Anthracene

Where It Comes From

Anthracene is a polycyclic aromatic hydrocarbon (PAH) first isolated from coal tar in the 1800s and emerged as an important coal tar product in the 20th century [1]. Large-scale production began with coal tar distillation, and anthracene became a key raw material for production of dyestuffs, pharmaceuticals, and other organic compounds. Its chemical reactivity made it valuable for numerous synthetic applications. Anthracene production and use increased significantly in the 19th-20th centuries. Environmental contamination from coal tar processing, gasworks operations, and coal combustion released anthracene globally. Today, anthracene remains present in coal tar products and as an environmental contaminant near historical coal processing sites [2]. Its presence in fossil fuel combustion products and contaminated sites makes it a widespread environmental pollutant [3].

How You Are Exposed

Workers in coal tar processing and coal distillation face occupational exposure to anthracene dust and vapor. Hazardous waste site workers encounter exposure in contaminated soils. Consumers may experience indirect exposure through anthracene in soil and water near contaminated sites. Environmental exposure through contaminated food and water is low.

Why It Matters

Anthracene is classified as a probable human carcinogen based on animal study evidence. The compound is a photogenotoxin, becoming more toxic when activated by UV light. Animal studies show skin tumors and other malignancies with exposure. Dermal irritation and photosensitivity can occur with occupational exposure. Environmental persistence means historical releases continue posing exposure risks.

Who Is at Risk

Coal tar workers and coal processing facility employees face the highest occupational risk. Hazardous waste remediation workers at contaminated sites encounter exposure. Individuals near coal tar processing or contaminated sites experience chronic environmental exposure. Vulnerable populations include workers and residents with prolonged exposure.

Recovery & Clinical Information

Body Half-Life

Anthracene is absorbed through the skin and gastrointestinal tract with variable bioavailability. Hepatic metabolism produces anthracene metabolites. The elimination half-life is estimated at 1-3 days in mammals. Bioaccumulation potential is low due to moderate lipophilicity and active metabolism.

Testing & Biomarkers

Occupational exposure is detected through air and dust monitoring. Urinary anthracene metabolites indicate systemic absorption. Skin examination documents irritation and photosensitivity. Cancer screening is recommended for occupationally exposed individuals. Environmental soil and water testing identifies contamination.

Interventions

Acute exposure management includes decontamination and removal from source. Dermatitis is managed with emollients and topical corticosteroids. UV light avoidance is critical for photosensitivity management. Cancer surveillance includes regular dermatological examination. Occupational reassignment may be necessary.

Recovery Timeline

Acute irritation symptoms develop within hours to days of significant exposure. Photosensitivity reactions develop within minutes to hours of UV exposure. Occupational skin cancer risk increases over years to decades of chronic exposure. Environmental remediation requires extended timelines.

Recovery References

[1][1] Dipple, A., et al. (1985). 'Polycyclic Aromatic Hydrocarbons and Derivatives.' Handbook of Experimental Pharmacology, 94, 1-32.
[2][2] Nisbet, I. C., & LaGoy, P. K. (1992). 'Toxic Equivalency Factors (TEFs) for Polycyclic Aromatic Hydrocarbons (PAHs).' Regulatory Toxicology and Pharmacology, 16(3), 290-300.
[3][3] ATSDR (2005). 'Toxicological Profile for Polycyclic Aromatic Hydrocarbons.' Agency for Toxic Substances and Disease Registry.