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NIOSH

2,4-DINITROPHENOL

ICSC: 0464

1-Hydroxy-2,4-dinitrobenzene
C6H4N2O5 / C6H3(OH)(NO2)2
Molecular mass: 184.11
ICSC # 0464 		CAS # 51-28-5
RTECS # SL2800000
UN # 1320 (wetted with no less than 15% water)
EC # 609-041-00-4
March 25, 1996 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Water in large amounts.
EXPLOSION Risk of fire and explosion.
Do NOT expose to friction or shock.
In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position.
EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE!

•INHALATION See Ingestion.
Local exhaust or breathing protection.
Fresh air, rest (see Notes). Refer for medical attention.
•SKIN MAY BE ABSORBED! Redness. Roughness. Yellow staining of the skin. (Further see Inhalation).
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
•EYES
Safety goggles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION Nausea. Vomiting. Palpitations. Collapse. Sweating.
Do not eat, drink, or smoke during work.
Rest. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Do not allow to dry out. Sweep spilled substance into containers. Wipe up remainder in sand or other inert material, then remove to safe place. Personal protection: complete protective clothing including self-contained breathing apparatus.
Fireproof. Separated from combustible and reducing substances, food and feedstuffs . Cool.
Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
Marine pollutant.
Note: C
T symbol
N symbol
R: 23/24/25-33-50
S: 1/2-28-37-45-61
UN Hazard Class: 4.1
UN Subsidiary Risks: 6.1
UN Packing Group: I
ICSC: 0464 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

2,4-DINITROPHENOL

ICSC: 0464

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
YELLOW CRYSTALS. (SEE NOTES).

PHYSICAL DANGERS:
Dust explosion possible if in powder or granular form, mixed with air.

CHEMICAL DANGERS:
May explosively decompose on shock, friction, or concussion. May explode on heating. Shock-sensitive compounds are formed with alkalis, ammonia and most metals. The substance decomposes on heating producing toxic gases including nitrogen oxides (see Notes).

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

INHALATION RISK:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance may cause effects on metabolism , resulting in very high body temperature. Exposure may result in death.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the peripheral nervous system. The substance may have effects on the eyes , resulting in cataracts.

PHYSICAL
PROPERTIES

Sublimation
Melting point: 112°C
Relative density (water = 1): 1.68
Solubility in water, g/100 ml at 54.5°C: 0.14
Relative vapour density (air = 1): 6.36

ENVIRONMENTAL
DATA

This substance may be hazardous to the environment; special attention should be given to aquatic organisms.

N O T E S

Use all available methods for reducing body temperature. Because of its explosive properties, the compound is used in the form of a water paste. UN 0076 applies to the dry compound. CAS 25550-58-7 applies to unspecified isomers of dinitrophenol. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response.
Transport Emergency Card: TEC (R)-41GDT-I

ADDITIONAL INFORMATION



ICSC: 0464 2,4-DINITROPHENOL
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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