OSHA/EPA Occupational Chemical Database

Chemical Identification
Chemical Name: HEPTACHLOR
CAS #: 76-44-8 UN No: 2761 Formula: C10H5Cl7
Synonyms: 1,4,5,6,7,8,8-Heptachloro-3a,4,7,7a-tetrahydro-4,7-methanoindene

Physical Properties
Physical Description: White to light-tan crystals with a camphor-like odor. [insecticide]
BP: 293F (Decomposes) MW: 373.4 LEL: NA NFPA Fire Rating: NA
FRZ/MLT: MLT: 203F VP: (77F): 0.0003 mmHg UEL: NA NFPA Health Rating: NA
FP: NA VD: NA NFPA Reactivity Rating: NA
Sp. GR: 1.66 IP: NA NFPA Sp. Inst.: NA

Exposure Limits
OSHA NIOSH Related Information
PEL-TWA ppm: NA REL-TWA ppm: NA AIHA Emergency Response Planning Guidelines - ERPG-1/ERPG-2/ERPG-3:
PEL-TWA mg/m3: 0.5 REL-TWA mg/m3: 0.5
PEL-STEL mg/m3: NA REL-STEL mg/m3: NA
PEL-C ppm: NA REL-C ppm: NA
PEL-C mg/m3: NA REL-C mg/m3: NA Carcinogen Classifications: IARC-2B, NIOSH-Ca, TLV-A3
Skin Notation: Yes Skin Notation: Yes
Notes: NA Notes: CARCINOGEN (Ca)

IDLH ppm: NA

IDLH mg/m3: 35

IDLH Notes: Ca

NIOSH Pocket Guide to Chemical Hazards (Current through June 2006)
Heptachlor CAS: 76-44-8
Formula: C10H5Cl7 RTECS: PC0700000
Synonyms & Trade Names: 1,4,5,6,7,8,8-Heptachloro-3a,4,7,7a-tetrahydro-4,7-methanoindene DOT ID & Guide: 2761 151 (organochlorine pesticide, solid)
Exposure Limits
NIOSH REL: Ca TWA 0.5 mg/m3 [skin] See Appendix A OSHA PEL: TWA 0.5 mg/m3 [skin]
IDLH: Ca [35 mg/m3] Conversion: NA
Physical Description
White to light-tan crystals with a camphor-like odor. [insecticide]
MW: 373.4 BP: 293F (Decomposes) MLT: 203F Sol: 0.0006%
VP(77F): 0.0003 mmHg IP: ? RGasD: NA Sp.Gr: 1.66
Noncombustible Solid, but may be dissolved in flammable liquids. (See flammable and combustible liquid classes)
Incompatibilities & Reactivities
Iron, rust
Measurement Methods
NIOSH S287 (II-5); OSHA PV2029
Personal Protection & Sanitation First Aid
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contam/Daily
Remove: When wet or contam
Change: Daily
Provide: Eyewash, Quick drench
Eye: Irr immed
Skin: Soap wash immed
Breath: Resp support
Swallow: Medical attention immed
(See procedures)
NIOSH Respirator Recommendations
(See symbols and codes)
Exposure Routes
Inh Abs Ing Con
In animals: tremor, convuls; liver damage; [carc]
(See abbreviations)
Target Organs
(See abbreviations)

