September 2010
NIOSH Publication Number 2010-168c

Captan

Synonyms & Trade Names
Captane; N-Trichloromethylmercapto-4-cyclohexene-1,2-dicarboximide
CAS No.
133-06-2
RTECS No.
GW5075000
DOT ID & Guide
Formula
C9H8Cl3NO2S
Conversion
IDLH
Ca [N.D.]
See: IDLH INDEX
Exposure Limits
NIOSH REL
: Ca TWA 5 mg/m3 See Appendix A
OSHA PEL
†: none
Measurement Methods

NIOSH 9205
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.]
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]
Personal Protection/Sanitation
(See protection codes)
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

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0120