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2,4-Dinitrophenol structure
Chemical Name:
X 32;EK 102;Dinitra;Dinofan;Fenoxyl;nsc1532;Aldifen;2,4-DNP;NSC 1532;Maroxol-50
Molecular Formula:
Formula Weight:
MOL File:

2,4-Dinitrophenol Properties

Melting point:
108-112 °C(lit.)
Boiling point:
318.03°C (rough estimate)
1,683 g/cm3
vapor density 
6.35 (vs air)
refractive index 
1.4738 (estimate)
Flash point:
11 °C
storage temp. 
Solubility Sparingly soluble in water; soluble in ethanol, benzene
3.96(at 15℃)
Light yellow
PH Range
Water Solubility 
0.6 g/100 mL (18 ºC)
Light Sensitive
Stable. Combustible.
Major Application
Display device, recording materials, inks, paints, method for preserving food, method for gene expression profiling, treatment of parasitic diseases, neurological diseases, epilepsy, cancer, keratin materials, neoplasms, infectious diseases, neutropenia, detecting chromosome aberrations, bacteria in gastrointestinal track
CAS DataBase Reference
51-28-5(CAS DataBase Reference)
NIST Chemistry Reference
Phenol, 2,4-dinitro-(51-28-5)
EPA Substance Registry System
Phenol, 2,4-dinitro-(51-28-5)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  T,N,Xi,F
Risk Statements  23/24/25-33-50-39/23/24/25-11-52/53-1
Safety Statements  28-37-45-61-28A-36/37-16-7-35
RIDADR  UN 1320 4.1/PG 1
WGK Germany  3
RTECS  SL2800000
HazardClass  4.1
PackingGroup  I
HS Code  29089990
Hazardous Substances Data 51-28-5(Hazardous Substances Data)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H228 Flammable solid Flammable solids Category 1
Category 2
P210, P240,P241, P280, P370+P378
H300 Fatal if swallowed Acute toxicity,oral Category 1, 2 Danger P264, P270, P301+P310, P321, P330,P405, P501
H310 Fatal in contact with skin Acute toxicity,dermal Category 1, 2 Danger P262, P264, P270, P280, P302+P350,P310, P322, P361, P363, P405, P501
H330 Fatal if inhaled Acute toxicity,inhalation Category 1, 2 Danger P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501
H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501
H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501
H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P311 Call a POISON CENTER or doctor/physician.
P320 Specific treatment is urgent (see … on this label).
P330 Rinse mouth.
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P405 Store locked up.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.

2,4-Dinitrophenol price More Price(5)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 34334 2,4-Dinitrophenol PESTANAL 51-28-5 250mg $42.2 2018-11-20 Buy
Sigma-Aldrich D198501 2,4-Dinitrophenol moistened with water, ≥98.0% 51-28-5 1kg $99.3 2018-11-20 Buy
Sigma-Aldrich 40057 2,4-Dinitrophenol solution certified reference material, 5000 μg/mL in methanol 51-28-5 40057 $44.6 2018-11-23 Buy
Sigma-Aldrich D198501 2,4-Dinitrophenol moistened with water, ≥98.0% 51-28-5 5g $22.7 2018-11-20 Buy
Sigma-Aldrich D198501 2,4-Dinitrophenol moistened with water, ≥98.0% 51-28-5 100g $26.5 2018-11-20 Buy

2,4-Dinitrophenol Chemical Properties,Uses,Production

Chemical Properties

light yellow crystal powder


Dinitrophenol is used in the manufacture of dyes, as a wood preservative, and as an indicator and analytical reagent.

General Description

Solid yellow crystals. Explosive when dry or with less than 15% water. The primary hazard is from blast of an instantaneous explosion and not flying projectiles and fragments. slightly soluble in water and soluble in ether and solutions of sodium or potassium hydroxide.

Air & Water Reactions

Highly flammable. Slightly soluble in water.

Reactivity Profile

2,4-Dinitrophenol may explode if subjected to heat or flame. may explode if allowed to dry out. Forms explosive salts with alkalis and ammonia. Incompatible with heavy metals and their compounds. Also incompatible with strong oxidizing agents, strong bases and reducing agents. Reacts with combustibles.

Health Hazard


Health Hazard

2,4-Dinitrophenol is a severely acute toxicant, exhibiting high toxicity in animals by all routes of administration. It can be absorbed through the intact skin. The toxic effects are heavy sweating, nausea, vomiting, collapse, and death. Ingestion of 1 g of solid can be fatal to humans. A 30-minute exposure to its vapors at a concentration of 300 mg/m3 was lethal to dogs (NIOSH 1986). Chronic effects include polyneuropathy, weight loss, cataracts, and dermatitis.
LD50 value, oral (rats): 30 mg/kg.

Fire Hazard

Combustible. May explode if subjected to heat or flame. POISONOUS GAS IS PRODUCED WHEN HEATED. Vapors are toxic. Can detonate or explode when heated under confinement.

Safety Profile

A deadly human poison by ingestion. An experimental poison by ingestion, inhalation, intravenous, intraperitoneal, subcutaneous, and intramuscular routes. Moderately toxic by skin contact. Experimental teratogenic and reproductive effects. Human systemic effects: body temperature increase, change in heart rate, coma. A skin irritant. Mutation data reported. Phytotoxic. A pesticide. An explosive. Forms explosive salts with alkalies and ammonia. When heated to decomposition it emits toxic fumes of NOx. See also NITRO COMPOUNDS of AROMATIC HYDROCARBONS.

Metabolic pathway

The bacterial strain RB1, which is isolated by enrichment cultivation with 2,4-dinitrophenol, degrades this phenol into two aliphatic acids. One metabolite results from the release of the 2-nitro group as nitrile, with the production of aliphatic nitro compound, 3-nitroadipate. Then, the 3-nitro group is released from this metabolite as nitrile. The other metabolite is 4,6-dinitrohexanoic acid possessing two nitro groups from 2,4-dinitrophenol.

Purification Methods

Crystallise it from *benzene, EtOH, EtOH/H2O or H2O acidified with dilute HCl, dry it, then recrystallise it from CCl4. Dry it in an oven and store it in a vacuum desiccator over CaSO4. The benzoate has m 132o (from EtOH). [Beilstein 6 IV 1369.]

2,4-Dinitrophenol Preparation Products And Raw materials

Raw materials

Preparation Products

2,4-Dinitrophenol Suppliers

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2,4-Dinitrophenol Spectrum

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