# NIOSH Pocket Guide to Chemical Hazards
DDT | CAS 50-29-3
(C6H4Cl)2CHCCl3 | RTECS KJ3325000
Synonyms & Trade Names p,p'-DDT; Dichlorodiphenyltrichloroethane; 1,1,1-Trichloro-2,2-bis(p-chlorophenyl)ethane | DOT ID & Guide 2761 151
Exposure Limits | NIOSH REL: Ca TWA 0.5 mg/m3 See Appendix A
OSHA PEL: TWA 1 mg/m3 [skin]
IDLH Ca [500 mg/m3] | Conversion
Physical Description Colorless crystals or off-white powder with a slight, aromatic odor. [pesticide]
MW: 354.5 | BP: 230°F (Decomposes) | MLT: 227°F | Sol: Insoluble
VP: 0.0000002 mmHg | IP: ? |  | Sp.Gr: 0.99
Fl.P: 162-171°F | UEL: ? | LEL: ? |
Combustible Solid
Incompatibilities & Reactivities Strong oxidizers, alkalis
Measurement Methods NIOSH S274 (II-3)
Personal Protection & Sanitation 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 a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
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]
See also: INTRODUCTION