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Name	2-Naphthylamine-5,7-disulfonic acid	EINECS	204-246-1
CAS No.	118-33-2	Density	1.77 g/cm³
PSA	151.52000	LogP	3.65820
Solubility	229g/L at 15℃	Melting Point	N/A
Formula	C₁₀H₉NO₆S₂	Boiling Point	568.34℃[at 101 325 Pa]
Molecular Weight	303.317	Flash Point	N/A
Transport Information	UN 1759	Appearance	N/A
Safety		Risk Codes	N/A
Molecular Structure		Hazard Symbols	N/A
Synonyms	6-aminonaphthalene-1,3-disulfonic acid;2-Amino-5, 7-naphthalenedisulfonic acid;2-Naphthylamine, 5,7-disulfo-;Kyselina amino-i;.beta.-Naphthylamine-5,7-disulfonic acid;6-AMINO-NAPHTHALENE-1,3-DISULFONIC ACID;Naphthalene-1,3-disulfonic acid, 6-amino-;6-Amino-1, 3-naphthalenedisulfonic acid;Amino-J-acid;Amino-I acid;1,3-Naphthalenedisulfonic acid,6-amino-;2-Aminonaphthalene-5,7-disulfonic acid;6-Amino-1,3-naphthalenedisulfonic acid;2-Naphthylamine-5, 7-disulfonic acid;2-Naftylamin-5,7-disulfonan sodny;Amino-J acid;1, 3-Naphthalenedisulfonic acid, 6-amino-;	Article Data	14

2-Naphthylamine-5,7-disulfonic acid Synthetic route

: 81-05-0
6-aminonaphthalene-1-sulfonic acid

A: 118-33-2
6-amino-naphthalene-1,3-disulfonic acid

B: 117-62-4
2-amino-1,5-naphthalenedisulfonic acid

Conditions

Conditions	Yield
With sulfuric acid at 20℃;
With sulfuric acid

: 55524-84-0
2-Aminonaphthalene-1,5,7-trisulfonic acid

: 118-33-2
6-amino-naphthalene-1,3-disulfonic acid

Conditions

Conditions	Yield
With mineral acid

: 7664-93-9
sulfuric acid

: 494-44-0
7-aminonaphthalene-2-sulfonic acid

A: 118-33-2
6-amino-naphthalene-1,3-disulfonic acid

B: 78887-55-5
6-amino-1,4-naphthalene disulfonic acid

C: 46968-48-3
2-Aminonaphthalene-1,7-disulfonic acid

: 91-59-8
naphthalen-2-ylamine

oleum: oleum

A: 118-33-2
6-amino-naphthalene-1,3-disulfonic acid

B: 86-65-7
2-aminonaphthalene-6,8-disulfonate

Conditions

Conditions	Yield
at 50 - 85℃; Eingiessen in Eiswasser, Filtrieren und Erhitzen des Filtrats zum Sieden;
Giessen in Eiswasser;

: 494-44-0
7-aminonaphthalene-2-sulfonic acid

A: 118-33-2
6-amino-naphthalene-1,3-disulfonic acid

B naphthylamine-(2)-disulfonic acid-(1.7); naphthylamine-(2)-disulfonic acid-(4.7): naphthylamine-(2)-disulfonic acid-(1.7); naphthylamine-(2)-disulfonic acid-(4.7)

Conditions

Conditions	Yield
With sulfuric acid

: 55524-84-0
2-Aminonaphthalene-1,5,7-trisulfonic acid

diluted mineral acid: diluted mineral acid

: 118-33-2
6-amino-naphthalene-1,3-disulfonic acid

: 7664-93-9
sulfuric acid

: 81-05-0
6-aminonaphthalene-1-sulfonic acid

A: 118-33-2
6-amino-naphthalene-1,3-disulfonic acid

B: 117-62-4
2-amino-1,5-naphthalenedisulfonic acid

: 81-16-3
2-aminonaphthalenesulfonic acid

A: 118-33-2
6-amino-naphthalene-1,3-disulfonic acid

B: 86-65-7
2-aminonaphthalene-6,8-disulfonate

Conditions

Conditions	Yield
With sulfuric acid; sulfur trioxide In water	A n/a B 9.5 %.

