thymol in alcohol
 This antibacterial activity is caused by inhibiting growth and lactate production, and by decreasing cellular glucose uptake. 58–59. , In 2009, the U.S. Environmental Protection Agency (EPA) reviewed the research literature on the toxicology and environmental impact of thymol and concluded that "thymol has minimal potential toxicity and poses minimal risk"..  Thymol demonstrates in vitro post-antibacterial effect against the test strains E. coli and P. aeruginosa (gram negative), and Staphylococcus aureus and B. cereus (gram positive).  The ancient Greeks used it in their baths and burnt it as incense in their temples, believing it was a source of courage.
It was purified, in 1853, by M. Lallemand, who gave it the name "thymol," and ascribed the formula (old notation) C20H14O2, the same being accepted at the present day as correct, corresponding to C10H14O of the new notation. When the gray predominated, it reminded one of an icteric urine, or even of a nephritic urine mixed with blood; the absence of albumen, however, prevented any mistake as to the latter cause. Mix thoroughly, and divide into 20 pills.
In: Natural Antimicrobials from Plants.  People of the Middle East continue to use za'atar, a delicacy made with large amounts of thyme, to reduce and eliminate internal parasites. Blackie Academic Professional; London, UK: 1995. pp. Thymol (also known as 2-isopropyl-5-methylphenol, IPMP) is a natural monoterpenoid phenol derivative of p-Cymene, C 10 H 14 O, isomeric with carvacrol, found in oil of thyme, and extracted from Thymus vulgaris (common thyme), Ajwain and various other kinds of plants as a white crystalline substance of a pleasant aromatic odor and strong antiseptic properties.
Larger quantities of thymol occur in the oil of horsemint (see Monarda).  Thymol was first synthesized by the Swedish chemist Oskar Widman in 1882. As it is a powerful depressant, it must be carefully used. Description.—Thymol, as described by the U. S. P., forms "large, colorless, translucent crystals of the hexagonal system, having an aromatic, thyme-like odor, and a pungent, aromatic taste, with a very slight caustic effect upon the lips. If 1 Gm. In the majority of cases, half an hour or an hour after the ingestion of thymol, more or less limited and profuse sweats appeared, but in all cases less than those occasioned by salicylic acid or jaborandi. Mix.  In vitro studies have found thymol to be useful as an antifungal against food spoilage and bovine mastitis. Ord.—Labiatae), and Carum Ajowan (Roxburgh), Bentham et Hooker (Nat. Studies have shown that hydrocarbon monoterpenes and thymol in particular degrade rapidly (DT50 16 days in water, 5 days in soil) in the environment and are, thus, low risks because of rapid dissipation and low bound residues, supporting the use of thymol as a pesticide agent that offers a safe alternative to other more persistent chemical pesticides that can be dispersed in runoff and produce subsequent contamination.  In 1853, the French chemist Alexandre Lallemand named thymol and determined its empirical formula.
Dr. B. Kussner has found that from 3 to 5 drops of a 1 per cent solution of thymol is beneficial in diarrhoea of children.  In the European Middle Ages, the herb was placed beneath pillows to aid sleep and ward off nightmares. Thymol blue 0.04% (w/v) in alcohol indicator.
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