# NIOSH Pocket Guide to Chemical Hazards
Captan | CAS 133-06-2
C9H8Cl3NO2S | RTECS GW5075000
Synonyms & Trade Names Captane; N-Trichloromethylmercapto-4-cyclohexene-1,2-dicarboximide | DOT ID & Guide 9188 171
Exposure Limits | NIOSH REL: Ca TWA 5 mg/m3 See Appendix A
OSHA PEL†: none
IDLH Ca [N.D.] | Conversion
Physical Description Odorless, white, crystalline powder. [fungicide] [Note: Commercial product is a yellow powder with a pungent odor.]
MW: 300.6 | BP: Decomposes | MLT: 352°F (Decomposes) | Sol(77°F): 0.0003%
VP: 0 mmHg (approx) | IP: NA |  | Sp.Gr: 1.74
Fl.P: ? | UEL: ? | LEL: ? |
Combustible Solid; may be dissolved in flammable liquids.
Incompatibilities & Reactivities Strong alkaline materials (e.g., hydrated lime) [Note: Corrosive to metals.]
Measurement Methods NIOSH 5601
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 immediately 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 Irritation eyes, skin, upper respiratory system; blurred vision; dermatitis, skin sensitization; dyspnea (breathing difficulty); diarrhea, vomiting; [potential occupational carcinogen]
Target Organs Eyes, skin, respiratory system, gastrointestinal tract, liver, kidneys Cancer Site [in animals: duodenal tumors]
See also: INTRODUCTION