: 118-33-2
6-amino-naphthalene-1,3-disulfonic acid

: sodium 6-iodonaphthalene-1,3-disulfonate

Conditions

Conditions	Yield
Stage #1: 6-amino-naphthalene-1,3-disulfonic acid With hydrogenchloride; sodium nitrite In water at 0 - 5℃; Stage #2: With hydrogenchloride; sodium iodide In water at 0 - 50℃;	33%

: 75-44-5
phosgene

: 118-33-2
6-amino-naphthalene-1,3-disulfonic acid

: 104954-42-9
6,6'-ureylene-bis-naphthalene-1,3-disulfonic acid

Conditions

Conditions	Yield
With sodium carbonate

2-Naphthylamine-5,7-disulfonic acid Chemical Properties

IUPAC Name: 6-Aminonaphthalene-1,3-disulfonic acid
Synonyms : 6-Amino-1,3-naphthalenedisulfonic acid
Molecular Structure :
Molecular Formula : C₁₀H₉NO₆S₂
Molecular Weight : 303.30
CAS NO: 118-33-2
EINECS : 204-246-1
Index of Refraction: 1.733
Density: 1.769 g/cm³
Mol File: 118-33-2.mol
Appearance: 6-Aminonaphthalene-1,3-disulfonic acid (CAS NO. 118-33-2) is white shiny long prismatic needle-like crystal,
Product Categories: Intermediates of Dyes and Pigments;Anilines, Aromatic Amines and Nitro Compounds;Organic acids

2-Naphthylamine-5,7-disulfonic acid Uses

6-Aminonaphthalene-1,3-disulfonic acid (CAS NO. 118-33-2) is used for dye intermediates,mainly is the intermediates to produce J acid, double-J Acid, Phenyl J acid and scarlet acid.

2-Naphthylamine-5,7-disulfonic acid Production

Production methods: 6-Aminonaphthalene-1,3-disulfonic acid (CAS NO. 118-33-2) is derived from hydrolysis of 2 - Naphthylamine -1,5,7 - 3-sulfonic acid . put sulfuric acid, sodium sulfate and 2 - naphthylamine -1,5,7 - 3-sulfonic acid in water at 110-120 °C 4h, cooling and filtering, washing in sodium sulfate solution, filtered cake obtained , which is 6-Aminonaphthalene-1,3-disulfonic acid (CAS NO. 118-33-2).

2-Naphthylamine-5,7-disulfonic acid Toxicity Data With Reference

1.	skn-rbt 2 mg/24H SEV	85JCAE Prehled Prumyslove Toxikologie; Organicke Latky Marhold, J.,Prague, Czechoslovakia.: Avicenum,1986,1059.
2.	eye-rbt 750 µg/24H SEV	28ZPAK Sbornik Vysledku Toxixologickeho Vysetreni Latek A Pripravku Marhold, J.V.,Institut Pro Vychovu Vedoucicn Pracovniku Chemickeho Prumyclu Praha,Czechoslovakia.: 1972,189.
3.	orl-rat LD50:2000 mg/kg	28ZPAK Sbornik Vysledku Toxixologickeho Vysetreni Latek A Pripravku Marhold, J.V.,Institut Pro Vychovu Vedoucicn Pracovniku Chemickeho Prumyclu Praha,Czechoslovakia.: 1972,189.

2-Naphthylamine-5,7-disulfonic acid Consensus Reports

Reported in EPA TSCA Inventory.

2-Naphthylamine-5,7-disulfonic acid Safety Profile

RIDADR 1759
HazardClass 8
PackingGroup III

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