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Octadecane

Density: 0.8±0.1 g/cm3 Boiling point: 316.3±5.0 °C at 760 mmHg Melting point: 28 °C Molecular formula: C18H38 Molecular weight: 254.494 Flash point: 165.6±0.0 °C Exact mass: 254.297348 ...

Release time：2025-04-26

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Physical and chemical properties of n-octadecane

Density: 0.8±0.1 g/cm3

Boiling point: 316.3±5.0 °C at 760 mmHg

Melting point: 28 °C

Molecular formula: C18H38

Molecular weight: 254.494

Flash point: 165.6±0.0 °C

Exact mass: 254.297348

LogP: 10.32

Appearance: transparent semi-liquid

Vapor density: 8.8 (vs air)

Vapor pressure: 0.0±0.3 mmHg at 25°C

Refractive index: 1.438

Storage conditions: sealed in a cool and dry place.

Stability

1. Materials to avoid: oxidants

2. Dangerous decomposition products: carbon monoxide, carbon dioxide

3. Exists in flue-cured tobacco leaves and flue gas.

Emergency treatment: Quickly evacuate personnel from the leaking contaminated area to a safe area, isolate it, and strictly restrict entry and exit. Cut off the source of fire. It is recommended that emergency response personnel wear self-contained positive pressure respirators and anti-toxic clothing. Cut off the source of leakage as much as possible. Prevent it from flowing into restricted spaces such as sewers and flood drainage ditches. Small leakage: adsorb or absorb with sand or other non-combustible materials. It can also be scrubbed with an emulsion made of non-combustible dispersants, and the washing liquid can be diluted and put into the wastewater system. Large leakage: build a dike or dig a pit to contain it. Transfer it to a tank truck or a special collector with a pump, and recycle it or transport it to a waste treatment site for disposal.

Operation precautions:

Closed operation, provide good natural ventilation conditions. Operators must undergo special training and strictly abide by the operating procedures. It is recommended that operators wear self-priming filter gas masks (half masks), chemical safety glasses, anti-toxic penetration work clothes, and rubber oil-resistant gloves. Stay away from fire and heat sources, and smoking is strictly prohibited in the workplace. Use explosion-proof ventilation systems and equipment. Prevent vapor from leaking into the air in the workplace. Avoid contact with oxidants. Load and unload gently during transportation to prevent damage to packaging and containers. Equipped with appropriate types and quantities of fire-fighting equipment and emergency leak handling equipment. Empty containers may contain harmful substances.

Storage precautions:

Store in a cool, ventilated warehouse. Keep away from fire and heat sources. Store separately from oxidants and avoid mixing. Equipped with appropriate types and quantities of fire-fighting equipment. The storage area should be equipped with emergency leak handling equipment and appropriate containment materials.

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