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NIOSH

DIQUAT DIBROMIDE

ICSC: 1363

1,1'-Ethylene-2,2'-bipyridyllium dibromide
6,7-Dihydrodipyridol1,2-a2',1-cpyrazinedium dibromide
9,10-Dihydro-8a-10a-diazoniaphenanthrene dibromide
C12H12N2Br2
Molecular mass: 344.1
ICSC # 1363 		CAS # 85-00-7
RTECS # JM5690000
UN # 2781
EC # 613-089-00-1
October 16, 2001 Validated

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

STORAGE

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. Personal protection: P3 filter respirator for toxic particles.
Provision to contain effluent from fire extinguishing. Well closed. Separated from food and feedstuffs.
Do not transport with food and feedstuffs.
T+ symbol
N symbol
R: 22-26-36/37/38-43-48/25-50/53
S: 1/2-28-36/37/39-45-60-61
UN Hazard Class: 6.1
UN Packing Group: III
ICSC: 1363 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.

DIQUAT DIBROMIDE

ICSC: 1363

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
COLOURLESS TO YELLOW CRYSTALS

PHYSICAL DANGERS:


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

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as Diquat, inhalable fraction) 0.5 mg/m3 as TWA; TLV: (as Diquat, respirable fraction) 0.1 mg/m3 as TWA; (skin); A4; (ACGIH 2004).
OSHA PEL†: none
NIOSH REL: TWA 0.5 mg/m3
NIOSH IDLH: N.D. See: IDLH INDEX


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 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on sprayingorwhen 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 335°C
Density: 1.2
g/cm3
Solubility in water, g/100 ml at 20°C: 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.

N O T E S

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. Card has been partly updated in October 2004. See sections Occupational Exposure Limits, EU classification, Emergency Response.
Transport Emergency Card: TEC (R)-61GT7-III

ADDITIONAL INFORMATION



ICSC: 1363 DIQUAT DIBROMIDE
(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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