DOT Emergency Response Guidebook (ERG 2004)
Guide Number: 151
151 Substances - Toxic (Non-Combustible)
*       Highly toxic, may be fatal if inhaled, swallowed or absorbed through
*       Avoid any skin contact.
*       Effects of contact or inhalation may be delayed.
*       Fire may produce irritating, corrosive and/or toxic gases.
*       Runoff from fire control or dilution water may be corrosive and/or
        toxic and cause pollution.
*       Non-combustible, substance itself does not burn but may decompose upon
        heating to produce corrosive and/or toxic fumes.
*       Containers may explode when heated.
*       Runoff may pollute waterways.
*       CALL Emergency Response Telephone Number on Shipping Paper first. If
        Shipping Paper not available or no answer, refer to appropriate
        telephone number listed on the inside back cover.
*       Isolate spill or leak area immediately for at least 25 to 50 meters
        (80 to 160 feet) in all directions.
*       Keep unauthorized personnel away.
*       Stay upwind.
*       Keep out of low areas.
*       Wear positive pressure self-contained breathing apparatus (SCBA).
*       Wear chemical protective clothing which is specifically recommended by
        the manufacturer. It may provide little or no thermal protection.
*       Structural firefighters' protective clothing provides limited
        protection in fire situations ONLY; it is not effective in spill
*       See the Table of Initial Isolation and Protective Action Distances for
        highlighted substances. For non-highlighted substances, increase, in
        the downwind direction, as necessary, the isolation distance shown
        under PUBLIC SAFETY.
*       If tank, rail car or tank truck is involved in a fire, ISOLATE for
        800 meters (1/2 mile) in all directions; also, consider initial
        evacuation for 800 meters (1/2 mile) in all directions.
Small Fires
*       Dry chemical, CO2 or water spray.
Large Fires
*       Water spray, fog or regular foam.
*       Move containers from fire area if you can do it without risk.
*       Dike fire control water for later disposal; do not scatter the
*       Use water spray or fog; do not use straight streams.
Fire involving Tanks or Car/Trailer Loads
*       Fight fire from maximum distance or use unmanned hose holders or
        monitor nozzles.
*       Do not get water inside containers.
*       Cool containers with flooding quantities of water until well after
        fire is out.
*       Withdraw immediately in case of rising sound from venting safety
        devices or discoloration of tank.
*       ALWAYS stay away from tanks engulfed in fire.
*       For massive fire, use unmanned hose holders or monitor nozzles; if this
        is impossible, withdraw from area and let fire burn.
*       Do not touch damaged containers or spilled material unless wearing
        appropriate protective clothing.
*       Stop leak if you can do it without risk.
*       Prevent entry into waterways, sewers, basements or confined areas.
*       Cover with plastic sheet to prevent spreading.
*       Absorb or cover with dry earth, sand or other non-combustible material
        and transfer to containers.
*       Move victim to fresh air.
*       Call 911 or emergency medical service.
*       Apply artificial respiration if victim is not breathing.
*       Do not use mouth-to-mouth method if victim ingested or inhaled the
        substance; induce artificial respiration with the aid of a pocket mask
        equipped with a one-way valve or other proper respiratory medical
*       Administer oxygen if breathing is difficult.
*       Remove and isolate contaminated clothing and shoes.
*       In case of contact with substance, immediately flush skin or eyes with
        running water for at least 20 minutes.
*       For minor skin contact, avoid spreading material on unaffected skin.
*       Keep victim warm and quiet.
*       Effects of exposure (inhalation, ingestion or skin contact) to
        substance may be delayed.
*       Ensure that medical personnel are aware of the material(s) involved,
        and take precautions to protect themselves.

Additional Emergency Response Information (CAMEO Data)
Non-fire Spill Response: Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Use natural deep water pockets, excavated lagoons, or sand bag barriers to trap material at bottom. If dissolved, in region of 10 ppm or greater concentration, apply activated carbon at ten times the spilled amount. Remove trapped material with suction hoses. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates. ( AAR, 1999)
Firefighting: Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide. If large quantities of combustibles are involved, use water in flooding quantities as spray and fog. ( AAR, 1999)
Reactivity: STABILITY: This chemical is stable under normal lab conditions. Solutions of this chemical in water, DMSO, 95% ethanol or acetone should be stable for 24 hours under normal lab conditions.REACTIVITY: This chemical is incompatible with strong alkali. It is corrosive to metals. It can react with iron and rust to form toxic gases. It can react vigorously with oxidizing materials. It is susceptible to epoxidation. (NTP, 1992)
First Aid: EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop. SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas. INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of Breathing, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing. INGESTION: If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Generally, the induction of vomiting is NOT recommended outside of a physician's care due to the risk of aspirating the chemical into the victim's lungs. However, if the victim is conscious and not convulsing and if medical help is not readily available, consider the risk of inducing vomiting because of the high toxicity of the chemical ingested. Ipecac syrup or salt water may be used in such an emergency. IMMEDIATELY transport the victim to a hospital. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the Headache lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. OTHER: Since this chemical is a known or suspected carcinogen you should contact a physician for advice regarding the possible long term health effects and potential recommendation for medical monitoring. Recommendations from the physician will depend upon the specific compound, its chemical, physical and toxicity properties, the exposure level, length of exposure, and the route of exposure. (NTP, 1992)