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4-Phenylazophenol

4-Phenylazophenol Structure
4-Phenylazophenol structure
CAS No.
1689-82-3
Chemical Name:
4-Phenylazophenol
Synonyms
4-(phenyldiazenyl)phenol;(E)-4-(phenyldiazenyl)phenol;CI 11800;CI NO 11800;organolyellowap;fastoilyellow2g;PHENYLAZOPHENOL;SOLVENT YELLOW 7;pirocardgreen491;cisolventyellow7
CBNumber:
CB5366310
Molecular Formula:
C12H10N2O
Molecular Weight:
198.22
MDL Number:
MFCD00002330
MOL File:
1689-82-3.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-09-12 18:53:31
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4-Phenylazophenol Properties

Melting point 150-152 °C(lit.)
Boiling point 230°C/20mmHg(lit.)
Density 1.1447 (rough estimate)
refractive index 1.6330 (estimate)
storage temp. 2-8°C
solubility DMSO, Methanol
form Fine Crystalline Powder
pka 8.93±0.13(Predicted)
Colour Index 11800
color Brown
Water Solubility Soluble in acetone, ethanol, benzene and ether. Insoluble in water.
λmax 347 nm
ε(extinction coefficient) 10000 at 233-239nm in methanol at 0.005g/L
BRN 957567
Henry's Law Constant 1.5×104 mol/(m3Pa) at 25℃, Duchowicz et al. (2020)
Major Application diagnostic assay manufacturing
hematology
histology
InChI 1S/C12H10N2O/c15-12-8-6-11(7-9-12)14-13-10-4-2-1-3-5-10/h1-9,15H/b14-13+
InChIKey BEYOBVMPDRKTNR-BUHFOSPRSA-N
SMILES Oc1ccc(cc1)\N=N\c2ccccc2
CAS DataBase Reference 1689-82-3(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII VX4306NSH1
IARC 3 (Vol. 8, Sup 7) 1987
EPA Substance Registry System p-Phenylazophenol (1689-82-3)
UNSPSC Code 12171500
NACRES NA.47

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)Environment (GHS09)
GHS07,GHS09
Signal word  Warning
Hazard statements  H315-H319-H335-H411
Precautionary statements  P261-P280a-P304+P340-P305+P351+P338-P405-P501a
PPE dust mask type N95 (US), Eyeshields, Gloves
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36
RIDADR  3234
WGK Germany  3
RTECS  SM8300000
TSCA  TSCA listed
HS Code  29270000
Storage Class 11 - Combustible Solids
Hazard Classifications Aquatic Chronic 2
Hazardous Substances Data 1689-82-3(Hazardous Substances Data)
NFPA 704
1
2 0

4-Phenylazophenol price More Price(46)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 131083 4-Phenylazophenol 98% 1689-82-3 25g $179 2026-04-30 Buy
Sigma-Aldrich 131083 4-Phenylazophenol 98% 1689-82-3 100g $392 2023-06-20 Buy
TCI Chemical P0149 4-(Phenylazo)phenol >95.0%(T) 1689-82-3 25g $41 2026-04-30 Buy
Usbiological 288046 4-Phenylazophenol Asreported 1689-82-3 100g $333 2026-06-03 Buy
Usbiological 288046 4-Phenylazophenol Asreported 1689-82-3 250g $573 2026-06-03 Buy
Product number Packaging Price Buy
131083 25g $179 Buy
131083 100g $392 Buy
P0149 25g $41 Buy
288046 100g $333 Buy
288046 250g $573 Buy

4-Phenylazophenol Chemical Properties, Uses, Production

Chemical Properties

BROWN FINE CRYSTALLINE POWDER

Uses

4-Phenylazophenol is a diaryl-azo derivative with potential use as potential antifungal agents. 4-Phenylazophenol is an azo dye with toxic effects as well as a being a soil contaminant. Dyes and metabolites.

Definition

ChEBI: 4-Hydroxyazobenzene is a member of azobenzenes.

Preparation

aniline diazotization, and phenol coupling.

Properties and Applications

brilliant yellow. Soluble in ethanol, Acetone and benzene. In concentrated sulfuric acid for yellow orange, dilution after light yellow, In concentrated sodium hydroxide solution for gold. Used to varnish, grease, paraffin wax, resin, soap kind of coloring.

Standard Light Fastness Heat-resistant(℃) water Sodium Carbonate(5%) Hydrochloric acid(5%)
Melting point Stable
ISO Good 160 Indissolvable

Purification Methods

Crystallise the dye from *benzene or 95% EtOH. [Beilstein 16 II 38, 16 III 86, 16 IV 159.]

