72109-52-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 72109-52-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,1,0 and 9 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 72109-52:
(7*7)+(6*2)+(5*1)+(4*0)+(3*9)+(2*5)+(1*2)=105
105 % 10 = 5
So 72109-52-5 is a valid CAS Registry Number.