2,4-Dinitrophenylhydrazine Property

Melting point:

197-200 °C (lit.)

Boiling point:

335.43°C (rough estimate)

Density 

0.843 g/mL at 20 °C

refractive index 

n20/D 1.374

Flash point:

14 °C

storage temp. 

2-8°C

solubility 

50% sulfuric acid: 10 mg/mL, clear, colorless

pka

12.1(at 25℃)

form 

crystals

color 

Red

PH Range

Yellow (11.0) to brown (12.5)

Water Solubility 

slightly soluble

Merck 

14,3283

BRN 

615586

Stability:

Stable when wet, but explosive when dry. May be shock sensitive when dry. Highly flammable. Incompatible with strong oxidizing agents.

Major Application

Fuel cells, detecting microorganisms, antibacterial agent, treatment of acuteand chronic hepatitis, gynecopathy, cardiovascular diseases, cerebrovascular diseases

InChIKey

HORQAOAYAYGIBM-UHFFFAOYSA-N

CAS DataBase Reference

119-26-6(CAS DataBase Reference)

NIST Chemistry Reference

Hydrazine, (2,4-dinitrophenyl)-(119-26-6)

EPA Substance Registry System

2,4-Dinitrophenylhydrazine (119-26-6)

Safety

Hazard Codes 

F,Xn

Risk Statements 

1-11-22-40-2001/11/22

Safety Statements 

35-48A-45-36/37-16

RIDADR 

UN 3380 4.1/PG 1

WGK Germany 

3

RTECS 

MV3325000

F 

8

HazardClass 

4.1

PackingGroup 

II

HS Code 

29280000

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H302Harmful if swallowed

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P230Keep wetted with …

P233Keep container tightly closed.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P370+P380+P375in case of fire: Evacuate area. Fight fire remotely due to the risk of explosion.

P501Dispose of contents/container to..…

2,4-Dinitrophenylhydrazine Chemical Properties,Usage,Production

Description

2,4-Dinitrophenylhydrazine (abbreviated 2,4-DNP for short) is the chemical compound C6H3 (NO2) 2NHNH2, and it is often used to qualitatively test for carbonyl groups associated with aldehydes and ketones. The hydrazone derivatives can also be used as evidence toward the identity of the original compound. It is relatively sensitive to shock and friction; it is a shock explosive, so care must be taken with its use. To reduce its explosive hazard, it is usually supplied wet.
2,4-Dinitrophenylhydrazine is a compound with a benzene ring, two Nitro groups, and a hydrazine (two nitrogen atoms bonded directly to each other) functional group. It is used as a Brady's reagent to test the existing of a ketone or aldehyde.

Chemical Properties

white to light yellow crystal powde

Uses

2,4-Dinitrophenylhydrazine has been used as a reagent to detect the presence of aldehydes and ketones in protein carbonyls. It may be used as a colorimetric reagent in the quantitative estimation of prednisone.

Uses

2,4-Dinitrophenylhydrazine is known was Brady's reagent, a substituted hydrazine that is often used for qualitative testing of carbonyl groups associated with aldehydes and ketones.

Definition

ChEBI: 2,4-dinitrophenylhydrazine is a C-nitro compound that is phenylhydrazine substituted at the 2- and 4-positions by nitro groups. It has a role as a reagent. It is a member of phenylhydrazines and a C-nitro compound.

General Description

2,4-Dinitrophenylhydrazine (DNPH), a hydrazine derivative, is a potential mutagenic agent. Its molecular and crystal structure has been analyzed. The intra- and intermolecular hydrogen bonds in DNPH have been investigated by vibrational spectroscopic analysis. The mechanism of isothermal degradation of DNPH has been studied by differential scanning calorimetry (DSC).

Hazard

2,4-Dinitrophenylhydrazine [119-26-6] is a flammable solid, which must be kept moist and is harmful if swallowed, inhaled, or absorbed through the skin. Concentrated sulfuric acid [7664-93-9] is poisonous and corrosive. Its mist can cause severe burns to all body tissue. It may be fatal if swallowed or by skin contact. It is harmful if inhaled and may cause cancer. Ethanol [64-17-5] is flammable and should be kept from ignition sources. Eye and face protection, protective clothing, and gloves must be worn.

Purification Methods

Crystallise DNPH from butan-1-ol, dioxane, EtOH, *C6H6 or EtOAc. The hydrochloride has m 186o (dec). [Beilstein 15 IV 380.]

References

1. SOME LIMITATIONS OF 2,4-DINITROPHENYLHYDRAZINE AS A REAGENT FOR CARBONYL GROUPS. DOI:10.1021/JO01226A003
2. Linstromberg, W. W.; Baumgarten, H. E. Organic Experiments, 6th ed.; Houghton Mifflin: Boston, 2002; p 175. Shriner, R. L.; Hermann, C. K. F.; Morrill, T. C.; Curtin, D. Y.; Fuson, R. C. The Systematic Identification of Organic Compounds, 8th ed.; Wiley; Hoboken, NJ, 2004; pp 278–279.
3. An Improved Preparation of 2,4-Dinitrophenylhydrazine Reagent. DOI:10.1021/ED082P1310.2