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Dyes and pigments

Phenolindophenol

Also known as Indophenol, Benzenoneindophenol, 4-[(4-hydroxyphenyl)imino]cyclohexa-2,5-dien-1-one

CAS 500-85-6Formula C12H9NO2Molar mass 199.21 g/molEC 207-913-5
GHS signal word: Warning. Pictograms: Harmful or irritant 10 suppliers listed
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Phenolindophenol chemical structure, C12H9NO2, CAS 500-85-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
500-85-6
Formula
C12H9NO2
Molar mass
199.21 g/mol
EC number
207-913-5
HS code
292529
Category
Dyes and pigments

What is Phenolindophenol?

Plain description, key identifiers and synonyms

Indophenol is a quinone imine obtained by formal condensation of one of the keto groups of benzoquinone with the amino group of 4-hydroxyaniline. It has a role as a dye.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-(4-hydroxyphenyl)iminocyclohexa-2,5-dien-1-one
CAS number
500-85-6 CAS number cross-checkedOther or deprecated CAS: 5418-32-6
EC number
207-913-5
Molecular formula
C12H9NO2
UNII
BW444H326B
MDL number
MFCD00001621
InChIKey
RSAZYXZUJROYKR-UHFFFAOYSA-N
InChI
InChI=1S/C12H9NO2/c14-11-5-1-9(2-6-11)13-10-3-7-12(15)8-4-10/h1-8,14H
SMILES (canonical and isomeric)
C1=CC(=O)C=CC1=NC2=CC=C(C=C2)O

Synonyms

  • Indophenol
  • Benzenoneindophenol
  • 4-[(4-hydroxyphenyl)imino]cyclohexa-2,5-dien-1-one
  • 4-((4-hydroxyphenyl)imino)cyclohexa-2,5-dien-1-one
  • 4-((4-Hydroxyphenyl)imino)cyclohexa-2,5-dienone
  • 4-(4-hydroxyphenyl)iminocyclohexa-2,5-dien-1-one
  • N-(4-Hydroxyphenyl)-p-benzoquinone monoimine
  • 2,5-Cyclohexadien-1-one, 4-((4-hydroxyphenyl)imino)-
  • 2,5-Cyclohexadien-1-one, 4-[(4-hydroxyphenyl)imino]-
  • Sodium Benzenoneindophenol
  • phenol-indophenol
  • 4-((4-Hydroxyphenyl)imino)-2,5-cyclohexadien-1-one
  • N-(p-Hydroxyphenyl)-p-benzoquinone Monoimine
  • Indophenol, for microscopy
  • Indophenol, (*Sodium salt*)
  • 2,5-Cyclohexadien-1-one, 4-(4-hydroxyphenyl)imino-
  • 4-[(4-Hydroxyphenyl)imino]-2,5-cyclohexadien-1-one #

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
199.21 g/molcalc.
Exact mass
199.0633 Dacalc.
LogP (octanol/water)
2.16calc.
Topological polar surface area
49.66 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
1calc.
Heavy atoms
15calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=C1C=CC(=Nc2ccccc2)C=C1

O=C1C=CC(=Nc2ccccc2)C=C1

2 rings, 14 atoms, the 4-(Phenylimino)-2,5-cyclohexadien-1-one ring system.

104 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Phenolindophenol suppliers

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All 10 suppliers
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Where suppliers are based

10 suppliers in 6 countries

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Phenolindophenol price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Roles

  • dye

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Phenolindophenol is traded under.

HS 2925.29Indicative HS code

Imines and their derivatives, salts thereof, other

World exports in 2024
$1.8B
+12.4% vs 2023, imports $1.84B
2019 to 2024
Top exporters
  1. China35.9%
  2. France * partner reported15.5%
  3. Germany9.1%
Top importers
  1. United States13.3%
  2. China13.0%
  3. Brazil9.7%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Phenolindophenol is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Phenolindophenol, based on the data on this page

What is Phenolindophenol?

Indophenol is a quinone imine obtained by formal condensation of one of the keto groups of benzoquinone with the amino group of 4-hydroxyaniline. It has a role as a dye.

What is the CAS number of Phenolindophenol?

The CAS registry number of Phenolindophenol is 500-85-6. Other or deprecated CAS numbers: 5418-32-6.

What is the molecular formula and weight of Phenolindophenol?

The molecular formula of Phenolindophenol is C12H9NO2 and its molar mass is 199.21 g/mol.

What is Phenolindophenol used for?

Known uses and roles of Phenolindophenol include dye.

Is Phenolindophenol hazardous?

Phenolindophenol carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Phenolindophenol?

Phenolindophenol is usually classified under HS code 292529 (Imines and their derivatives, salts thereof, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Phenolindophenol?

CompoundList lists 10 suppliers of Phenolindophenol in China, France, United Kingdom, Hong Kong and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Phenolindophenol?

Suppliers quote Phenolindophenol on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Phenolindophenol

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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