129-93-1

Basic information

• Product Name: 6,8-dianilinonaphthalene-1-sulphonic acid
• Synonyms: 6,8-dianilinonaphthalene-1-sulphonic acid;6,8-bis(phenylamino)naphthalene-1-sulfonic acid;6,8-Dianilino-1-naphthalenesulfonic acid;1,3-Bis(phenylamino)-8-naphthalenesulfonic acid;1,3-Bis(phenylamino)naphthalene-8-sulfonic acid;6,8-Bis(phenylamino)-1-naphthalenesulfonic acid;Diphenyl epsilon acid;6,8-bis(anilino)naphthalene-1-sulfonic acid
• CAS NO: 129-93-1
• Molecular Formula: C₂₂H₁₈N₂O₃S
• Molecular Weight: 390.45492
• EINECS: 204-970-8
• Mol File: 129-93-1.mol
• Article Data: 0

Chemical Properties

• Appearance: /
• Density: 1.402 g/cm³
• Refractive Index: 1.732
• CAS DataBase Reference: 6,8-dianilinonaphthalene-1-sulphonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 6,8-dianilinonaphthalene-1-sulphonic acid(129-93-1)
• EPA Substance Registry System: 6,8-dianilinonaphthalene-1-sulphonic acid(129-93-1)

Safety Data

• Hazardous Substances Data: 129-93-1(Hazardous Substances Data)

Usage

General Description

6,8-dianilinonaphthalene-1-sulphonic acid is a chemical compound with the formula C20H15NO3S. It is an aromatic compound that features two aniline groups and a naphthalene backbone with a sulfonic acid group attached to the 1-position. 6,8-dianilinonaphthalene-1-sulphonic acid is often used as a fluorescence probe in biological and chemical studies due to its strong fluorescent properties. It is also used as a pH indicator and in the production of dyes and pigments. Additionally, 6,8-dianilinonaphthalene-1-sulphonic acid is used in research and analytical applications to detect and measure the presence of certain compounds in various substances.

InChI:InChI=1/C22H18N2O3S/c25-28(26,27)21-13-7-8-16-14-19(23-17-9-3-1-4-10-17)15-20(22(16)21)24-18-11-5-2-6-12-18/h1-15,23-24H,(H,25,26,27)

Synthetic route

1-naphthylamine-3,8-disulfonic acid (129-91-9) + aniline hydrochloride (142-04-1) + aniline (62-53-3) → 6,8-dianilino-naphthalene-1-sulfonic acid (129-93-1)

Conditions	Yield
at 150 - 170℃;

1-naphthylamine-3,8-disulfonic acid (129-91-9) + aniline (62-53-3) → 6,8-dianilino-naphthalene-1-sulfonic acid (129-93-1)

Conditions	Yield
With aniline hydrochloride at 150 - 170℃;

6,8-dianilino-naphthalene-1-sulfonic acid (129-93-1) + benzene diazonium chloride (100-34-5) → 5-anilino-benzo[a]phenazine-4-sulfonic acid

Conditions	Yield
With ethanol Reduktion des enstandenen Azofarbstoffes mit Eisen oder Zinkstaub und nachfolgenden Einleiten von Luft in die mit Ammoniak versetzte Reaktions-Loesung;
With acetic acid Reduktion des enstandenen Azofarbstoffes mit Eisen oder Zinkstaub und nachfolgenden Einleiten von Luft in die mit Ammoniak versetzte Reaktions-Loesung;

copper(ll) sulfate pentahydrate + ethanol (64-17-5) + 4,4'-diaminodiphenylamine-2'-sulfonic acid (119-70-0) + 6,8-dianilino-naphthalene-1-sulfonic acid (129-93-1) → phenazin-1-ylamine (2876-22-4)

Conditions	Yield
With ammonia; sodium carbonate In water

Upstream product

• 129-91-9 1-naphthylamine-3,8-disulfonic acid 
• 62-53-3 aniline 
• 142-04-1 aniline hydrochloride 

Downstream Products

• 2876-22-4 phenazin-1-ylamine