109641-81-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109641-81-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,6,4 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 109641-81:
(8*1)+(7*0)+(6*9)+(5*6)+(4*4)+(3*1)+(2*8)+(1*1)=128
128 % 10 = 8
So 109641-81-8 is a valid CAS Registry Number.