Methoxychlor is a white crystalline solid which is often dissolved in a liquid carrier such as diesel oil. It can cause illness by inhalation, skin absorption and/or ingestion. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. If dissolved in a liquid carrier, it can easily penetrate the soil and contaminate groundwater and nearby streams. It is used as a pesticide.

none

Insoluble in water.

Special Hazards of Combustion Products: Irritating and toxic hydrogen chloride gas may be formed in fire. (USCG, 1999)

Toxicity is relatively low. Inhalation or ingestion causes generalized depression. (USCG, 1999)

METHOXYCHLOR turns pink or tan on exposure to light. This chemical is incompatible with alkaline materials, especially in the presence of catalytically-active metals. It is slightly corrosive to iron and aluminum. It is decomposed by refluxing with sodium in isopropyl alcohol. It is also incompatible with strong oxidizers. It will attack some forms of plastics, rubber and coatings. (NTP, 1992).

• Ethers
• Halogenated Organic Compounds

No information available.

Excerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]:

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)

Excerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]:

CAUTION: Fire involving Safety devices (UN3268) and Fire suppressant dispersing devices (UN3559) may have a delayed activation and a risk of hazardous projectiles. Extinguish the fire at a safe distance.

SMALL FIRE: Dry chemical, CO2, water spray or regular foam.

LARGE FIRE: Water spray, fog or regular foam. Do not scatter spilled material with high-pressure water streams. If it can be done safely, move undamaged containers away from the area around the fire. Dike runoff from fire control for later disposal.

FIRE INVOLVING TANKS: Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks in direct contact with flames. (ERG, 2024)

Excerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]:

Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent dust cloud. For Asbestos, avoid inhalation of dust. Cover spill with plastic sheet or tarp to minimize spreading. Do not clean up or dispose of, except under supervision of a specialist.

SMALL DRY SPILL: With clean shovel, place material into clean, dry container and cover loosely; move containers from spill area.

SMALL SPILL: Pick up with sand or other non-combustible absorbent material and place into containers for later disposal.

LARGE SPILL: Dike far ahead of liquid spill for later disposal. Cover powder spill with plastic sheet or tarp to minimize spreading. Prevent entry into waterways, sewers, basements or confined areas. (ERG, 2024)

Excerpt from NIOSH Pocket Guide for Methoxychlor:

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

Eyes: No recommendation is made specifying the need for eye protection.

Wash skin:
• WHEN CONTAMINATED - The worker should immediately wash the skin when it becomes contaminated.
• DAILY - The worker should wash daily at the end of each work shift, and prior to eating, drinking, smoking, etc.

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)

No information available.

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. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.

INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. 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, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician. 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)

• BENZENE, 1,1'-(2,2,2-TRICHLOROETHYLIDENE)BIS [4-METHOXY-
• BENZENE, 1,1'-(2,2,2-TRICHLOROETHYLIDENE)BIS(4-METHOXY-
• 2,2-BIS(4-METHOXYPHENYL)-1,1,1-TRICHLOROETHANE
• 2,2-BIS(P-ANISYL)-1,1,1-TRICHLOROETHANE
• 2,2-BIS(P-METHOXYPHENYL)-1,1,1-TRICHLOROETHANE
• 1,1-BIS(P-METHOXYPHENYL)-2,2,2-TRICHLOROETHANE
• 2,2-BIS-(P-METHOXYPHENYL)-1,1,1-TRICHLOROETHANE
• CHEMFORM
• DI(P-METHOXYPHENYL)(TRICHLOROMETHYL)METHANE
• DI(P-METHOXYPHENYL)TRICHLOROMETHYL METHANE
• 2,2-DI-(P-METHOXYPHENYL)-1,1,1-TRICHLOROETHANE
• 2,2-DI-P-ANISYL-1,1,1-TRICHLOROETHANE
• DIANISYLTRICHLORETHANE
• DIMETHOXY-DDT
• DIMETHOXY-DT
• DMDT
• DOUBLE-M EC
• ENT 1,716
• ETHANE, 1,1,1-TRICHLORO-2,2-BIS(P-METHOXYPHENYL)-
• ETHANE, 2,2-BIS(P-ANISYL)-1,1,1-TRICHLORO-
• FLO PRO MCSEED PROTECTANT
• MARALATE
• MARLATE
• MARLATE 50
• MESOX K
• METHOXCIDE
• METHOXO
• METHOXY DDT
• METHOXY-DDT
• METHOXYCHLOR
• METHOXYCHLOR 2 EC
• METHOXYCHLORE
• METOX
• METOX PLYNNY
• MEZOX K
• MOXIE
• NCI-C00497
• OMS 466
• P,P'-DIMETHOXYDIPHENYLFTRICHLOROETHANE
• P,P'-DIMETHOXYDIPHENYLTRICHLOROETHANE
• P,P'-DMDT
• P,P'-METHOXYCHLOR
• 2,2,2-TRICHLORO-1,1-BIS(4-METHOXYPHENYL)ETHANE
• 1,1,1-TRICHLORO-2,2-BIS(4-METHOXYPHENYL)ETHANE
• 1,1,1-TRICHLORO-2,2-BIS(P-ANISYL)ETHANE
• 1,1,1-TRICHLORO-2,2-BIS(P-METHOXYPHENOL)ETHANOL
• 1,1,1-TRICHLORO-2,2-BIS(P-METHOXYPHENYL)ETHANE
• 1,1,1-TRICHLORO-2,2-BIS-(P-METHOXYPHENYL)ETHANE
• 1,1,1-TRICHLORO-2,2-DI(4-METHOXYPHENYL)ETHANE
• 1,1'-(2,2,2-TRICHLOROETHYLIDENE)BIS(4-METHOXYBENZENE)
• 4,4'-(2,2,2-TRICHLOROETHYLIDENE)DIANISOLE
• 4,4-(2,2,2-TRICHLOROETHYLIDENE)DIANISOLE