20748-18-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20748-18-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,7,4 and 8 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 20748-18:
(7*2)+(6*0)+(5*7)+(4*4)+(3*8)+(2*1)+(1*8)=99
99 % 10 = 9
So 20748-18-9 is a valid CAS Registry Number.