CAS No.131-27-1,2-Amino-4,8-naphthalenedisulfonic acid Suppliers

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Basic Information

Molecular Structure:
CAS No.:	131-27-1
Name:	2-Amino-4,8-naphthalenedisulfonic acid
Article Data:	16

Formula:	C₁₀H₉NO₆S₂
Molecular Weight:	303.317
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;
EINECS:	205-020-5
Density:	1.769 g/cm³
Boiling Point:	205.8°C (rough estimate)
Risk Codes:	36/37/38
Safety:	26-36/37/39
PSA:	151.52000
LogP:	3.65820

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

Conditions	Yield
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

Conditions	Yield
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

Conditions	Yield
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

Conditions	Yield
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

Conditions	Yield
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

Conditions	Yield
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

Conditions	Yield
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

Conditions	Yield
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

Conditions	Yield
With sodium carbonate

: 131-27-1
3-amino-1,5-naphthalenedisulfonic acid

: 603-80-5
3-hydroxy 2-methylbenzoic acid

Conditions

Conditions	Yield
With sodium hydroxide at 250 - 275℃;

Raw Materials

91-20-3

Downstream Products

91-59-8

603-80-5

24487-91-0

86-60-2

6654-64-4

55289-06-0

573-64-8

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Chemistry

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

Production

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

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.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

An eye irritant. See also SULFONATES. When heated to decomposition it emits very toxic fumes of NO_x and SO_x.
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.