Product Name

  • Name

    Acid Orange 7

  • EINECS 211-199-0
  • CAS No. 633-96-5
  • Article Data3
  • CAS DataBase
  • Density 1.525[at 20℃]
  • Solubility 116 g/L (30 °C) in water
  • Melting Point 164 °C
  • Formula C16H11N2NaO4S
  • Boiling Point
  • Molecular Weight 350.33
  • Flash Point
  • Transport Information
  • Appearance Orange-red powder
  • Safety 26-36-37/39
  • Risk Codes 36/37/38
  • Molecular Structure Molecular Structure of 633-96-5 (Acid Orange 7)
  • Hazard Symbols IrritantXi
  • Synonyms Acid Orange A (6CI);Benzenesulfonic acid, 4-[(2-hydroxy-1-naphthalenyl)azo]-,monosodium salt (9CI);Benzenesulfonic acid, p-(2-hydroxy-1-naphthylazo)-, sodium salt (6CI);11550Orange;AO 7;Acid LeatherOrange extra;Acid Orange II;Amacid Orange Y Conc;BTK Orange II;Basacid Orange 280;Betanaphtholorange;Borunil Orange A 2R;Bucacid Orange A;C Ext. Orange8;C.I. 15510;Calcocid Orange Y;Certiqual Orange II;Colocid Orange II;Conacid Orange L;Covalene Orange II;CurolOrange;D and C Orange 4 Aluminum Lake;Daedo Acid Orange 2G;Derma Fur Orange R 125;Diacid Orange II;Dyacid Orange II;Dycosacid Orange Yellow II;Eniacid OrangeII;Erio Orange II;Fenazo Orange;Japan Orange 205;Japan Orange No. 205;Java Orange II;Kromon Lake Orange Toner;Lake Orange A;Libacid Orange LII;Lurazol Orange E;Multicuer Orange II;Naphthalene Orange G;Naphthol RedJ;Naphtocard Orange II;Neklacid Orange II;No. 177 OrangeLake;Nubilon Orange R;Orange 2;Orange II;
  • PSA 110.53000
  • LogP 4.94570

Synthetic route

β-naphthol
135-19-3

β-naphthol

4-aminobenzene sulfonic acid
121-57-3

4-aminobenzene sulfonic acid

orange II
633-96-5

orange II

Conditions
ConditionsYield
Stage #1: 4-aminobenzene sulfonic acid With sodium nitrite In water; N,N-dimethyl-formamide at 25℃;
Stage #2: With hydrogenchloride In water; N,N-dimethyl-formamide
Stage #3: β-naphthol In water; N,N-dimethyl-formamide at 25℃; for 0.00805556h;		94.74%
Stage #1: 4-aminobenzene sulfonic acid With water; sodium nitrite In neat (no solvent) at 20℃;
Stage #2: β-naphthol In neat (no solvent) at 20℃; for 0.333333h;		83%
With sodium nitrite at 0℃; Neat (no solvent);25%
C14H12F2N4O2*Ag(1+)*NO3(1-)

C14H12F2N4O2*Ag(1+)*NO3(1-)

orange II
633-96-5

orange II

C14H12F2N4O2*Ag(1+)*0.85NO3(1-)*0.15C16H11N2O4S(1-)

C14H12F2N4O2*Ag(1+)*0.85NO3(1-)*0.15C16H11N2O4S(1-)

Conditions
ConditionsYield
In water for 0.25h;97%
C14H12F2N4O2*Ag(1+)*NO3(1-)

C14H12F2N4O2*Ag(1+)*NO3(1-)

orange II
633-96-5

orange II

C14H12F2N4O2*Ag(1+)*0.1NO3(1-)*0.9C16H11N2O4S(1-)

C14H12F2N4O2*Ag(1+)*0.1NO3(1-)*0.9C16H11N2O4S(1-)

Conditions
ConditionsYield
In water for 0.25h;96%
orange II
633-96-5

orange II

silver carbonate

silver carbonate

C16H11N2O4S(1-)*Ag(1+)

C16H11N2O4S(1-)*Ag(1+)

Conditions
ConditionsYield
Stage #1: orange II With nitric acid In water Inert atmosphere;
Stage #2: silver carbonate In water at 60℃; for 0.5h; Temperature; Inert atmosphere; Darkness;		88.4%
orange II
633-96-5

orange II

carbetapentane citrate

carbetapentane citrate

C20H31NO3*C16H11N2O4S(1-)*C6H8O7*Na(1+)

C20H31NO3*C16H11N2O4S(1-)*C6H8O7*Na(1+)

Conditions
ConditionsYield
In water; acetic acid pH=2.6;
orange II
633-96-5

orange II

A

1-amino-2-naphthol
2834-92-6

1-amino-2-naphthol

B

4-aminobenzene sulfonic acid
121-57-3

4-aminobenzene sulfonic acid

Conditions
ConditionsYield
With sodium disulfite; borohydride at 25℃; pH=5.6; Reduction;
With iron In various solvent(s) pH=7.0; Kinetics; Reduction;
orange II
633-96-5

orange II

aqueous sodium hydrogen sulfite

aqueous sodium hydrogen sulfite

2-hydroxy-1-<N'-(4-sulfo-phenyl)-hydrazino>-naphthalene-sulfonic acid-(4)

