N-heptane is an organic compound with the chemical formula C7H16. It is a colorless, transparent, and volatile liquid that is insoluble in water. It is soluble in ethanol and carbon tetrachloride, and can be mixed with ether, chloroform, acetone, and benzene. It is mainly used as a standard substance and solvent for octane number determination, and can also be used in organic synthesis and the preparation of experimental reagents.
Physical and chemical propertiesDensity: 0.683g/cm3
Melting point: -91 ℃
Boiling point: 98 ℃
Flash point: -4 ℃ (CC)
Refractive index: 1.397 (20 ℃)
Saturated vapor pressure: 6.36kPa (25 ℃)
Critical temperature: 266 ℃
Ignition temperature: 215 ℃
Upper explosive limit (V/V): 6.7%
Lower explosive limit (V/V): 1.05%
Appearance: Colorless transparent liquid
Solubility: insoluble in water, soluble in ethanol, carbon tetrachloride, and miscible with ether, chloroform, acetone, and benzene
Storage method Store in a cool and ventilated warehouse. Stay away from sparks and heat sources. The storage temperature should not exceed 30 ℃. Keep the container sealed. It should be stored separately from oxidants and avoid mixing. Adopting explosion-proof lighting and ventilation facilities. Prohibit the use of mechanical equipment and tools that are prone to generating sparks. The storage area should be equipped with emergency response equipment for leaks and appropriate containment materials.
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