# NIOSH Pocket Guide to Chemical Hazards
Pentachlorophenol | CAS 87-86-5
C6Cl5OH | RTECS SM6300000
Synonyms & Trade Names PCP; Penta; 2,3,4,5,6-Pentachlorophenol | DOT ID & Guide 3155 154
Exposure Limits | NIOSH REL: TWA 0.5 mg/m3 [skin]
OSHA PEL: TWA 0.5 mg/m3 [skin]
IDLH 2.5 mg/m3 | Conversion
Physical Description Colorless to white, crystalline solid with a benzene-like odor. [fungicide]
MW: 266.4 | BP: 588°F (Decomposes) | MLT: 374°F | Sol: 0.001%
VP(77°F): 0.0001 mmHg | IP: NA |  | Sp.Gr: 1.98
Fl.P: NA | UEL: NA | LEL: NA |
Noncombustible Solid
Incompatibilities & Reactivities Strong oxidizers, acids, alkalis
Measurement Methods NIOSH 5512
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: Daily Provide: Eyewash, Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA Up to 2.5 mg/m3: (APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s) in combination with a dust, mist, and fume filter*/(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s) in combination with a dust, mist, and fume filter*/(APF = 10) Any supplied-air respirator*/(APF = 50) Any self-contained breathing apparatus with a full facepiece Emergency or planned entry into unknown concentrations or IDLH conditions: (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, nose, throat; sneezing, cough; lassitude (weakness, exhaustion), anorexia, weight loss; sweating; headache, dizziness; nausea, vomiting; dyspnea (breathing difficulty), chest pain; high fever; dermatitis
Target Organs Eyes, skin, respiratory system, cardiovascular system, liver, kidneys, central nervous system
See also: INTRODUCTION