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Heptachlor

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Synonyms & Trade Names
1,4,5,6,7,8,8-Heptachloro-3a,4,7,7a-tetrahydro-4,7-methanoindene
CAS No.
76-44-8
RTECS No.
PC0700000
DOT ID & Guide
2761 151(organochlorine pesticide, solid)
Formula
C₁₀H₅Cl₇
Conversion
IDLH
Ca [35 mg/m3]
See: 76448
Exposure Limits
NIOSH REL
Ca TWA 0.5 mg/m3 [skin] See Appendix A
OSHA PEL
TWA 0.5 mg/m3 [skin]
Measurement Methods
NIOSH S287 (II-5);
OSHA PV2029
See: NMAM or OSHA Methods
Physical Description
White to light-tan crystals with a camphor-like odor. [insecticide]
Molecular Weight
373.4
Boiling Point
293°F (Decomposes)
Melting Point
203°F
Solubility
0.0006%
Vapor Pressure
(77°F): 0.0003 mmHg
Ionization Potential
?
Specific Gravity
1.66
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Noncombustible Solid, but may be dissolved in flammable liquids.
Incompatibilities & Reactivities
Iron, rust
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
In Animals: tremor, convulsions; liver damage; [potential occupational carcinogen]
Target Organs
central nervous system,liver
Cancer Site
[in animals: liver cancer]
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 having an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0743
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health