Methoxychlor

  • p,p'-Dimethoxydiphenylftrichloroethane
  • 1,1,1-Trichloro-2,2-bis-(p-methoxyphenyl)ethane
  • 2,2-bis(p-Methoxyphenyl)-1,1,1-Trichloroethane
  • Methoxy-DDT
Formula
C16H15Cl3O2
Structure
Description
A white crystalline solid.
Uses
Insecticide.

Registry Numbers and Inventories.
CAS
72-43-5
EC (EINECS/ELINCS)
200-779-9
RTECS
KJ3675000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Human Data
UN (DOT)
2761
Merck
12,6070
Beilstein/Gmelin
2057367
Beilstein Reference
4-06-00-06691
RCRA
U247
EPA OPP
34001
Swiss Giftliste 1
G-2413
Canada DSL/NDSL
DSL
Austrailia AICS
Listed

Properties.
Formula
C16H15Cl3O2
Formula mass
345.65
Melting point, °C
96
Boiling point, °C
436
Vapor pressure, mmHg
2E-7 (25 C)
Odor Threshold Odor threshold 4.7 mg/kg in water
Density
1.39 g/cm3
Solubility in water
0.1 mg/L
Partition coefficient, pKow
5.08
Heat of vaporization
66.6 kJ/mol

Hazards and Protection.
Storage
Keep in well ventilated area.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Self-contained breathing apparatus must be worn. Rubber gloves, hats, suits and boots must be worn.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Use natural deep water pockets, excavated lagoons, or sand bag barriers to trap material at bottom. If dissolved, in region of 10 ppm or greater concentration, apply activated carbon at ten times the spilled amount. Remove trapped material with suction hoses. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
Stability
Stable to UV light. Color turns to pink or tan on exposure to light.
Incompatibilities
Incompatible with alkaline materials, especially in the presence of catalytically-active metals Corrosive to iron and aluminum Incompatible with strong oxidizers.
Decomposition
When heated to decomposition, it emits highly toxic fumes of hydrogen chloride. Toxic gases and vapors (such as hydrogen chloride and carbon monoxide) may be released when methoxychlor decomposes.

Fire.
Flash Point,°C
149
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.)
Fire potential
Nonflammable under practical conditions; will burn only at substantially elevated temperatures. Liquid forms may be in flammable solvents.
Combustion products
Irritating and toxic hydrogen chloride gas may be formed in fire.

Health.
Exposure limit(s)
NIOSH REL: Ca See Appendix A OSHA PEL: TWA 15 mg/m3 IDLH Ca [5000 mg/m3]
Poison_Class
4
Exposure effects
CNS excitation, seizures, tremor, ataxia, agitation, nervousness, and amnesia may occur. Kelthane, perthane, methoxychlor, and hexachlorobenzene have little CNS toxicity; in extreme overdose CNS depression may occur. Organochlorine pesticides such as DDT pass through the placenta, with an average level in the newborn blood reaching around a third of that in maternal blood. They can also be found in breast milk. Excessive absorption of kepone (chlordecone) has depressed sperm counts and sperm motility in exposed workers.
   Ingestion
Nausea, vomiting, and diarrhea may follow ingestion.
   Inhalation
Aspiration of insecticide containing petroleum distillate may result in pneumonitis.
   Skin
Extensive contact results in dermal irritation.
   Eyes
See Inhalation.

First aid
 
   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.
   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.
   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.
   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.

Transport.
UN number
2761
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
MOC
 
Std. Transport #
4960647