109841-64-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109841-64-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,8,4 and 1 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 109841-64:
(8*1)+(7*0)+(6*9)+(5*8)+(4*4)+(3*1)+(2*6)+(1*4)=137
137 % 10 = 7
So 109841-64-7 is a valid CAS Registry Number.