2-hydroxy-1-<N'-(4-sulfo-phenyl)-hydrazino>-naphthalene-sulfonic acid-(4)

orange II
633-96-5

orange II

sodium hypochlorite

sodium hypochlorite

hydrochloric acid

hydrochloric acid

A

4-diazobenzenesulfonic acid
305-80-6

4-diazobenzenesulfonic acid

B

isonaphthazarine
605-37-8

isonaphthazarine

C

3.4-dichloro-1.2-dioxo-tetralin

3.4-dichloro-1.2-dioxo-tetralin

Conditions
ConditionsYield
at 5℃;
...Expand
orange II
633-96-5

orange II

NaHSO3

NaHSO3

A

1-amino-2-naphthol-4-sulfonic acid
116-63-2

1-amino-2-naphthol-4-sulfonic acid

B

4-aminobenzene sulfonic acid
121-57-3

4-aminobenzene sulfonic acid

Conditions
ConditionsYield
bei folgendem Ansaeuern mit Salzsaeure;
...Expand
orange II
633-96-5

orange II

NaHSO3

NaHSO3

acidic sulfurous acid ester of 2-phenylhydrazino-2-oxy-1-<4-sulfo-phenylhydrazino>-1.2-dihydro-naphthalene

acidic sulfurous acid ester of 2-phenylhydrazino-2-oxy-1-<4-sulfo-phenylhydrazino>-1.2-dihydro-naphthalene

Conditions
ConditionsYield
beim Zufuegen von Phenylhydrazin und weiteren Erwaermen;
orange II
633-96-5

orange II

aqueous hydrochloric acid

aqueous hydrochloric acid

A

2-Hydroxy-1,4-naphthoquinone
83-72-7

2-Hydroxy-1,4-naphthoquinone

B

4-aminobenzene sulfonic acid
121-57-3

4-aminobenzene sulfonic acid

C

ammonium chloride

ammonium chloride

...Expand
orange II
633-96-5

orange II

A

p-hydoroxybenzenesulfonic acid
98-67-9

p-hydoroxybenzenesulfonic acid

B

1,2-naphthoquinone
524-42-5

1,2-naphthoquinone

Conditions
ConditionsYield
With ethylenediaminetetraacetic acid; dihydrogen peroxide; ferric nitrate In water for 0.166667h; pH=7;
cetyltrimethylammonim bromide
57-09-0

cetyltrimethylammonim bromide

orange II
633-96-5

orange II

C16H11N2O4S(1-)*C19H42N(1+)

C16H11N2O4S(1-)*C19H42N(1+)

Conditions
ConditionsYield
In chloroform; water pH=5; aq. acetate buffer;
orange II
633-96-5

orange II

4-amino-1,2-naphthoquinone
5460-35-5

4-amino-1,2-naphthoquinone

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
View Scheme
Multi-step reaction with 2 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
View Scheme
orange II
633-96-5

orange II

4-(4-(dimethylamino)benzylideneamino)naphthalene-1,2-dione
1386994-19-9

4-(4-(dimethylamino)benzylideneamino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: acetic acid / ethanol; methanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: acetic acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

4-(3,4,5-trimethoxybenzylideneamino)naphthalene-1,2-dione
1386994-20-2

4-(3,4,5-trimethoxybenzylideneamino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: acetic acid / ethanol; methanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: acetic acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

4-(3,4-dimethoxybenzylideneamino)naphthalene-1,2-dione
1386994-21-3

4-(3,4-dimethoxybenzylideneamino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: acetic acid / ethanol; methanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: acetic acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

4-(2-nitrobenzylideneamino)naphthalene-1,2-dione
1386994-22-4

4-(2-nitrobenzylideneamino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: acetic acid / ethanol; methanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: acetic acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

4-(4-hydroxy-3-methoxybenzylideneamino)naphthalene-1,2-dione
1386994-23-5

4-(4-hydroxy-3-methoxybenzylideneamino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: acetic acid / ethanol; methanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: acetic acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

4-(2-hydroxybenzylideneamino)naphthalene-1,2-dione
1386994-24-6

4-(2-hydroxybenzylideneamino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: acetic acid / ethanol; methanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: acetic acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

4-((1H-indol-3-yl)methyleneamino)naphthalene-1,2-dione
1386994-25-7

4-((1H-indol-3-yl)methyleneamino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: acetic acid / ethanol; methanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: acetic acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

4-((3-phenylallylidene)amino)naphthalene-1,2-dione
1386994-26-8

4-((3-phenylallylidene)amino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: acetic acid / ethanol; methanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: acetic acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

