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
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)

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]