90721-42-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 90721-42-9 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, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 90721-42:
(7*9)+(6*0)+(5*7)+(4*2)+(3*1)+(2*4)+(1*2)=119
119 % 10 = 9
So 90721-42-9 is a valid CAS Registry Number.