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Dye intermediates

Picramic acid

Also known as 2-Amino-4,6-dinitrophenol, Fourrine 4R, Fourrine 93

CAS 96-91-3Formula C6H5N3O5Molar mass 199.12 g/molEC 202-544-6
GHS signal word: Danger. Pictograms: Explosive, Harmful or irritant 7 suppliers listed
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Picramic acid chemical structure, C6H5N3O5, CAS 96-91-3
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Dark red needles from alc, prisms from chloroform
Melting point
169 °C
Flash point
210 °C
Solubility
More sol in hot water than in cold water
HS code
292229
Category
Dye intermediates
UN number
UN 3317
Illustrative photo, red pigment powder in an open fibre drum in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Picramic acid?

Plain description, key identifiers and synonyms

2-amino-4,6-dinitrophenol appears as dark red needles or prisms. Red crystals. Water insoluble. Explosive in the dry state but desensitized by wetting. Easily ignited and once ignited burn readily.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-amino-4,6-dinitrophenol
CAS number
96-91-3 CAS number cross-checked
EC number
202-544-6
Molecular formula
C6H5N3O5
UNII
5VDQ7GK8L3
INCI name
PICRAMIC ACID
InChIKey
QXYMVUZOGFVPGH-UHFFFAOYSA-N
InChI
InChI=1S/C6H5N3O5/c7-4-1-3(8(11)12)2-5(6(4)10)9(13)14/h1-2,10H,7H2
SMILES (canonical and isomeric)
C1=C(C=C(C(=C1N)O)[N+](=O)[O-])[N+](=O)[O-]

Synonyms

  • 2-Amino-4,6-dinitrophenol
  • Fourrine 4R
  • Fourrine 93
  • Furro 4R
  • Acide picramique
  • Oxidation Base 21
  • Zoba 4R
  • 2,4-Dinitro-6-aminophenol
  • C.I. Oxidation Base 21
  • CI Oxidation Base 21
  • 1-Amino-2-hydroxy-3,5-dinitrobenzene
  • CI 76540
  • C.I. 76540
  • 1-Amino-3,5-dinitro-2-hydroxybenzene
  • 6-Amino-2,4-dinitrophenol
  • Phenol, 2-amino-4,6-dinitro-
  • 4,6-Dinitro-2-aminophenol
  • Pikraminsaure
  • 4,6-dinitro-2-amino-phenol
  • 4-13-00-00909 (Beilstein Handbook Reference)
  • Amino-4,6-dinitrophenol, 2-
  • 2-Amino-4,6-dinitrophenol (wet with ~20% of water)
  • 2-Amino-4,6-Dinitrophenol, wetted with not <20% water by mass
  • 2-Amino-4,6-Dinitrophenol, wetted with not <20% water by mass [UN3317] [Flammable solid]

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

Appearance
Dark red needles from alc, prisms from chloroformexp.
Melting point
169 °Cexp.
Flash point
210 °Cexp.
Solubility
More sol in hot water than in cold waterexp.

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
199.12 g/molcalc.
Exact mass
199.0229 Dacalc.
LogP (octanol/water)
0.79calc.
Topological polar surface area
132.5 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
6calc.
Rotatable bonds
2calc.
Heavy atoms
14calc.
Rings
1calc.
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, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS01: Explosive
Explosive
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H201Explosive, mass explosion hazard.
  • H302Harmful if swallowed.
  • H312Harmful in contact with skin.
  • H332Harmful if inhaled.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (22)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P230Keep wetted with water or another suitable desensitiser.
  • P240Ground and bond container and receiving equipment.
  • P250Do not subject to grinding, shock or friction.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P370 + P380In case of fire: Evacuate area.
  • P372Explosion risk.
  • P373Do not fight fire when fire reaches explosives.
  • P401Store in accordance with local regulations.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3317
Transport hazard class
4.1
Packing group
I

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

Picramic acid suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 7 suppliers
7 of 7 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

7 suppliers in 2 countries

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Picramic acid price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Chemical intermediate for dyes, esp mordant dyes, diazodinitrophenol, an explosive initiator, oxidn base for dyeing fur, component of electric detonation fuses, reagent for albumin, acid-base indicator.

Manufacture of azo dyes, rarely as an indicator, reagent for albumin.

Use classes: Cosmetics.

Cosmetic ingredient, INCI name PICRAMIC ACID(hair dyeing)

Functional uses

  • Dye

Cosmetic functions

  • Hair dyeing

How it is made

Reduction of 2,4,6-trinitrophenol with sodium hydrosulfide

Prepd from picric acid, concentrated NH4OH, & H2S followed by acetic acid neutralization of ammonium salt. Prepn of ammonium salt from picric acid, aq NH3-soln, & ammonium sulfide.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 612-034-00-9

Health and food

  • EU cosmetic ingredient inventory
  • EU Cosmetics Regulation Annex III, restricted in cosmetics
    Name: Picramic Acid and Sodium Picramate, Ref no: 280, Annex ref: III/280

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2922.29Indicative HS code

Amino-naphthols and other amino-phenols, other than those containing more than one kind…

World exports in 2024
$467M
−15.3% vs 2023, imports $454M
2019 to 2024
Top exporters
  1. China63.1%
  2. India * partner reported15.5%
  3. Japan4.0%
Top importers
  1. India * partner reported25.8%
  2. United States14.4%
  3. South Korea7.6%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Picramic acid, based on the data on this page

What is Picramic acid?

2-amino-4,6-dinitrophenol appears as dark red needles or prisms. Red crystals. Water insoluble. Explosive in the dry state but desensitized by wetting. Easily ignited and once ignited burn readily.

What is the CAS number of Picramic acid?

The CAS registry number of Picramic acid is 96-91-3.

What is the molecular formula and weight of Picramic acid?

The molecular formula of Picramic acid is C6H5N3O5 and its molar mass is 199.12 g/mol.

What is Picramic acid used for?

Chemical intermediate for dyes, esp mordant dyes, diazodinitrophenol, an explosive initiator, oxidn base for dyeing fur, component of electric detonation fuses, reagent for albumin, acid-base indicator. Manufacture of azo dyes, rarely as an indicator, reagent for albumin. Use classes: Cosmetics.

Is Picramic acid hazardous?

Picramic acid carries the GHS signal word "Danger". Main hazards: explosive, mass explosion hazard, harmful if swallowed, harmful in contact with skin. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Picramic acid?

Picramic acid is usually classified under HS code 292229 (Amino-naphthols and other amino-phenols, other than those containing more than one kind…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Picramic acid?

CompoundList lists 7 suppliers of Picramic acid in India and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Picramic acid in India?

5 suppliers in India list Picramic acid on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Picramic acid?

Suppliers quote Picramic acid 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 Picramic acid

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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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