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petroleum tar

Black viscous (semi-solid) petroleum containing high molecular weight hydrocarbons & sulfur.

Related

coal tar (Tegrin, Estar, Balnetar, Zetar, Pentrax, Sebutone, LCD, Pix Carbonis, Fototar)

General

petroleum

References

  1. Stedman's Medical Dictionary 27th ed, Williams & Wilkins, Baltimore, 1999.