International Chemical Safety Cards

1,2-DICHLORO-4-NITROBENZENE

ICSC: 0254

3,4-Dichloronitrobenzene
DCNB
C₆H₃Cl₂NO₂
Molecular mass: 192.0

ICSC #    0254
CAS #     99-54-7
RTECS # CZ5250000
UN #        1578
October 24, 1995 Peer reviewed

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.	Powder, water spray, foam, carbon dioxide.
EXPLOSION	Finely dispersed particles form explosive mixtures in air.	Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.

EXPOSURE		PREVENT DISPERSION OF DUST!
•INHALATION		Local exhaust or breathing protection.	Fresh air, rest.
•SKIN		Protective gloves.	Remove contaminated clothes. Rinse skin with plenty of water or shower.
•EYES	Redness. Pain.	Safety goggles.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION		Do not eat, drink, or smoke during work.	Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!).

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Consult an expert! Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting. Do NOT let this chemical enter the environment. (Extra personal protection: A/P3 filter respirator for organic vapour and toxic particles).

Separated from strong oxidants, strong bases, food and feedstuffs . Well closed. Ventilation along the floor.

Do not transport with food and feedstuffs.
R:
S:
UN Hazard Class: 6.1
UN Packing Group: II

SEE IMPORTANT INFORMATION ON BACK

ICSC: 0254

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.

International Chemical Safety Cards

1,2-DICHLORO-4-NITROBENZENE

ICSC: 0254

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PHYSICAL STATE; APPEARANCE:
COLOURLESS TO TAN NEEDLE-LIKE CRYSTALS.

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

CHEMICAL DANGERS:
The substance decomposes on burning producing toxic fumes of nitrogen oxides, hydrogen chloride (see ICSC 0163). Reacts violently with oxidants and strong bases .

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.

ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes and the skin . The substance may cause effects on the blood .

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Boiling point: 255°C
Melting point: 39-41°C
Relative density (water = 1): 1.45 at 75°C
Solubility in water:
none

Relative vapour density (air = 1): 6.6
Flash point: 124°C
Octanol/water partition coefficient as log Pow: 3.12

ENVIRONMENTAL
DATA

The substance may cause long-term effects in the aquatic environment.

N O T E S

Transport Emergency Card: TEC (R)-775 and 776 (molten)

ADDITIONAL INFORMATION

ICSC: 0254	1,2-DICHLORO-4-NITROBENZENE
(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.