ICSC 0033 - 2,4-D

2,4-D	ICSC: 0033 (October 2005)
2,4-Dichlorophenoxyacetic acid 2,4-D acid

CAS #: 94-75-7

UN #: 3077

EC Number: 202-361-1

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Not combustible. Liquid formulations containing organic solvents may be flammable. Gives off irritating or toxic fumes (or gases) in a fire.	NO contact with oxidizing agents.	In case of fire in the surroundings, use appropriate extinguishing media.

STRICT HYGIENE!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Headache. Nausea. Weakness. Cough. Sore throat.	Use local exhaust or breathing protection.	Fresh air, rest. Refer for medical attention.
Skin	Redness.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes	Redness. Pain.	Wear 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 refer for medical attention.
Ingestion	Abdominal pain. Burning sensation. Diarrhoea. Headache. Nausea. Vomiting. Weakness. Unconsciousness.	Do not eat, drink, or smoke during work. Wash hands before eating.	Rinse mouth. Give a slurry of activated charcoal in water to drink. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered plastic containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 9; UN Pack Group: III
STORAGE
Store in an area without drain or sewer access. Separated from strong oxidants and food and feedstuffs.
PACKAGING
Do not transport with food and feedstuffs. Marine pollutant.

2,4-D

ICSC: 0033

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS CRYSTALS OR WHITE POWDER. Physical dangers Chemical dangers Decomposes on heating. This produces toxic fumes including hydrogen chloride. Reacts with strong oxidants. This generates fire and explosion hazard. Attacks some forms of coating and metals.	Formula: C₈H₆Cl₂O₃ / Cl₂C₆H₃OCH₂COOH Molecular mass: 221.0 Boiling point: No boiling point at normal pressure; decomposes on heating Melting point: 140°C Relative density (water = 1): 0.7-0.8 Solubility in water, g/100ml at 25°C: 0.031 (very poor) Vapour pressure, Pa at 25°C: 0.01 (negligible) Octanol/water partition coefficient as log Pow: 2.81

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS CRYSTALS OR WHITE POWDER.

Physical dangers

Chemical dangers
Decomposes on heating. This produces toxic fumes including hydrogen chloride. Reacts with strong oxidants. This generates fire and explosion hazard. Attacks some forms of coating and metals.

Formula: C₈H₆Cl₂O₃ / Cl₂C₆H₃OCH₂COOH
Molecular mass: 221.0
Boiling point: No boiling point at normal pressure; decomposes on heating
Melting point: 140°C
Relative density (water = 1): 0.7-0.8
Solubility in water, g/100ml at 25°C: 0.031 (very poor)
Vapour pressure, Pa at 25°C: 0.01 (negligible)
Octanol/water partition coefficient as log Pow: 2.81

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion. Effects of short-term exposure The substance is irritating to the skin, respiratory tract and eyes. Exposure at high levels could cause effects on the nervous system.	Inhalation risk A harmful concentration of airborne particles can be reached quickly on spraying or when dispersed, especially if powdered. Effects of long-term or repeated exposure See Notes.

EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion.

Effects of short-term exposure
The substance is irritating to the skin, respiratory tract and eyes. Exposure at high levels could cause effects on the nervous system.

Inhalation risk
A harmful concentration of airborne particles can be reached quickly on spraying or when dispersed, especially if powdered.

Effects of long-term or repeated exposure
See Notes.

OCCUPATIONAL EXPOSURE LIMITS
TLV: (inhalable fraction): 10 mg/m³, as TWA; A4 (not classifiable as a human carcinogen). MAK: (inhalable fraction): 2 mg/m³; peak limitation category: II(2); skin absorption (H); pregnancy risk group: C

ENVIRONMENT
The substance is harmful to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal.

NOTES
2,4-D is a chlorophenoxy-herbicide which, as a group, has been classified by IARC (1987) as possibly carcinogenic to humans, but the data on this specific substance are inconclusive. Carrier solvents used in commercial formulations may change physical and toxicological properties.

ADDITIONAL INFORMATION

EC Classification
Symbol: Xn; R: 22-37-41-43-52/53; S: (2)-24/25-26-36/37/39-46-61

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    See Also:
       Toxicological Abbreviations