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Name	Acid Orange 7	EINECS	211-199-0
CAS No.	633-96-5	Density	1.525[at 20℃]
PSA	110.53000	LogP	4.94570
Solubility	116 g/L (30 °C) in water	Melting Point	164 °C
Formula	C₁₆H₁₁N₂NaO₄S	Boiling Point	N/A
Molecular Weight	350.33	Flash Point	N/A
Transport Information	N/A	Appearance	Orange-red powder
Safety	26-36-37/39	Risk Codes	36/37/38
Molecular Structure		Hazard Symbols	Xi
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;	Article Data	3

Acid Orange 7 Synthetic route

: 135-19-3
β-naphthol

: 121-57-3
4-aminobenzene sulfonic acid

: 633-96-5
orange II

Conditions

Conditions	Yield
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-)

: 633-96-5
orange II

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

Conditions

Conditions	Yield
In water for 0.25h;	97%

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

: 633-96-5
orange II

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

Conditions

Conditions	Yield
In water for 0.25h;	96%

: 633-96-5
orange II

: silver carbonate

: C16H11N2O4S(1-)*Ag(1+)

Conditions

Conditions	Yield
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%

: 633-96-5
orange II

: carbetapentane citrate

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

Conditions

Conditions	Yield
In water; acetic acid pH=2.6;

: 633-96-5
orange II

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

B: 121-57-3
4-aminobenzene sulfonic acid

Conditions

Conditions	Yield
With sodium disulfite; borohydride at 25℃; pH=5.6; Reduction;
With iron In various solvent(s) pH=7.0; Kinetics; Reduction;

: 633-96-5
orange II

aqueous sodium hydrogen sulfite: aqueous sodium hydrogen sulfite

2-hydroxy-1--naphthalene-sulfonic acid-(4): 2-hydroxy-1--naphthalene-sulfonic acid-(4)

: 633-96-5
orange II

sodium hypochlorite: sodium hypochlorite

hydrochloric acid: hydrochloric acid

A: 305-80-6
4-diazobenzenesulfonic acid

B: 605-37-8
isonaphthazarine

C 3.4-dichloro-1.2-dioxo-tetralin: 3.4-dichloro-1.2-dioxo-tetralin

Conditions

Conditions	Yield
at 5℃;

...Expand

: 633-96-5
orange II

NaHSO3: NaHSO3

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

B: 121-57-3
4-aminobenzene sulfonic acid

Conditions

Conditions	Yield
bei folgendem Ansaeuern mit Salzsaeure;

: 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

Conditions	Yield
beim Zufuegen von Phenylhydrazin und weiteren Erwaermen;

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

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 NO_x and SO_x.

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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