(1*1)=139
139 % 10 = 9
So 1016818-91-9 is a valid CAS Registry Number.