Description of what it is like

Phenol, also known as carbolic acid, is an aromatic organic compound. In its pure form, it is a white crystalline solid that is volatile. It has a characteristic sweet, medicinal odor. It is moderately soluble in water and highly soluble in organic solvents.

Origin and where to find it

• Natural: Found in coal tar and formed during the decomposition of organic matter.
• Scavenging: Can be found in old medical supplies as an antiseptic or in chemical plants.

Minimum processing required

• Extraction from Coal Tar: Fractional distillation of coal tar yields a “middle oil” fraction from which phenol can be extracted by treatment with sodium hydroxide followed by neutralization with acid.
• Synthesis: Can be synthesized from Benzene (if available) via several industrial processes like the cumene process or sulfonation.

Tools needed to work on it

• Distillation Apparatus: For extracting and purifying from coal tar.
• Glassware: Resistant to corrosive acids and organic solvents.
• Safety Equipment: Gloves, goggles, and ventilation (highly corrosive and toxic).

Common forms of use

• Antiseptic: Used by Joseph Lister to pioneer antiseptic surgery.
• Precursor: Essential for making Bakelite, Aspirin, and many herbicides.

Possible substitutes

• Antiseptic: Alcohol, Iodine, or Soap for general cleaning.
• Industrial: Other phenols (like cresols) for some resin applications.

Limitations and common failures

• Hygroscopic: Absorbs water from the air, which can change its concentration and effectiveness.
• Light Sensitive: Darkens when exposed to light and air due to oxidation.

Risks and safety

• Toxicity: Highly toxic if swallowed, inhaled, or absorbed through the skin.
• Corrosivity: Causes severe skin burns and eye damage.
• Systemic Effects: Can cause damage to the liver, kidneys, and central nervous system upon absorption.
• Environment: Toxic to aquatic life.