MALATHION

Yellow to dark-brown liquid with a skunk-like odor. Sinks in water. Freezing point is 37°F. (USCG, 1999)

none

Insoluble in water.

Special Hazards of Combustion Products: Vapors and fumes from fires are hazardous. They include sulfur dioxide and phosphoric acid.

Behavior in Fire: Gives off hazardous fumes. Area surrounding fire should be diked to prevent water runoff. (USCG, 1999)

Exposure to fumes from a fire or to liquid causes headache, blurred vision, constricted pupils of the eyes, weakness, nausea, cramps, diarrhea, and tightness in the chest. Muscles twitch and convulsions may follow. The symptoms may develop over a period of 8 hours. (USCG, 1999)

MALATHION is a yellow to brown liquid that solidifies at 2.9°C, moderately toxic. Organic phosphate insecticide, acts as an inhibitor of cholinesterase. When heated to decomposition it emits toxic fumes of oxides of sulfur and phosphorus [Lewis, 3rd ed., 1993, p. 789].

• Esters, Sulfate Esters, Phosphate Esters, Thiophosphate Esters, and Borate Esters

No information available.

Excerpt from ERG Guide 152 [Substances - Toxic (Combustible)]:

IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.

SPILL: Increase the immediate precautionary measure distance, in the downwind direction, as necessary.

FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024)

Fire Extinguishing Agents: Dry chemical, carbon dioxide, water spray, foam (USCG, 1999)

Neutralizing Agents for Acids and Caustics: Liquid bleach solution for decontamination. (USCG, 1999)

Excerpt from NIOSH Pocket Guide for Malathion:

Skin: PREVENT SKIN CONTACT - Wear appropriate personal protective clothing to prevent skin contact.

Eyes: PREVENT EYE CONTACT - Wear appropriate eye protection to prevent eye contact.

Wash skin: WHEN CONTAMINATED - The worker should immediately wash the skin when it becomes contaminated.

Remove: WHEN WET OR CONTAMINATED - Work clothing that becomes wet or significantly contaminated should be removed and replaced.

Change: DAILY - Workers whose clothing may have become contaminated should change into uncontaminated clothing before leaving the work premises. (NIOSH, 2024)

Normalized Breakthrough Times (in Minutes)

Chemical	CAS Number	State	QS	QC	SL	C3	TF	TP	RC	TK	RF
Malathion	121-75-5	Liquid							>480	>480	>480

Special Warning from DuPont: Tychem® and Tyvek® fabrics should not be used around heat, flames, sparks or in potentially flammable or explosive environments. Only...

(DuPont, 2024)

EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas.

INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing.

INGESTION: DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, administer a slurry of activated charcoal in water and simultaneously call a hospital or poison control center. IMMEDIATELY transport the victim to a hospital. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)

