International Chemical Safety Cards

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

1,2-DICHLORO-4-NITROBENZENE
3,4-Dichloronitrobenzene
DCNB
C6H3Cl2NO2
Molecular mass: 192.0
CAS # 99-54-7
RTECS # CZ5250000
ICSC # 0254
UN # 1578
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.
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 © IPCS CEC 1993

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 and hydrogen chloride (see ICSC # 0163). Reacts violently with oxidants and strong bases.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
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 irritates 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
© IPCS, CEC, 1993
IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of 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.