8-Hydroxyquinoline Chemical Properties,Uses,Production
Chemical Properties
Cream-colored crystals
Uses
antiinfectant, complexing agent
Definition
ChEBI: A monohydroxyquinoline that is quinoline substituted by a hydroxy group at position 8. Its fungicidal properties are used for the control of grey mould on vines and tomatoes.
General Description
White to off-white or faintly yellow crystalline powder. Phenolic odor.
Air & Water Reactions
Insoluble in water.
Reactivity Profile
8-Hydroxyquinoline darkens on exposure to light. 8-Hydroxyquinoline readily forms stable metal chelates. 8-Hydroxyquinoline is incompatible with strong oxidizers. 8-Hydroxyquinoline is also incompatible with many metal ions.
Hazard
Toxic by ingestion. Questionable carcinogen.
Fire Hazard
Flash point data for 8-Hydroxyquinoline are not available; however, 8-Hydroxyquinoline is probably combustible.
Safety Profile
Poison by intraperitoneal and subcutaneous routes. Moderately toxic by ingestion. Questionable carcinogen with experimental carcinogenic, neoplastigenic, and tumorigenic data. Experimental reproductive effects. A central nervous system stimulant. Human mutation data reported. Combustible when exposed to heat or flame. When heated to decomposition it emits hghly toxic fumes of NOx.
Purification Methods
Crystallise oxine from hot EtOH, acetone, pet ether (b 60-80o) or water. Crude oxine can be purified by precipitation of copper oxinate, followed by liberation of free oxine with H2S or by steam distillation after acidification with H2SO4. Store it in the dark. It forms complexes with many metals. [Manske et al. Can J Research 27F 359 1949, Phillips Chem Rev 56 271 1956, Beilstein 21 III/IV 1135, 21/3 V 252.]
8-Hydroxyquinoline Preparation Products And Raw materials
