Xylene

Xanthan gum is a polysaccharide used as a food additive and rheology modifier [1]. It is produced by fermentation of glucose or sucrose by the Xanthomonas campestris bacterium.

Xanthone is an organic compound with the molecular formula c₁₃h₈o₂. It can be prepared by the heating of phenyl salicylate. [2] in 1939, xanthone was introduced as an insecticide and it currently finds uses as ovicide for codling moth eggs and as a larvicide. [3] xanthone is also used in the preparation of xanthydrol which used in the determination of urea levels in the blood.

Xylene, xylol or dimethylbenzene, C₆H₄ (CH₃)₂ is the one which is derived from benzene. Según la posición relativa de los grupos metilo en el anillo bencénico, se diferencia entre orto-, meta-, o para- xileno (o con sus nombres sistemáticos 1,2-; 1,3-; y 1,4-dimetilbenceno). According to the relative position of methyl groups in the benzene ring, differs between ortho-, meta-or para-xylene (or their systematic names 1,2 -, 1,3 - and 1,4-dimethylbenzene).

Xylene cyanol can be used as a colour marker to monitor the process of agarose gel electrophoresis and polyacrylamide gel electrophoresis. Bromophenol blue and orange G can also be used for this purpose.