1-Amino-8-naphthol-4,6-disulfonic acid supplier

Name
1-Amino-8-naphthol-4,6-disulfonic acid
EINECS 204-982-3
CAS No. 130-23-4
Article Data4
CAS DataBase
Density 1.88 g/cm³
Solubility 20g/L at 26.4℃
Melting Point
Formula C₁₀H₉NO₇S₂
Boiling Point
Molecular Weight 319.316
Flash Point
Transport Information
Appearance light brown powder
Safety
Risk Codes R41
Molecular Structure
Hazard Symbols Xi,T
Synonyms 1-Naphthol-3,5-disulfonicacid, 8-amino- (6CI);1-Amino-8-hydroxynaphthalene-4,6-disulfonic acid;1-Amino-8-naphthol-4,6-disulfonic acid;4-Amino-5-hydroxy-1,7-naphthalenedisulfonic acid;4-Amino-5-naphthol-1,7-disulfonic acid;8-Amino-1-hydroxy-3,5-naphthalenedisulfonic acid;8-Amino-1-naphthol-3,5-disulfonic acid;K acid;NSC 7110;
PSA 171.75000
LogP 3.36380

Synthetic route

: 17894-99-4
8-amino-naphthalene-1,3,5-trisulfonic acid

: furan-2,3,5(4H)-trione pyridine (1:1)

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

Conditions

Conditions	Yield
at 170 - 175℃; unter Druck;

: 17894-99-4
8-amino-naphthalene-1,3,5-trisulfonic acid

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

Conditions

Conditions	Yield
With alkali hydroxide at 150 - 220℃;

: 90-20-0
4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 141236-48-8, 35418-05-4
3-nitrocinnamoyl chloride

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: N,N'-bis-{3-[2-(8-hydroxy-4,6-disulfo-[1]naphthylcarbamoyl)-vinyl]-phenyl}-urea

Conditions

Conditions	Yield
Reduktion und Behandlung des Reaktionsprodukts mit Phosgen bei Gegenwart von Natriumacetat in waessr. Loesung;

: 14368-49-1
p-nitrobenzenediazonium

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 3,4-diamino-5-hydroxy-naphthalene-1,7-disulfonic acid

Conditions

Conditions	Yield
With acid Reduktion des Farbstoffs mit Zinn oder Zinn(II)-chlorid in Salzsaeure;

: 5957-03-9
Diphenyl-4,4'-bis-diazonium

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 123726-98-7
4,4'-diamino-5,5'-dihydroxy-6,6'-biphenyl-4,4'-diyl-bis-azo-bis-naphthalene-1,7-disulfonic acid

Conditions

Conditions	Yield
With sodium carbonate

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 100-05-0
4-nitrobenzenediazonium chloride

: 3,4,6-triamino-5-hydroxy-naphthalene-1,7-disulfonic acid

Conditions

Conditions	Yield
nachf. Kuppeln mit Benzoldiazoniumchlorid in saurer und alkal. Loesung und Reduktion des entst. Bisazofarbstoffs mit Zinn(II)-chlorid und konz. Salzsaeure;

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 100-05-0
4-nitrobenzenediazonium chloride

: 4-amino-8-(4-amino-phenylazo)-5-hydroxy-naphthalene-1,7-disulfonic acid

Conditions

Conditions	Yield
With acid und Reduzieren des Reaktionsprodukts mit Natriumsulfid;

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 5-amino-2,3,6,8-tetrabromo-[1,4]naphthoquinone

Conditions

Conditions	Yield
With sulfuric acid; bromine; acetic acid

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 4-chloro-5-hydroxy-naphthalene-1,7-disulfonic acid

Conditions

Conditions	Yield
durch Austausch von NH2 gegen Cl nach dem Sandmeyerschen Verfahren;

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 8-hydroxy-4,6-disulfo-naphthalene-1-diazonium-betaine

Conditions

Conditions	Yield
Diazotization;

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 98-88-4
benzoyl chloride

: 4-benzoylamino-5-benzoyloxy-naphthalene-1,7-disulfonic acid

Conditions

Conditions	Yield
With alkali

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 122-04-3
4-nitro-benzoyl chloride

: 5,5'-dihydroxy-4,4'-(4,4'-ureylene-bis-benzoylamino)-bis-naphthalene-1,7-disulfonic acid

Conditions

Conditions	Yield
Reduktion und Behandlung des Reaktionsprodukts mit Phosgen bei Gegenwart von Natriumacetat in waessr. Loesung;

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: sodium hydrogensulfite

: 100-63-0
phenylhydrazine

: 5-hydroxy-4-phenylazo-naphthalene-1,7-disulfonic acid

Conditions

Conditions	Yield
nachf. Verseifen mit Alkalien unter Durchleiten von Luft;

...Expand

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

disulfite: disulfite

: 23894-06-6
4,5-dihydroxy-naphthalene-1,7-disulfonic acid

Conditions

Conditions	Yield
With water

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

diazotized 2-methyl-4-ethyl-aniline: diazotized 2-methyl-4-ethyl-aniline

: 3-(4-ethyl-2-methyl-phenylazo)-5-amino-4-hydroxy-naphthalene-2,7-disulfonic acid

