2,5-DINITROPHENOL Chemical Properties

Melting point:

103-106 °C(lit.)

Boiling point:

318.03°C (rough estimate)

Density 

1.7195 (rough estimate)

refractive index 

1.4738 (estimate)

solubility 

Solubility Sparingly soluble in water; soluble in ethanol, ether

form 

Solid

pka

5.21, 5.1, 5.0(at 25℃)

color 

Yellowish needles

PH Range

4(colourless)-5.8(yellow)

Merck 

14,3281

BRN 

1913411

Stability:

Light Sensitive

Major Application

Liquid crystal films, electrophotographic materials, adhesives, inks, lubricants, preservation of cut flowers, food storage, materials for evaluating dental cariesactivity

CAS DataBase Reference

329-71-5(CAS DataBase Reference)

EPA Substance Registry System

2,5-Dinitrophenol (329-71-5)

Safety Information

Hazard Codes 

T,N

Risk Statements 

23/24/25-33-51/53

Safety Statements 

28-37-45-61

RIDADR 

UN 1320 4.1/PG 1

WGK Germany 

3

RTECS 

SL2900000

HazardClass 

4.1

PackingGroup 

I

HS Code 

29089990

Hazardous Substances Data

329-71-5(Hazardous Substances Data)

MSDS

• Language:English Provider:SigmaAldrich

2,5-DINITROPHENOL Usage And Synthesis

Chemical Properties

Yellow needles, flammable. Soluble in ether, benzene, hot water, and ethanol.

Uses

2,5-Dinitrophenol (wetted with ca. 20% Water) (unit weight on dry weight basis) is a useful reagent for the preparation of yttrium nitrophenolate aminebis(benzotriazolylphenolate) complexes.

Definition

ChEBI: 2,5-dinitrophenol is a dinitrophenol having the nitro groups at the 2- and 5-positions.

General Description

Yellow crystalline solid with a sweet musty odor. Sinks and mixes slowly with water.

Air & Water Reactions

Slowly mixes with water.

Reactivity Profile

2,5-DINITROPHENOL can detonate or explode when heated under confinement [USCG, 1999]. Phenols do not behave as organic alcohols, as one might guess from the presence of a hydroxyl (-OH) group in their structure. Instead, they react as weak organic acids. Phenols and cresols are much weaker as acids than common carboxylic acids (phenol has Ka = 1.3 x 10^[-10]). These materials are incompatible with strong reducing substances such as hydrides, nitrides, alkali metals, and sulfides. Flammable gas (H2) is often generated, and the heat of the reaction may ignite the gas. Heat is also generated by the acid-base reaction between phenols and bases.

Health Hazard

INHALATION, INGESTION OR SKIN ABSORPTION: Fatigue, thirst, sweating, flushing of face, nausea, vomiting, abdominal pain, diarrhea; restlessness, anxiety, excitement occasionaly leading to convulsions; fever, tachycardia, labored respiration, cyanosis, and sometimes muscle cramps. Loss of consciousness, cessation of breathing and death. EYES: Causes dilation of pupils or posterior subcapsular opacities or cataracts. SKIN: Discoloration, irritation, and dermatitis.

Purification Methods

Crystallise 2,5-dinitrophenol from H2O with a little EtOH. [Beilstein 6 IV 1383.]

2,5-DINITROPHENOL(329-71-5)Related Product Information

• 5-METHOXY-2,4-DINITROPHENOL
• 4-CHLORO-2,6-DINITROPHENOL
• 2-Amino-4,6-dinitrophenol, wetted with not less than 20% water
• 2-Methyl-4,6-dinitrophenol solution,2-Methyl-4,6-dinitrophenol, 3,5-Dinitro-2-hydroxytoluene, 4,6-Dinitro-2-methylphenol, 4,6-Dinitro-o-cresol, DNOC
• 2,3,6-TRINITROPHENOL
• 2,5-DINITROPHENOL
• Dinitrophenol,dry or wetted with less than 15% water,by mass
• 4-FLUORO-2,6-DINITROPHENOL 97%
• Sodium 2,4-dinitrophenate
• 2,4-Dinitrophenol
• 4-TERT-BUTYL-2,6-DINITROPHENOL 97%,4-TERT-BUTYL-2,6-DINITROPHENOL 99+%
• MEDINOTERB ACETATE
• dinoterb (ISO) 2-tert-butyl-4,6-dinitrophenol,Dinoterb: (2-(1,1-Dimethylethyl)-4,6-dinitrophenol)
• 2-Chlor-4,6-dinitrophenol
• 2,4-DINITROPHENOL stibilised with 30-35% water
• Din0l
• Sodium picramate
• 2,6-Dinitrophenol, 97%, stab. with ca 20% water,2,6-Dinitrophenol (wetted with ca. 20% Water, containing 5g on a dry weight basis),Dinitrophenol, 2,6-