72818-31-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 72818-31-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,8,1 and 8 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 72818-31:
(7*7)+(6*2)+(5*8)+(4*1)+(3*8)+(2*3)+(1*1)=136
136 % 10 = 6
So 72818-31-6 is a valid CAS Registry Number.