Melting point :-121--120°C
Boiling point :118 °C(lit.)
Density :0.705 g/mL at 25 °C(lit.)
vapor pressure :0.73 psi ( 37.7 °C)
refractive index :n20/D 1.398(lit.)
Flash point :45 °F
form :clear liquid
color :Colorless to Almost colorless
Odor Threshold :0.027ppm
Water Solubility :792 μg/kg at 25 °C (shake flask-GLC, Price, 1976)
BRN :1730777
Henry's Law Constant :3.70 atm?m³/molat 25 °C (approximate - calculated from water solubility and vapor pressure)
Exposure limits :ACGIH: TWA 300 ppm
LogP :4.627 (est)
CAS DataBase Reference :589-81-1(CAS DataBase Reference)
EPA Substance Registry System :3-Methylheptane (589-81-1)

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.