21808-55-9 Usage
Uses
A metabolite of Flurazepam
Controlled substance (depressant).
Check Digit Verification of cas no
The CAS Registry Mumber 21808-55-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,8,0 and 8 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21808-55:
(7*2)+(6*1)+(5*8)+(4*0)+(3*8)+(2*5)+(1*5)=99
99 % 10 = 9
So 21808-55-9 is a valid CAS Registry Number.