Melting point :−91 °C(lit.)
Boiling point :98 °C(lit.)
Density :0.684 g/mL at 20 °C
vapor density :3.5 (vs air)
vapor pressure :40 mm Hg ( 20 °C)
refractive index :n20/D 1.397
Flash point :30 °F
storage temp. :Store at +5°C to +30°C.
solubility :acetone: miscible(lit.)
form :Liquid
pka :>14 (Schwarzenbach et al., 1993)
Specific Gravity :0.684 (20/4℃)
color :≤10(APHA)
Odor :Gasoline.
Relative polarity :0.012
explosive limit :1-7%(V)
Odor Threshold :0.67ppm
Water Solubility :practically insoluble
λmax :λ: 200 nm Amax: ≤1.0
λ: 225 nm Amax: ≤0.10
λ: 250 nm Amax: ≤0.01
λ: 300-400 nm Amax: ≤0.005 Merck :14,4659
BRN :1730763
Henry's Law Constant :0.901, 1.195, and 1.905(atm?m³/mol) at 26.0, 35.8, and 45.0 °C, respectively (dynamic headspace, Hansen et al., 1995)
Exposure limits :NIOSH REL: TWA 85 ppm (350 mg/m³), 15-min ceiling 440 ppm (1,800 mg/m³), IDLH 750 ppm; OSHA PEL: TWA 500 ppm (2,000 mg/m³); ACGIH TLV: TWA 400 ppm, STEL 500 ppm (adopted).
Dielectric constant :1.9（20℃）
Stability :Stable. Incompatible with oxidizing agents, chlorine, phosphorus. Highly flammable. Readily forms explosive mixtures with air.
InChIKey :IMNFDUFMRHMDMM-UHFFFAOYSA-N
LogP :4.660
Surface tension :21.12mN/m at 293.15K
CAS DataBase Reference :142-82-5(CAS DataBase Reference)
NIST Chemistry Reference :Heptane(142-82-5)
EPA Substance Registry System :Heptane (142-82-5)
Absorption :0.10 at 225nm
0.40 at 210nm
1.0 at 197nm

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501 H304 May be fatal if swallowed and enters airways Aspiration hazard Category 1 Danger H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H336 May cause drowsiness or dizziness Specific target organ toxicity,single exposure; Narcotic effects Category 3 Warning P261, P271, P304+P340, P312,P403+P233, P405, P501 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233 Keep container tightly closed. P273 Avoid release to the environment. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P331 Do NOT induce vomiting.