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DDT

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Synonyms & Trade Names
p,p'-DDT, Dichlorodiphenyltrichloroethane, 1,1,1-Trichloro-2,2-bis(p-chlorophenyl)ethane
CAS No.
50-29-3
RTECS No.
KJ3325000
DOT ID & Guide
2761 151
Formula
(C₆H₄Cl)₂CHCCl₃
Conversion
IDLH
Ca [500 mg/m3]
See: 50293
Exposure Limits
NIOSH REL
Ca TWA 0.5 mg/m3 See Appendix A
OSHA PEL
TWA 1 mg/m3 [skin]
Measurement Methods
NIOSH S274 (II-3)
See: NMAM or OSHA Methods
Physical Description
Colorless crystals or off-white powder with a slight, aromatic odor. [pesticide]
Molecular Weight
354.5
Boiling Point
230°F (Decomposes)
Melting Point
227°F
Solubility
Insoluble
Vapor Pressure
0.0000002 mmHg
Ionization Potential
?
Specific Gravity
0.99
Flash Point
162-171°F
Upper Explosive Limit
?
Lower Explosive Limit
?
Combustible Solid
Incompatibilities & Reactivities
Strong oxidizers, alkalis
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin; paresthesia tongue, lips, face; tremor; anxiety, dizziness, confusion, malaise (vague feeling of discomfort), headache, lassitude (weakness, exhaustion); convulsions; paresis hands; vomiting; [potential occupational carcinogen]
Target Organs
Eyes, skin, central nervous system, kidneys, liver, peripheral nervous system
Cancer Site
[in animals: liver, lung & lymphatic tumors]
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated/Daily
Remove:When wet or contaminated
Change:Daily
Provide:Eyewash, Quick drench
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash promptly
Breathing:Respiratory support
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: 0034   MEDICAL TESTS: 0065
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health