842-18-2 Usage
Chemical Properties
Moist paste
Uses
7-Hydroxy-1,3-naphthalenedisulfonic acid is a coupling component used to prepare heterocyclic monoazo dyes.
Check Digit Verification of cas no
The CAS Registry Mumber 842-18-2 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,4 and 2 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 842-18:
(5*8)+(4*4)+(3*2)+(2*1)+(1*8)=72
72 % 10 = 2
So 842-18-2 is a valid CAS Registry Number.
InChI:InChI=1/C10H8O7S2/c11-7-2-1-6-3-8(18(12,13)14)5-10(9(6)4-7)19(15,16)17/h1-5,11H,(H,12,13,14)(H,15,16,17)/p-2