21520-88-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21520-88-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,2 and 0 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 21520-88:
(7*2)+(6*1)+(5*5)+(4*2)+(3*0)+(2*8)+(1*8)=77
77 % 10 = 7
So 21520-88-7 is a valid CAS Registry Number.
InChI:InChI=1/C9H9N3O2/c10-9-12-11-8(14-9)6-13-7-4-2-1-3-5-7/h1-5H,6H2,(H2,10,12)