PARAQUAT DICHLORIDE 0005
October 2001
Paraquat
CAS No: 1910-42-5
1,1'-Dimethyl-4,4'-bipyridinium dichloride
RTECS No: DW2275000
Methyl viologen dichloride
UN No: 2781
CH3(C5H4N)2CH3Cl2
EC No: 613-090-00-7
Molecular mass: 257.2
TYPES OF
ACUTE HAZARDS/SYMPTOMS PREVENTION FIRST AID/FIRE FIGHTING
HAZARD/
EXPOSURE
Not combustible. Gives off irritating In case of fire in the surroundings:
FIRE
or toxic fumes (or gases) in a fire. powder, water spray, foam, carbon
dioxide.
EXPLOSION
EXPOSURE PREVENT DISPERSION OF DUST! IN ALL CASES CONSULT A
STRICT HYGIENE! DOCTOR!
Cough. Sore throat. Laboured Local exhaust or breathing Fresh air, rest. Half-upright position.
Inhalation
breathing. Headache. Nosebleeds. protection. Refer for medical attention.
MAY BE ABSORBED! Redness. Protective gloves. Protective Remove contaminated clothes.
Skin
clothing. Rinse and then wash skin with water
and soap. Refer for medical
attention.
Redness. Pain. Face shield, or eye protection in First rinse with plenty of water for
Eyes
combination with breathing several minutes (remove contact
protection if powder. lenses if easily possible), then take
to a doctor.
Sore throat. Abdominal pain. Do not eat, drink, or smoke during Rinse mouth. Give plenty of water to
Ingestion
Nausea. Vomiting. Diarrhoea. (See work. Wash hands before eating. drink, or bentonite clay in water, or
Notes). give a slurry of activated charcoal in
water to drink. Induce vomiting
(ONLY IN CONSCIOUS
PERSONS!). Refer for medical
attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Consult an expert! Collect leaking and spilled liquid T+ Symbol Unbreakable packaging; put
in sealable containers as far as possible. Absorb N Symbol breakable packaging into closed
remaining liquid in sand or inert absorbent and R: 24/25-26-36/37/38-48/25-50/53 unbreakable container. Do not
remove to safe place. Sweep spilled substance into S: (1/2-)22-28-36/37/39-45-60-61 transport with food and feedstuffs.
sealable containers; if appropriate, moisten first to UN Hazard Class: 6.1
prevent dusting. Carefully collect remainder, then UN Pack Group: II
remove to safe place. Do NOT let this chemical
enter the environment. Chemical protection suit
including self-contained breathing apparatus.
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT7-I Keep in a well-ventilated room. Well closed. Separated from food and
feedstuffs. Provision to contain effluent from fire extinguishing.
IPCS Prepared in the context of cooperation between the International
Programme on Chemical Safety and the European Commission 漏
International IPCS 2004
Programme on
Chemical Safety SEE IMPORTANT INFORMATION ON THE BACK.
0005 PARAQUAT DICHLORIDE
IMPORTANT DATA
Physical State; Appearance Routes of exposure
COLOURLESS HYGROSCOPIC CRYSTALS OR WHITE TO The substance can be absorbed into the body by inhalation of
YELLOW HYGROSCOPIC CRYSTALLINE POWDER. WATER its aerosol, through the skin and by ingestion.
SOLUTION OF PARAQUAT DICHLORIDE IS DARK RED.
Inhalation risk
Chemical dangers Evaporation at 20/C is negligible; a harmful concentration of
The substance decomposes on heating above 300/C, producing airborne particles can, however, be reached quickly on spraying
toxic fumes including nitrogen oxides, hydrogen chloride. and when dispersed.
Attacks metal.
Effects of short-term exposure
Occupational exposure limits The substance is irritating to the eyes, the skin and the
TLV: (as paraquat, respirable fraction) 0.1 mg/m3; (ACGIH respiratory tract. Inhalation of this substance may cause lung
2004). oedema (see Notes). The substance may cause effects on the
TLV: (as paraquat) 0.5 mg/m3; (ACGIH 2004). kidneys, liver, gastrointestinal tract, cardiovascular system and
MAK: 0.1 ppm H; Peak limitation category: I(1); (DFG 2004). lungs, resulting in impaired functions, tissue lesions including
haemorrhage and lung fibrosis. Exposure to high concentrations
may result in death. Medical observation is indicated.
Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dermatitis.
The substance may have effects on the nails, resulting in nail
damage.
PHYSICAL PROPERTIES
Boiling point (decomposes): 300/C Solubility in water, g/100 ml at 20/C: 70
Melting point: 175-180/C Vapour pressure, Pa at 20/C: <0.0001
Relative density (water = 1): 1.25 Octanol/water partition coefficient as log Pow: -4.2
ENVIRONMENTAL DATA
The substance is very toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment. This
substance does enter the environment under normal use. Great care, however, should be given to avoid any additional release, e.g.
through inappropriate disposal.
NOTES
The toxicological information is the same for paraquat (CAS 4685-14-7).
Depending on the degree of exposure, periodic medical examination is indicated.
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical
effort. Rest and medical observation are therefore essential.
The symptoms of lung fibrosis (shortness of breath, laboured breathing) do not become manifest until several days.
Do NOT take working clothes home.
Carrier solvents used in commercial formulations may change physical and toxicological properties.
If the substance is formulated with solvents also consult the ICSCs of these materials.
Card has been partly updated in October 2004. See sections Occupational Exposure Limits, EU classification, Emergency
Response.
ADDITIONAL INFORMATION
Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible
LEGAL NOTICE
漏IPCS 2004
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