Benzene is a hydrocarbon with the molecular formula C6H6, having an Molecular Weight of 78.11 g/mol. It belongs to the group of aromatic hydrocarbons. In the workplace, it is subject to various regulations, including binding occupational exposure limits set by the European Union. The 8-hour limit value is 3.25 mg/m3 (1 ppm), with transitional measures in place until 2026. Safety precautions include wearing safety goggles and gloves, and prohibiting open flames, smoking, and eating and drinking in its vicinity due to its flammability and toxicity to aquatic life.

• CAS Number: 71-43-2
• Molecular Formula: C6H6
• Molecular Weight: 78.11
• Exact Mass: 78.0469501914
• Boiling Point: 176.2 °F at 760 mmHg (NTP, 1992)
• Melting Point: 41.9 °F (NTP, 1992)
• Vapour Density: 2.77 (NTP, 1992) - Heavier than air; will sink (Relative to Air)
• GHS Signal Word: Danger
• Hazard Statements:
• H225: Highly Flammable liquid and vapor [Danger Flammable liquids]
• H401: Toxic to aquatic life [Hazardous to the aquatic environment, acute hazard]