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Heptachlor																				Related Pages
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)

FormulaC10H5Cl7
	Conversion
	IDLH
			Ca [35 mg/m3]See: 76448

Exposure Limits
			NIOSH RELCa 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 Weight373.4	
	Boiling Point293°F (Decomposes)
	Melting Point203°F
	Solubility0.0006%
	Vapor Pressure(77°F): 0.0003 mmHg
	Ionization Potential?											
Specific Gravity1.66	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
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 NIOSH Pocket Guide to Chemical Hazards
Introduction
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CAS Numbers
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Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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