# NIOSH Pocket Guide to Chemical Hazards
p-Dichlorobenzene | CAS 106-46-7
C6H4Cl2 | RTECS CZ4550000
Synonyms & Trade Names p-DCB; 1,4-Dichlorobenzene; para-Dichlorobenzene; Dichlorocide | DOT ID & Guide 1592 152
Exposure Limits | NIOSH REL: Ca See Appendix A
OSHA PEL†: TWA 75 ppm (450 mg/m3)
IDLH Ca [150 ppm] | Conversion 1 ppm = 6.01 mg/m3
Physical Description Colorless or white crystalline solid with a mothball-like odor. [insecticide]
MW: 147.0 | BP: 345°F | MLT: 128°F | Sol: 0.008%
VP: 1.3 mmHg | IP: 8.98 eV |  | Sp.Gr: 1.25
Fl.P: 150°F | UEL: ? | LEL: 2.5% |
Combustible Solid, but may take some effort to ignite.
Incompatibilities & Reactivities Strong oxidizers (such as chlorine or permanganate)
Measurement Methods NIOSH 1003; OSHA 7
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 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/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Eye irritation, swelling periorbital (situated around the eye); profuse rhinitis; headache, anorexia, nausea, vomiting; weight loss, jaundice, cirrhosis; in animals: liver, kidney injury; [potential occupational carcinogen]
Target Organs Liver, respiratory system, eyes, kidneys, skin Cancer Site [in animals: liver & kidney cancer]
See also: INTRODUCTION