900490-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 900490-21-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,0,0,4,9 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 900490-21:
(8*9)+(7*0)+(6*0)+(5*4)+(4*9)+(3*0)+(2*2)+(1*1)=133
133 % 10 = 3
So 900490-21-3 is a valid CAS Registry Number.