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Refrigerating machines, containing nonflammable, nontoxic, liquefied gas or ammonia solution (UN2672) UN 2858: 4.1: Zirconium, dry, coiled wire, finished metal sheets, strip (thinner than 254 micrometres but not thinner than 18 micrometres) UN 2859: 6.1: Ammonium metavanadate: UN 2860: 6.1
Phenol is also a versatile precursor to a large collection of drugs, most notably aspirin but also many herbicides and pharmaceutical drugs. Phenol is a component in liquid–liquid phenol–chloroform extraction technique used in molecular biology for obtaining nucleic acids from tissues or cell culture samples.
Download as PDF; Printable version; ... Safety data sheet ... (2,5-DCP) is a chlorinated derivative of phenol with the molecular formula Cl 2 C 6 H 3 OH. References
Phenol red exists as a red crystal that is stable in air. Its solubility is 0.77 grams per liter (g/L) in water and 2.9 g/L in ethanol. [1] It is a weak acid with pK a = 8.00 at 20 °C (68 °F). A solution of phenol red is used as a pH indicator, often in cell culture.
In 1834, German chemist Friedlieb Ferdinand Runge discovered a phenol, also known as carbolic acid, which he derived in an impure form from coal tar.In August 1865, Joseph Lister applied a piece of lint dipped in carbolic acid solution to the wound of an eleven-year-old boy at Glasgow Royal Infirmary, who had sustained a compound fracture after a cart wheel had passed over his leg.
Sodium phenoxide is a moderately strong base. Acidification gives phenol: [5] PhOH ⇌ PhO − + H + (K = 10 −10) The acid-base behavior is complicated by homoassociation, reflecting the association of phenol and phenoxide. [6] Sodium phenoxide reacts with alkylating agents to afford alkyl phenyl ethers: [2]
The cyclohexadienones, also referred to in the literature as Chinolether, cleave the 4-position tert-butyl group upon heating under acidic conditions and aromatizes back to the substituted phenol. The reaction can be used for the synthesis of 2,6-di- tert -butyl-4-methoxyphenol, which is frequently used as an antioxidant.
2,6-DMP is produced by the methylation of phenol. With production >100,000 tons/y, it is the most important xylenol. The methylation is carried out by contacting gaseous phenol and methanol at elevated temperatures in the presence of a solid acid catalyst: [2] [3] C 6 H 5 OH + 2 CH 3 OH → (CH 3) 2 C 6 H 3 OH + 2 H 2 O