3-Nitroaniline Property

Melting point:

111-114 °C (lit.)

Boiling point:

306 °C

Density 

0,901 g/cm³

vapor pressure 

1 mm Hg ( 119 °C)

refractive index 

1.6396 (estimate)

Flash point:

196 °C

storage temp. 

Store below +30°C.

solubility 

1.25g/l

Colour Index 

37030

form 

Crystals, Crystalline Powder and/or Chunks

pka

2.466(at 25℃)

color 

Yellow to ochre-yellow to orange

Specific Gravity

0.901

Water Solubility 

1.25 g/L

Merck 

14,6581

BRN 

636962

Henry's Law Constant

1.93 x 10^-5 atm?m³/mol at 25 °C (approximate - calculated from water solubility and vapor pressure)

CAS DataBase Reference

99-09-2(CAS DataBase Reference)

NIST Chemistry Reference

m-Nitroaniline(99-09-2)

EPA Substance Registry System

m-Nitroaniline (99-09-2)

Safety

Hazard Codes 

T

Risk Statements 

23/24/25-33-52/53

Safety Statements 

28-36/37-45-61-28A

RIDADR 

UN 1661 6.1/PG 2

WGK Germany 

2

RTECS 

BY6825000

F 

8

Autoignition Temperature

521℃

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

II

HS Code 

29214210

Hazardous Substances Data

99-09-2(Hazardous Substances Data)

Toxicity

Acute LD₅₀ for guinea pigs 450 mg/kg, mice 308 mg/kg, quail 562 mg/kg, rats 535 mg/kg (quoted, RTECS, 1985).

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H373May cause damage to organs through prolonged or repeated exposure

H412Harmful to aquatic life with long lasting effects

Precautionary statements

P273Avoid release to the environment.

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

P314Get medical advice/attention if you feel unwell.

3-Nitroaniline Chemical Properties,Usage,Production

Chemical Properties

3-Nitroaniline is a ochre-yellow to orange crystalline powder, crystallizes as yellow needles from water. It is moderately soluble in organic solvents and sparingly soluble in water (0.11 %).

Physical properties

Yellow, rhombic crystals or powder. Finely dispersered particles form explosive mixtures. Combustible.

Uses

Dyestuff intermediate. Acetylation of 3-nitroaniline followed by reduction gives 3-aminoacetanilide. Diazotization, followed by reduction of the diazosulfonate with ammonium bisulfite and subsequent hydrolysis, gives (3-nitrophenyl) hydrazine; an intermediate in the production of pyrazolone azo coupling components. 3-Nitroaniline is used as a diazo component (Fast Orange R Base) in azo dyes (e.g., C.I. Disperse Yellow 5 and C.I. Acid Orange 18).

Uses

3-Nitroaniline is commonly used as a raw material for dyes. It is also used as a chemical intermediate for azo coupling component 17 and the dyes disperse yellow 5 and acid blue 29. The chemical is changed to other substances (dyestuffs and m-nitrophenol) during the dyeing process.

Production Methods

1,3-Dinitrobenzene is added to warm water containing magnesium sulfate. An aqueous solution of sodium hydrogen sulfide (6 molar equivalents) is added gradually to the vigorously stirred emulsion, and reduction is completed by heating to 90 ℃. The 3-nitroaniline produced solidifies on cooling and is separated by filtration.

Preparation

M-nitroaniline partial reduction.

Synthesis Reference(s)

The Journal of Organic Chemistry, 45, p. 4992, 1980 DOI: 10.1021/jo01312a039
Tetrahedron Letters, 30, p. 251, 1989 DOI: 10.1016/S0040-4039(00)95173-6
Chemical and Pharmaceutical Bulletin, 34, p. 2013, 1986 DOI: 10.1248/cpb.34.2013

General Description

Yellow needles or yellow powder.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Thermal stability of 3-Nitroaniline is reduced by various impurities. 3-Nitroaniline may be sensitive to prolonged exposure to light. 3-Nitroaniline may react explosively with ethylene oxide at 266° F. 3-Nitroaniline is incompatible with acids (nitric, sulfuric), acid chlorides, acid anhydrides, chloroformates and strong oxidizing agents. . Unstable when heated.

Hazard

Moderate fire risk. Toxic when absorbed by skin.

Fire Hazard

Flash point data for 3-Nitroaniline are not available; however, 3-Nitroaniline is probably combustible.

Synthesis

1,3-Dinitrobenzene is added towarmwater containing magnesium sulfate. An aqueous solution of sodium hydrogen sulfide (6molar equivalents) is added gradually to the vigorously stirred emulsion, and reduction is completed by heating to 90℃. The 3-nitroaniline produced solidifies on cooling and is separated by filtration.

Environmental Fate

Biological. A bacterial culture isolated from the Oconee River in North Georgia degraded 3- nitroaniline to the intermediate 4-nitrocatechol (Paris and Wolfe, 1987). A Pseudomonas sp. strain P6, isolated from a Matapeake silt loam, did not grow on 3-nitroaniline as the sole source of carbon. However, in the presence of 4-nitroaniline, all of the applied 3-nitroaniline metabolized completely to carbon dioxide (Zeyer and Kearney, 1983). In the presence of suspended natural populations from unpolluted aquatic systems, the second-order microbial transformation rate constant determined in the laboratory was reported to be 4.6 ± 0.1 x 10^-13 L/organism?h (Steen, 1991).
In activated sludge inoculum, following a 20-d adaptation period, no degradation was observed (Pitter, 1976).
Chemical/Physical. Reacts with acids forming water soluble salts.

Purification Methods

Purify it as for o-nitroaniline. Warning: it is absorbed through the skin. [Beilstein 12 IV 1589.]