• AMERICAN CYANAMID 4,049
• CALMATHION
• CARBETHOXY MALATHION
• CARBETOVUR
• CARBETOX
• CARBOFOS
• CARBOPHOS
• CELTHION
• CHEMATHION
• CIMEXAN
• COMPOUND 4049
• CYTHION
• CYTHION INSECTICIDE
• DETMOL MA
• DETMOL MA 96%
• 1,2-DI(ETHOXYCARBONYL)ETHYL O,O-DIMETHYL PHOSPHORODITHIOATE
• DICARBOETHOXYETHYL O,O-DIMETHYL PHOSPHORODITHIOATE
• DIETHYL (DIMETHOXYPHOSPHINOTHIOYLTHIO) BUTANEDIOATE
• DIETHYL (DIMETHOXYPHOSPHINOTHIOYLTHIO) SUCCINATE
• DIETHYL (DIMETHOXYPHOSPHINOTHIOYLTHIO)SUCCINATE
• DIETHYL MERCAPTOSUCCINATE S-ESTER WITH O,O-DIMETHYL PHOSPHORODITHIOATE
• DIETHYL MERCAPTOSUCCINATE S-ESTER WITH O,O-DIMETHYLPHOSPHORODITHIOATE
• DIETHYL MERCAPTOSUCCINATE, O,O-DIMETHYL DITHIOPHOSPHATE, S-ESTER
• DIETHYL MERCAPTOSUCCINATE, O,O-DIMETHYL PHOSPHORODITHIOATE
• DIETHYL MERCAPTOSUCCINATE, O,O-DIMETHYL THIOPHOSPHATE
• DIETHYL MERCAPTOSUCCINIC ACID O,O-DIMETHYL PHOSPHORODITHIOATE
• ((DIMETHOXYPHOSPHINOTHIOYL)THIO)BUTANEDIOIC ACID DIETHYL ESTER
• [(DIMETHOXYPHOSPHINOTHIOYL)THIO]BUTANEDIOIC ACID DIETHYL ESTER
• EMMATOS
• ENT 17,034
• ETHIOLACAR
• ETIOL
• EXTERMATHION
• FORMAL
• FORTHION
• FOSFOTHION
• FOSFOTION
• FYFANON
• 8059HC
• HILTHION
• IFO 13140
• INSECTICIDE 4049
• INSECTICIDE NO. 4049
• KARBOFOS
• KOP-THION
• MALACIDE
• MALAFOR
• MALAGRAN
• MALAMAR
• MALAMAR 50
• MALASOL
• MALASPRAY
• MALATAF
• MALATHINE
• MALATHION
• MALATHION E 50
• MALATHION LV CONCENTRATE
• MALATHON
• MALATHYL
• MALATHYNE
• MALATOL
• MALDISON
• MAVIDAN
• MERCAPTOSUCCINIC ACID DIETHYL ESTER
• MERCAPTOSUCCINIC ACID, DIETHYL ESTER, S-ESTER WITH O,O-DIMETHYL PHOSPHORO-DITHIOATE
• MERCAPTOTHION
• MLT
• MOSCARDA
• NCI-C00215
• O,O-DIMETHYL S-(1,2-DICARBETHOXYETHYL) DITHIOPHOSPHATE
• O,O-DIMETHYL S-1,2-DI(ETHOXYCARBAMYL)ETHYL PHOSPHORODITHIOATE
• O,O-DIMETHYL-S-(1,2-BIS(ETHOXYCARBONYL)ETHYL)DITHIOPHOSPHATE
• O,O-DIMETHYL-S-(1,2-DICARBETHOXYETHYL) DITHIOPHOSPHATE
• O,O-DIMETHYL-S-(1,2-DICARBETHOXYETHYL) THIOTHIONOPHOSPHATE
• O,O-DIMETHYL-S-(1,2-DICARBETHOXYETHYL)PHOSPHORODITHIOATE
• O,O-DIMETHYLDITHIOPHOSPHATE DIETHYLMERCAPTOSUCCINATE
• OLEOPHOSPHOTHION
• ORTHO MALATHION
• PHOSPHORODITHIOIC ACID, O,O-DIMETHYL ESTER, S-ESTER WITH DIETHYL MERCAPTOSUCCINATE
• PHOSPHOTHION
• PRIODERM
• S-(1,2-BIS(CARBETHOXY)ETHYL) O,O-DIMETHYL DITHIOPHOSPHATE
• S-(1,2-BIS(ETHOXYCARBONYL)ETHYL O,O-DIMETHYLPHOSPHORODITHIOATE
• S-(1,2-DI(ETHOXYCARBONYL)ETHYL) DIMETHYLPHOSPHOROTHIOLOTHIONATE
• S-(1,2-DICARBETHOXYETHYL) O,O-DIMETHYLDITHIOPHOSPHATE
• S-1,2-BIS(ETHOXYCARBONYL)ETHYL-O,O-DIMETHYL THIOPHOSPHATE
• S-[1,2-BIS(CARBETHOXY)ETHYL] O,O-DIMETHYL DITHIOPHOSPHATE
• S-[1,2-BIS(ETHOXYCARBONYL) ETHYL]O,O-DIMETHYL-PHOSPHORODITHIOATE
• S-[1,2-BIS(ETHOXYCARBONYL)ETHYL] O,O-DIMETHYL PHOSPHORODITHIOATE
• S-[1,2-BIS(ETHOXYCARBONYL)ETHYL] O,O-DIMETHYL THIOPHOSPHATE
• SADOFOS
• SADOPHOS
• SECURITY
• SF 60
• SIPTOX I
• SUCCINIC ACID, MERCAPTO-, DIETHYL ESTER, S-ESTER WITH O,O-DIMETHYL PHOSPHORODITHIOATE
• SUMITOX
• TAK
• TAK (PESTICIDE)
• TM 4049
• VETIOL
• ZITHIOL