90721-10-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 90721-10-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,7,2 and 1 respectively; the second part has 2 digits, 1 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 90721-10:
(7*9)+(6*0)+(5*7)+(4*2)+(3*1)+(2*1)+(1*0)=111
111 % 10 = 1
So 90721-10-1 is a valid CAS Registry Number.