72509-90-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 72509-90-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,5,0 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 72509-90:
(7*7)+(6*2)+(5*5)+(4*0)+(3*9)+(2*9)+(1*0)=131
131 % 10 = 1
So 72509-90-1 is a valid CAS Registry Number.