4-(cyclohexylideneamino)naphthalene-1,2-dione
1386994-27-9

4-(cyclohexylideneamino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: sulfuric acid / ethanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: sulfuric acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

4-(cyclopentylideneamino)naphthalene-1,2-dione
1386994-28-0

4-(cyclopentylideneamino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: sulfuric acid / ethanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: sulfuric acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

4-(benzylideneamino)naphthalene-1,2-dione
1386994-11-1

4-(benzylideneamino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: acetic acid / ethanol; methanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: acetic acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

4-(4-nitrobenzylideneamino)naphthalene-1,2-dione
1386994-12-2

4-(4-nitrobenzylideneamino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: acetic acid / ethanol; methanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: acetic acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

1,2-naphthoquinone
524-42-5

1,2-naphthoquinone

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
View Scheme
Stage #1: orange II With sodium dithionite at 40 - 50℃;
Stage #2: With hydrogenchloride; iron(III) chloride In water Cooling with ice;
orange II
633-96-5

orange II

4-(2,4-dichlorobenzylideneamino)naphthalene-1,2-dione
1386994-13-3

4-(2,4-dichlorobenzylideneamino)naphthalene-1,2-dione

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: sodium dithionite / 40 - 50 °C
2: iron(III) chloride; hydrogenchloride / Cooling with ice
3: sodium azide / water; acetic acid / 2 h / 40 °C
4: acetic acid / ethanol; methanol / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: sodium dithionite / 40 - 50 °C
1.2: Cooling with ice
2.1: sodium azide; acetic acid / water / 40 °C
3.1: acetic acid / ethanol / Reflux
View Scheme
orange II
633-96-5

orange II

1-aminonaphthalene-2-ol hydrochloride
1198-27-2

1-aminonaphthalene-2-ol hydrochloride

Conditions
ConditionsYield
Stage #1: orange II With sodium dithionite at 40 - 50℃;
Stage #2: With hydrogenchloride; tin(ll) chloride In water

Acid Orange 7 Chemical Properties

Product Name: Acid Orange 7 (CAS NO.633-96-5)

Molecular Formula: C16H11N2NaO4S
Molecular Weight: 350.32g/mol
Mol File: 633-96-5.mol
EINECS: 211-199-0
Appearance: Orange-red powder
Melting Point: 164 °C
Water Solubility: 116 g/L (30 °C)
H-Bond Donor: 1
H-Bond Acceptor: 6
Structure Descriptors of Acid Orange 7 (CAS NO.633-96-5):
  IUPAC Name: sodium 4-[(2E)-2-(2-oxonaphthalen-1-ylidene)hydrazinyl]benzenesulfonate
  Canonical SMILES: C1=CC=C2C(=C1)C=CC(=O)C2=NNC3=CC=C(C=C3)S(=O)(=O)[O-].[Na+]
  Isomeric SMILES: C1=CC=C\2C(=C1)C=CC(=O)/C2=N/NC3=CC=C(C=C3)S(=O)(=O)[O-].[Na+]
  InChI: InChI=1S/C16H12N2O4S.Na/c19-15-10-5-11-3-1-2-4-14(11)16(15)18-17-12-6-8-13(9-7-12)23(20,21)22;/h1-10,17H,(H,20,21,22);/q;+1/p-1/b18-16+; 
  InChIKey: IGQFKZCLTLAWLO-HYNBPGMHSA-M
Product Categories: Organics

Acid Orange 7 Uses

 Acid Orange 7 (CAS NO.633-96-5) is one of the most common dyes used for wool, silk, paper, etc. It is also used as indicator and biological colourants.

Acid Orange 7 Toxicity Data With Reference

1.    

msc-hmn:lyms 12 nmol/L

     MUREAV    Mutation Research. 249 (1991),265.

Acid Orange 7 Consensus Reports

Reported in EPA TSCA Inventory.

Acid Orange 7 Safety Profile

The safety information of Acid Orange 7 (CAS NO.633-96-5) is as follows:
Hazard Codes:Xi
Risk Statements:36/37/38
36/37/38:Irritating to eyes, respiratory system and skin
Safety Statements:26-36-37/39
26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36:Wear suitable protective clothing
37/39:Wear suitable gloves and eye/face protection
WGK Germany:3
RTECS:DB7084000
Experimental reproductive effects. Mutation data reported. When heated to decomposition it emits toxic vapors of NOx and SOx.

Acid Orange 7 Specification

 Acid Orange 7 , its CAS NO. is 633-96-5, the synonyms are 4-((2-Hydroxy-1-naphthalenyl)azo)benzenesulfonic acid,
monosodium salt ; Acid orange ii ; Benzenesulfonic acid, 4-((2-hydroxy-1-naphthalenyl)azo)-, monosodium salt ; D & C Orange no. 4 ; Orange II ; 1-p-Sulfophenylazo-2-naphthol, monosodium salt ; 2-Naphthol Orange II ; 4-((2-Hydroxy-1-naphthyl)azo)benzenesulfonic acid, sodium salt ; Acid Leather Orange Extra .

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