109688-49-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109688-49-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,6,8 and 8 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 109688-49:
(8*1)+(7*0)+(6*9)+(5*6)+(4*8)+(3*8)+(2*4)+(1*9)=165
165 % 10 = 5
So 109688-49-5 is a valid CAS Registry Number.