NIOSH logo and tagline

Methoxychlor

Related Pages
Synonyms & Trade Names
p,p'-Dimethoxydiphenyltrichloroethane, DMDT, Methoxy-DDT, 2,2-bis(p-Methoxyphenyl)-1,1,1-trichloroethane, 1,1,1-Trichloro-2,2-bis-(p-methoxyphenyl)ethane
CAS No.
72-43-5
RTECS No.
KJ3675000
DOT ID & Guide
2761 151(organochlorine pesticide, solid, toxic)
Formula
(C₆H₄OCH₃)₂CHCCl₃
Conversion
IDLH
Ca [5000 mg/m3]
See: 72435
Exposure Limits
NIOSH REL
Ca See Appendix A
OSHA PEL
TWA 15 mg/m3 See Appendix G
Measurement Methods
NIOSH S371 (II-4);
OSHA PV2038
See: NMAM or OSHA Methods
Physical Description
Colorless to light-yellow crystals with a slight, fruity odor. [insecticide]
Molecular Weight
345.7
Boiling Point
Decomposes
Melting Point
171°F
Solubility
0.00001%
Vapor Pressure
Very low
Ionization Potential
?
Specific Gravity
1.41
Flash Point
?
Upper Explosive Limit
?
Lower Explosive Limit
?
Combustible Solid, but difficult to burn.
Incompatibilities & Reactivities
Oxidizers
Exposure Routes
inhalation, ingestion
Symptoms
In Animals: fasciculation, trembling, convulsions; kidney, liver damage; [potential occupational carcinogen]
Target Organs
central nervous system, liver, kidneys
Cancer Site
[in animals: liver & ovarian cancer]
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:No recommendation
Wash skin:When contaminated/Daily
Remove:When wet or contaminated
Change:Daily
First Aid
(See procedures)

Skin:Soap wash
Breathing:Fresh air
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH

At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 1306
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health