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DIQUAT DIBROMIDE ICSC: 1363
Date of Peer Review: October 2001

1,1'-Ethylene-2,2'-bipyridyllium dibromide
6,7-Dihydrodipyridol[1,2-a:2',1-c]pyrazinedium dibromide
9,10-Dihydro-8a-10a-diazoniaphenanthrene dibromide
CAS # 85-00-7 C12H12N2Br2
RTECS # JM5690000 Molecular mass: 344.1
UN # 2781
EC # 613-089-00-1
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Not combustible. Liquid formulations containing organic solvents may be flammable. Gives off irritating or toxic fumes (or gases) in a fire.

In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Cough. Sore throat. Nosebleeds.
Local exhaust or breathing protection.
Fresh air, rest. Refer for medical attention.
Skin Redness.
Protective gloves. Protective clothing.
First rinse with plenty of water, then remove contaminated clothes and rinse again. Refer for medical attention.
Eyes Redness. Pain.
Safety goggles, or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Nausea. Vomiting. Ulcerations in the mouth. Abdominal pain. Diarrhoea. (Further see Inhalation).
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Give plenty of water to drink, or bentonite clay in water, or give a slurry of activated charcoal in water to drink. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment. (Extra personal protection: P3 filter respirator for toxic particles.)
Do not transport with food and feedstuffs.
EU Classification
Symbol: T+, N
R: 22-26-36/37/38-43-48/25-50/53
S: (1/2-)-22-28-36/37/39-45-60-61
UN Classification
UN Hazard Class: 6.1
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT7-III
Provision to contain effluent from fire extinguishing. Well closed. Separated from food and feedstuffs.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 1999

SEE IMPORTANT INFORMATION ON BACK


DIQUAT DIBROMIDE ICSC: 1363
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS TO YELLOW CRYSTALS

CHEMICAL DANGERS:
The substance decomposes on heating at 335C, producing toxic fumes including nitrogen oxides and hydrogen bromide.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: as Diquat, inhalable fraction 0.5 mg/m (skin) A4 (ACGIH 2001).
TLV: as Diquat, respirable fraction 0.1 mg/m (skin) A4 (ACGIH 2001).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion.

INHALATION RISK:
Evaporation at 20C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying or when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes, the skin and the respiratory tract. The substance may cause effects on the kidneys, liver, cardiovascular system and gastrointestinal tract, resulting in impaired functions and tissue lesions. Exposure to high concentrations may result in death.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The substance may have effects on the eyes, resulting in cataract.
PHYSICAL PROPERTIES
Decomposes below melting point at 335C
Density: 1.2 g/cm^3
Solubility in water, g/100 ml at 20C: 70
Vapour pressure, Pa at C: <0.0001
Octanol/water partition coefficient as log Pow: -4.60 at 20 C
ENVIRONMENTAL DATA
The substance is harmful to aquatic organisms. 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 diquat dibromide monohydrate (CAS 6385-62-2) and diquat (CAS 2764-72-9).
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.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor 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
IPCS, CEC 1999
See Also:
        Diquat (PDS)
        Diquat (PIM 580F, French)
        Paraquat and diquat (EHC 39, 1984)