721387-09-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 721387-09-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,2,1,3,8 and 7 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 721387-09:
(8*7)+(7*2)+(6*1)+(5*3)+(4*8)+(3*7)+(2*0)+(1*9)=153
153 % 10 = 3
So 721387-09-3 is a valid CAS Registry Number.