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2-Amino-4,8-naphthalenedisulfonic acid
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Name

2-Amino-4,8-naphthalenedisulfonic acid

 EINECS 205-020-5
CAS No. 131-27-1 Density 1.769 g/cm3
PSA 151.52000 LogP 3.65820
Solubility N/A Melting Point N/A
Formula C10H9NO6S2 Boiling Point 205.8°C (rough estimate)
Molecular Weight 303.317 Flash Point N/A
Transport Information N/A Appearance N/A
Safety 26-36/37/39 Risk Codes 36/37/38
Molecular Structure Molecular Structure of 131-27-1 (2-Amino-4,8-naphthalenedisulfonic acid) Hazard Symbols N/A
Synonyms

2-Naphthylamine-4,8-disulfonic acid;3-Amino-1,5-naphthalenedisulfonicacid;4,8-Disulfo-2-naphthylamine;7-Amino-1,5-naphthalenedisulfonic acid;C acid;NSC 7558;b-Naphthylamine-4,8-disulfonic acid;3-Aminonaphthalene-1,5-Disulphonic Acid;

Article Data 16

2-Amino-4,8-naphthalenedisulfonic acid Synthetic route

3-nitro-naphthalene-disulfonic acid-(1.5)

3-nitro-naphthalene-disulfonic acid-(1.5)

131-27-1

3-amino-1,5-naphthalenedisulfonic acid

Conditions
ConditionsYield
With iron; acetic acid
91-20-3

naphthalene

A

131-27-1

3-amino-1,5-naphthalenedisulfonic acid

B

4-amino-naphthalene-disulfonic acid-(1.5); 8-amino-naphthalene-disulfonic acid-(1.6)

4-amino-naphthalene-disulfonic acid-(1.5); 8-amino-naphthalene-disulfonic acid-(1.6)

Conditions
ConditionsYield
With sulfuric acid at 30 - 40℃; anschl. Nitrieren mit konz. Salpetersaeure bei 15-20grad und Reduzieren mit Eisen und Salzsaeure;
117-86-2

3-nitro naphthalene-1,5-disulphonic acid

131-27-1

3-amino-1,5-naphthalenedisulfonic acid

Conditions
ConditionsYield
With sodium sulfide; sulfuric acid In water at 45℃; for 12h; Temperature;
With iron(III) oxide; hydrazine hydrate at 70 - 80℃; for 8h;225 g
91-20-3

naphthalene

131-27-1

3-amino-1,5-naphthalenedisulfonic acid

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: sulfuric acid / 30 °C
2: nitric acid / 6 h / 25 - 30 °C
3: iron(III) oxide; hydrazine hydrate / 8 h / 70 - 80 °C
View Scheme
6375-47-9

3-amino-4-methoxyacetanilide

131-27-1

3-amino-1,5-naphthalenedisulfonic acid

3-(2-acetylamino-4-amino-5-methoxyphenylazo)naphthalene-1,5-disulfonic acid disodium salt

Conditions
ConditionsYield
Stage #1: 3-amino-1,5-naphthalenedisulfonic acid With sodium carbonate In water pH=6;
Stage #2: With hydrogenchloride; sodium nitrite at 0 - 5℃; for 1h; pH=2;
Stage #3: 3-amino-4-methoxyacetanilide In water at 20℃; pH=4 - 6; Further stages.;		91%
34177-11-2

3-chloro-5,6-diphenyl-1,2,4-triazine

131-27-1

3-amino-1,5-naphthalenedisulfonic acid

113258-27-8

3-(5,6-Diphenyl-[1,2,4]triazin-3-ylamino)-naphthalene-1,5-disulfonic acid

Conditions
ConditionsYield
With triethylamine In benzene for 5h; Heating;75%
3406-84-6

biphenyl-4,4'-disulfonyl chloride

131-27-1

3-amino-1,5-naphthalenedisulfonic acid

130798-67-3

3,3'-<4,4'-biphenyldiylbis(sulfonylamino)>bis(1,5-naphthalenedisulfonic acid) tetrasodium salt

Conditions
ConditionsYield
With pyridine for 5h; Heating;56%
30418-59-8

3-Aminophenylboronic acid

131-27-1

3-amino-1,5-naphthalenedisulfonic acid

3-(4-amino-2-boronophenylazo)-1,5-naphthalenedisulfonic acid disodium salt

Conditions
ConditionsYield
Stage #1: 3-amino-1,5-naphthalenedisulfonic acid With hydrogenchloride; sodium nitrite for 0.25h; cooling;
Stage #2: 3-Aminophenylboronic acid With sodium hydroxide at 0 - 20℃; for 4h; Further stages.;		10%
75-44-5

phosgene

131-27-1

3-amino-1,5-naphthalenedisulfonic acid

3,3'-ureylene-bis-naphthalene-1,5-disulfonic acid

Conditions
ConditionsYield
With sodium carbonate
131-27-1

3-amino-1,5-naphthalenedisulfonic acid

603-80-5

3-hydroxy 2-methylbenzoic acid

Conditions
ConditionsYield
With sodium hydroxide at 250 - 275℃;

2-Amino-4,8-naphthalenedisulfonic acid Chemical Properties

Chemical Name: 2-Amino-4,8-naphthalenedisulfonic acid
IUPAC NAME: 3-aminonaphthalene-1,5-disulfonic acid
CAS No.: 131-27-1
EINECS: 205-020-5
Molecular Formula: C10H9NO6S2
Molecular Weight: 303.31 g/mol
Density: 1.769 g/cm3
Following is the structure of 3-AMINO-1,5-NAPHTHALENEDISULFONIC ACID (131-27-1):

                 
The chemical synonymous of 3-AMINO-1,5-NAPHTHALENEDISULFONIC ACID (131-27-1) are 2-Ethylamino-4,8-dinaphthalene ; 2-Ethylamino-4,8-dinaphthalenedisulfonicacid ; 3-amino-1,5-naphthalenedisulfonic ; 3-amino-5-naphthalenedisulfonicacid ; 3-aminonaphthalene-1,5-disulphonicacid ; 4,8-disulfo-2-naphthalamine ; 5-Naphthalenedisulfonicacid,3-amino-1 ; acidiv

2-Amino-4,8-naphthalenedisulfonic acid Production

Product Categories about 3-AMINO-1,5-NAPHTHALENEDISULFONIC ACID (131-27-1) are Intermediates of Dyes and Pigments.

2-Amino-4,8-naphthalenedisulfonic acid Toxicity Data With Reference

1.    

eye-rbt 100 mg/24H MOD

     28ZPAK    Sbornik Vysledku Toxixologickeho Vysetreni Latek A Pripravku Marhold, J.V.,Institut Pro Vychovu Vedoucicn Pracovniku Chemickeho Prumyclu Praha,Czechoslovakia.: 1972,189.
2.    

orl-rat LD50:11,400 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-Amino-4,8-naphthalenedisulfonic acid Consensus Reports

Reported in EPA TSCA Inventory.

2-Amino-4,8-naphthalenedisulfonic acid Safety Profile

An eye irritant. See also SULFONATES. When heated to decomposition it emits very toxic fumes of NOx and SOx.
Risk Statements about 3-AMINO-1,5-NAPHTHALENEDISULFONIC ACID (131-27-1):
    R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements about 3-AMINO-1,5-NAPHTHALENEDISULFONIC ACID (131-27-1):
    S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
    S36/37/39: Wear suitable protective clothing, gloves and eye/face protection.
 

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