4-Phenylazophenol synthesis

62-53-3
108-95-2
1689-82-3
Synthesis of 4-Phenylazophenol from Aniline and Phenol

4-Phenylazophenol Preparation Products And Raw materials

Raw materials

PotassiuM iodide starch pa Azobenzene Dilute hydrochloric acid Azoxybenzene Sulfuric acid
Phenol 4-Hydroxybenzoic acid Phenol Aniline

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Preparation Products

5-Methoxy-2-phenyl-2H-indazole Phenol, 2-(2-phenyldiazenyl)- Triphenylmethane Phthalic acid 4-Methoxyazobenzene
Diazene, 1,2-diphenyl-, stereoisomer C.I. Sulphur Green 18 (8CI)

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4-Phenylazophenol Suppliers

Global Suppliers ( 224)
Supplier Tel Email Country ProdList Advantage
Shandong Liteng Biotechnology Co., Ltd 15020019777 18663721413 rosy@litengpharm.com China 1615 58
J & K SCIENTIFIC LTD. 18210857532 18210857532 jkinfo@jkchemical.com China 96815 76
Meryer (Shanghai) Chemical Technology Co., Ltd. 4006356688 18621169109 market03@meryer.com China 40202 62
Alfa Aesar 400-6106006 saleschina@alfa-asia.com China 30103 84
TCI (Shanghai) Development Co., Ltd. 021-67121386 Sales-CN@TCIchemicals.com China 24512 81
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44850 61
Chemsky（shanghai）International Co.,Ltd. 021-50135380 shchemsky@sina.com China 32273 50
Shandong Xiya Chemical Co., Ltd 13355009207 13355009207 3007715519@qq.com China 18722 57
Sinopharm Chemical Reagent Co,Ltd. 86-21-63210123 sj_scrc@sinopharm.com China 9791 79
Maya High Purity Chemicals +86 (573) 82222445 (0)18006601000 452520369 sales@maya-r.com China 11693 57
Supplier Advantage
Shandong Liteng Biotechnology Co., Ltd 58
J & K SCIENTIFIC LTD. 76
Meryer (Shanghai) Chemical Technology Co., Ltd. 62
Alfa Aesar 84
TCI (Shanghai) Development Co., Ltd. 81
Energy Chemical 61
Chemsky（shanghai）International Co.,Ltd. 50
Shandong Xiya Chemical Co., Ltd 57
Sinopharm Chemical Reagent Co,Ltd. 79
Maya High Purity Chemicals 57

View Latest Price from 4-Phenylazophenol manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
4-PHENYLAZOPHENOL pictures 2026-06-30 4-PHENYLAZOPHENOL
1689-82-3
 1kg 98% 1000kg Shaanxi Dideu New Materials Co. Ltd

4-Phenylazophenol Spectrum

4-PHENYLAZOPHENOL(1689-82-3)MS4-PHENYLAZOPHENOL(1689-82-3)1HNMR4-PHENYLAZOPHENOL(1689-82-3)IR14-PHENYLAZOPHENOL(1689-82-3)IR2

1689-82-3 (4-Phenylazophenol) Related Search:

Mordant Yellow 3 ORANGE I DISPERSE ORANGE 13 Olsalazine sodium Mordant Yellow 10
4,4'-AZOXYANISOLE Mordant Orange 1 Solvent Red 3 SUDAN ORANGE G 4-(4-Nitrophenyl)azoresorcinol
4-Phenylazophenol 4-[4-(Phenylazo)phenylazo]-o-cresol Acid orange 63 Acid red 114 Acid yellow 65
4-Nitrobenzene-AZO-orcinol 4-(4-Nitrophenylazo)-1-naphthol 4,4'-Azoxydiphenetole

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4-HYDROXYAZOBENZENE 4-BENZENEAZOPHENOL CI NO 11800 CI 11800 SOLVENT YELLOW 7 P-PHENYLAZOPHENOL P-HYDROXYAZOBENZENE P-BENZENEAZOPHENOL 1,4-Benzoguinonemonphenylhydrazone 4-(phenylazo)-pheno 4-[(E)-Phenyldiazenyl]phenol 4-hydroxy-azobenzen organolyellowap p-(phenylazo)-pheno Phenol, p-(phenylazo)- Pirocard Green 491 pirocardgreen491 Zlut rozpoustedlova 7 zlutrozpoustedlova7 TIMTEC-BB SBB000372 4-Hydroxyazobenzene,CI 11800 4-Phenylazophenol,CI 11800 Atul Brilliant Oil Yellow G atulbrilliantoilyellowg Brasilazina Oil Yellow O brasilazinaoilyellowo C.I. Solvent Yellow 7 c.i.solventyellow7 cisolventyellow7 Fast Oil Yellow 2G fastoilyellow2g Organol Yellow AP 4-Phenylazophenol, 97% 100GR Phenol,4-(2-phenyldiazenyl) PARA-HYDROXYAZOBENZENE PHENYLAZOPHENOL PARA-PHENYLAZOPHENOL Solvent yellow 7 (C.I. 11800) SOLVENT YELLOW 7 (4-PHENYLAZOPHENOL) p-HYDROXYAZOBENZENE pure 4-Hydroxyazobenzene, Solvent Yellow 7 1,4-Benzoquinone monophenylhydrazone 4-Phenylazophenol,97% 4-(Phenylazo)phenol> C.I.Solvent Yellow 7:C.I.11800 4-Phenylazophenol (Solvent Yellow 7, 4-HAB) 4-(phenylhydrazinylidene)cyclohexa-2,5-dien-1-one Mesalazine Impurity 26 Mesalazine Impurity 01 4-(Phenylazo)phenol, ≥ 95.0% Ergothioneine Impurity 8 (E)-4-(phenyldiazenyl)phenol 4-(phenyldiazenyl)phenol 4-Phenylazophenol 1689-82-3 HOC6H4NNC6H5 Indicators Adsorption Indicators