Heptane

  • n-Heptane
  • Dipropyl methane
  • Heptyl hydride
Formula CH3(CH2)5CH3
Structure
Description Clear, colorless liquid with a mild gasoline-like odor.
Uses Research chemical, solvent.

Registry Numbers and Inventories.
CAS 142-82-5
EC (EINECS/ELINCS) 205-563-8
EC Index Number 601-008-00-2
EC Class Highly flammable; Harmful; Irritant; Vapours may cause drowsiness and dizziness; Dangerous for the Environment
EC Risk Phrase R 11 38 50/53 65 67
EC Safety Phrase S 9 16 29 33 60 61 62
RTECS MI7700000
RTECS class Drug; Human Data
UN (DOT) 1206
Merck 13,4679
Beilstein/Gmelin 1730763
Beilstein Reference 4-01-00-00376
Swiss Giftliste 1 G-1676
Canada DSL/NDSL DSL
US TSCA Listed
Austrailia AICS Listed
New Zealand Listed
Japan ENCS (MITI) Listed
Korea ECL Listed

Odor Threshold Odor threshold 200 mg/m3
Properties.
Formula C7H16
Formula mass 100.21
Melting point, °C -90.6
Boiling point, °C 98.4
Vapor pressure, mmHg 46 (25 C)
Vapor density (air=1) 3.5
Saturation Concentration 52640 ppm (5.26%) at 22.3 C (calculated)
Evaporization number 4.3 (butyl acetate=1)
Critical temperature 267
Critical pressure 27.7
Density 0.6838 g/cm3 (20 C)
Solubility in water 3 mg/L
Viscosity 0.408 cp (20 C)
Surface tension 20.21 g/s2 (20 C)
Refractive index 1.3855 (20 C)
Dipole moment 1.96 (25 C)
Dielectric constant 1.92 (20 C)
Partition coefficient, pKow 4.66
Heat of fusion 14.2 kJ/mol
Heat of vaporization 36.0 kJ/mol
Heat of combustion -4820 kJ/mol

Hazards and Protection.
Storage Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area.
WHMIS B2 D2B
Handling Wash thoroughly after handling. Use only in a well ventilated area. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear neoprene gloves, apron, and/or clothing. Use polyvinyl alcohol or fluorocarbon rubber (viton) gloves. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors.
Stability Stable under normal temperatures and pressures.
Incompatibilities Strong oxidizing agents.
Decomposition Carbon monoxide, carbon dioxide, oxides of carbon.

Fire.
Flash Point,°C -4
Autoignition, °C 204
Upper exp. limit, % 6.7
Lower exp. limit, % 1.05
Fire fighting Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Use water spray to keep fire-exposed containers cool. Water may be ineffective. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Water may be ineffective. Do NOT use straight streams of water. Cool containers with flooding quantities of water.
Fire potential Extremely flammable. Material will readily ignite at room temperature.
Hazards Material is lighter than water and a fire may be spread by the use of water. Containers may explode in the heat of a fire. Will be easily ignited by heat, sparks or flame.
Combustion products Fire may produce irritating, corrosive and/or toxic gases.
NFPA Health 1
  Flammability 3  
  Reactivity 0  

Health.
Exposure limit(s) TLV: 400 ppm; 1640 mg/m3 STEL 500 ppm (ACGIH 1996). OSHA PEL: TWA 500 ppm (2000 mg/m3) NIOSH REL: TWA 85 ppm (350 mg/m3) C 440 ppm (1800 mg/m3) 15-minute NIOSH IDLH: 750 ppm
Poison_Class 5
Exposure effects Prolonged or repeated skin contact may cause dermatitis. Effects may be delayed.
   Ingestion Aspiration hazard. Causes gastrointestinal irritation with nausea, vomiting and diarrhea. Aspiration of material into the lungs may cause chemical pneumonitis, which may be fatal. Harmful or fatal if swallowed Ingestion of large amounts may cause CNS depression.
   Inhalation Inhalation of high concentrations may cause central nervous system effects characterized by headache, dizziness, unconsciousness and coma. Causes respiratory tract irritation. Vapor harmful. Aspiration may lead to pulmonary edema. Vapors may cause dizziness or suffocation. May cause burning sensation in the chest.
   Skin May cause mild irritation, redness, pain.
   Eyes Causes eye irritation. May cause chemical conjunctivitis and corneal damage.

First aid
 
   Ingestion Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Possible aspiration hazard. Get medical aid immediately.
   Inhalation Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   Skin Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number 1206
Response guide 128
Hazard class 3
Packing Group II  
USCG CHRIS Code HPT  
USCG Compatatibility Group 31 Paraffins
HS Code 2901 10 90  
Std. Transport # 4909190  
IMO Chemical Code 17
IMO Pollution Category C
IMO Hazard code P