4521-90-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4521-90-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,5,2 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 4521-90:
(6*4)+(5*5)+(4*2)+(3*1)+(2*9)+(1*0)=78
78 % 10 = 8
So 4521-90-8 is a valid CAS Registry Number.