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Thymol (also known as 2-isopropyl-5-methylphenol, IPMP), C 10 H 14 O, is a natural monoterpenoid phenol derivative of p-Cymene, isomeric with carvacrol.It occurs naturally in the oil of thyme, and it is extracted from Thymus vulgaris (common thyme), ajwain, [4] and various other plants as a white crystalline substance of a pleasant aromatic odor and strong antiseptic properties.
Thymol blue (thymolsulfonephthalein) is a brownish-green or reddish-brown crystalline powder that is used as a pH indicator. It is insoluble in water but soluble in alcohol and dilute alkali solutions.
Many monoterpenes have unique smell and flavor. For example, sabinene contributes to the spicy taste of black pepper , 3-carene gives cannabis an earthy taste and smell, citral has a lemon-like pleasant odor and contributes to the distinctive smell of citrus fruits, and thujene and carvacrol are responsible for the pungent flavors of summer ...
Fragrance bottles. An aroma compound, also known as an odorant, aroma, fragrance or flavoring, is a chemical compound that has a smell or odor.For an individual chemical or class of chemical compounds to impart a smell or fragrance, it must be sufficiently volatile for transmission via the air to the olfactory system in the upper part of the nose.
In air, terpenoids are converted into various species, such as aldehydes, hydroperoxides, organic nitrates, and epoxides [11] by short-lived free radicals (like the hydroxyl radical) and to a lesser extent by ozone. [12] These new species can dissolve into water droplets and contribute to aerosol and haze formation. [13]
Odour is sensory stimulation of the olfactory membrane of the nose [1] by a group of molecules. [2] Certain body odours are connected to human sexual attraction. [3] [4] Humans can make use of body odour subconsciously to identify whether a potential mate will pass on favourable traits to their offspring.
Thymol can be brominated to bromthymol (CAS number 15062-34-7), which is a recognized anthelmintic drug. 929F, the N,N-diethylaminoethoxy ether of thymol, [1] was an antihistamine that was studied, predating Benadryl. Tymazoline, a vasoconstrictor. Nasal decongestant. A thymol-derived analog of propranolol has the CAS number 5790-40-9.
The AP English Language and Composition exam is typically administered on a Tuesday morning in the second week of May. The exam consists of two sections: a one-hour multiple-choice section, and a two-hour fifteen-minute free-response section. [2] The exam is further divided as follows: