Product Identification

Product Name

4-Nitropyridine N-oxide

Synonyms

4-Nitro-1-oxidopyridin-1-ium
p-Nitropyridine N-oxide

CAS

1124-33-0

Formula

C5H4N2O3

Molecular Weight

140.11000000000001

EINECS

214-395-4

RTECS

UT6380000

RTECS Class

Tumorigen; Mutagen

Beilstein/Gmelin

124331

Beilstein Reference

5-20-05-00448

EC Class

toxic, irritant

Physical and Chemical Properties

Solubility in water

Very soluble

Melting Point

161

Boiling Point

397

Vapor Pressure

4E-6 (25 C)

Density

1.52 g/cm3

Partition Coefficient

-1.47

Heat Of Vaporization

62.2 kJ/mol

Heat Of Combustion

-2551 kJ/mol

First Aid Measures

Ingestion

Seek medical assistance.

Inhalation

Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.

Skin

Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.

Eyes

Immediately flush with running water for at least 20 minutes.

Hazards Identification

Ingestion

See Inhalation.

Inhalation

TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Effects of contact or inhalation may be delayed.

Skin

Contact with molten substance may cause severe burns to skin and eyes. See Inhalation.

Eyes

See Inhalation.

Hazards

Contact with metals may evolve flammable hydrogen gas.

EC Risk Phrase

R 21 25 36/37/38 40

EC Safety Phrase

S 26 36/37/39 45

UN (DOT)

2811

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Poison Class

2

Fire Fighting Measures

Flash Point

194

Fire Fighting

Extinguish using agent most appropriate for surrounding fire.

Fire Potential

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Accidental Release Measures

Small spills/leaks

ELIMINATE all ignition sources. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.

Transport Information

UN Number

2811

HS Code

2933 39 99

Stability and Reactivity

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.