(Encyclopedia) mastic, resin obtained from the small mastic tree Pistacia lentiscus (of the sumac family), found chiefly in Mediterranean countries. When the bark of the tree is injured, the resin…
(Encyclopedia) toluenetoluenetōlˈy&oomacr;ēnˌ [key] or methylbenzenetoluenemĕthˌəlbĕnˈzēn [key], C7H8, colorless liquid aromatic hydrocarbon that melts at −95℃ and boils at 110.8℃. It is…
(Encyclopedia) shellac, solution of lac in alcohol or acetone. In commerce the name is applied to the resinous substance (lac) itself rather than to the solution. It ranges in color from orange to…
(Encyclopedia) colloidcolloidkŏlˈoid [key] [Gr.,=gluelike], a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance…
(Encyclopedia) chloroformchloroformklôrˈəfôrm [key] or trichloromethanechloroformtrīˌklôrōmĕthˈān [key], CHCl3, volatile, colorless, nonflammable liquid that has a sweetish taste and a somewhat…
(Encyclopedia) isopropanol,&sp;isopropyl alcohol, or 2-propanolisopropanol,īˌsəprōˈpənōl, īˌsəprōˈpĭl [key], (CH3)2CHOH, a colorless liquid that is miscible with water. It melts at −89℃ and boils…
(Encyclopedia) anhydrideanhydrideănhīˈdrīd, –drĭd [key] [Gr.,=without water], chemical compound formed by removing water, H2O, from another compound; the anhydride can also react with water to form…
(Encyclopedia) turpentine, yellow to brown semifluid oleoresin exuded from the sapwood of pines, firs, and other conifers. It is made up of two principal components, an essential oil and a type of…