Conditions

Conditions	Yield
With sodium carbonate

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 6361-49-5
1-benzoylamino-8-hydroxynaphthalene-4,6-disulfonic acid

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: alkali 2: aqueous-alcoholic NaOH-solution View Scheme

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 4,5-dihydroxy-naphthalene-2-sulfonic acid

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: water 2: concentrated hydrochloric acid View Scheme

: 1,5-disulphonaphthalene-2-diazonium chloride

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: C20H15N3O13S4

: diazo 4-sulfatoethylsulfone-1-aminobenzene

: C10H13N2O8S2(1+)*Cl(1-)

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 90-20-0
4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid

A: C18H17N3O12S4

B: 131413-68-8
C18H17N3O12S4

C: C20H21N3O14S4

D: C20H21N3O14S4

Conditions

Conditions	Yield
With sodium hydrogencarbonate at 25℃; pH=1 - 1.3;

...Expand

: 108-77-0
1,3,5-trichloro-2,4,6-triazine

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 1-(4,6-dichloro-1,3,5-triazin-2-yl)-amino-8-hydroxynaphthalene-4,6-disulfonic acid

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 853112-89-7
C27H21N3O16S5

Conditions

Conditions	Yield
Stage #1: C17H15NO9S3 With hydrogenchloride; sodium carbonate; sodium nitrite In water at 0 - 5℃; pH=6.0 - 8.0; Stage #2: 4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid In water at 10 - 20℃; for 4h; pH=2.4 - 2.8;

: 108-77-0
1,3,5-trichloro-2,4,6-triazine

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: dichlorotriazinylamino-8-naphtholdisulfonic acid

: 64-17-5
ethanol

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 22952-27-8
4-nitro-2-sulfo-benzoic acid-anhydride

: 5-hydroxy-4-(4-nitro-2-sulfobenzamido)-1,7-naphthalenedisulfonic acid trisodium salt

Conditions

Conditions	Yield
With hydrogenchloride; sodium hydroxide; sodium acetate; sodium acetate trihydrate In water

...Expand

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 64688-68-2
2-methyl-5-nitrobenzoyl chloride

: 5-hydroxy-4-(5-nitro-o-toluamido)-1,7-naphthalenedisulfonic acid, disodium salt

Conditions

Conditions	Yield
With sodium acetate trihydrate In water

: 130-23-4
4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

: 1955-04-0
methyl 5-nitro-3-chloroformylbenzoate

: N-(8-hydroxy-4,6-disulfo-1-naphthyl)-5-nitroisophthalamic acid disodium salt

Conditions

Conditions	Yield
With sodium acetate trihydrate In sodium hydroxide; water

1-Amino-8-naphthol-4,6-disulfonic acid Specification

The 1-Amino-8-naphthol-4,6-disulfonic acid ,its cas register number is 130-23-4.It also can be called as l,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy- and the IUPAC name about this chemical is 4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid .It belongs to the Intermediates of Dyes and Pigments. Raw materials is 1-Naphthylamine-4,6,8-trisulfonic acid .

Following are the chemical properties about 1-Amino-8-naphthol-4,6-disulfonic acid :(1)#H bond acceptors: 8 ; (2)#H bond donors: 5 ; (3)#Freely Rotating Bonds: 4 ; (4)Polar Surface Area: 115.97 Å² ; (5)Index of Refraction: 1.764 ; (6)Molar Refractivity: 70.15 cm³ ; (7)Molar Volume: 169.8 cm³ ; (8)Polarizability: 27.81x10^-24cm³ ; (9)Surface Tension: 104.7 dyne/cm

The 1-Amino-8-naphthol-4,6-disulfonic acid is a light brown powder, it slightly soluble in cold water and soluble in hot water, also it can soluble in soda ash or caustic soda solution, after react with ferric chloride it will be yellow green.It can be used as azo dyes, reactive dyes and organic pigment intermediates, mainly used for the production of cationic dyes, reactive red K-2G and so on.

Preparition methods: The 1-Amino-8-naphthol-4,6-disulfonic acid can be got from the 1-naphthylamine-4,6,8-3 acid by neutralization, alkali, acidification. The 1-naphthylamine-4,6,8-3 acid solution with sodium carbonate and sodium were naphthylamine 3, then at 178-184 °C under liquid alkali fusion with sodium hydroxide; then use sulfuric acid in the 0.7- 0.78MPa obtained under acid 4h. The finished product is rice brown powder, K acid content of 80%.

This chemical can be described computed from structure:
(1)Canonical SMILES: C1=CC(=C2C=C(C=C(C2=C1N)O)S(=O)(=O)O)S(=O)(=O)O
(2)InChI: InChI=1S/C10H9NO7S2/c11-7-1-2-9(20(16,17)18)6-3-5(19(13,14)15)4-8(12)10(6)7/h1-4,12H,11H2,(H,13,14,15)(H,16,17,18)
(3)InChIKey: ZUQOBHTUMCEQBG-UHFFFAOYSA-N

Product Name

1-Amino-8-naphthol-4,6-disulfonic acid

Synthetic route

1-Amino-8-naphthol-4,6-disulfonic acid Specification

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