Search results
Results From The WOW.Com Content Network
Xylene is used in the laboratory to make baths with dry ice to cool reaction vessels, [17] and as a solvent to remove synthetic immersion oil from the microscope objective in light microscopy. [18] In histology, xylene is the most widely used clearing agent. [19] Xylene is used to remove paraffin from dried microscope slides prior to staining.
o-Xylene (ortho-xylene) is an aromatic hydrocarbon with the formula C 6 H 4 (CH 3) 2, with two methyl substituents bonded to adjacent carbon atoms of a benzene ring (the ortho configuration). It is a constitutional isomer of m -xylene and p -xylene , the mixture being called xylene or xylenes.
m-Xylene (meta-xylene) is an aromatic hydrocarbon. It is one of the three isomers of dimethylbenzene known collectively as xylenes . The m- stands for meta- , indicating that the two methyl groups in m -xylene occupy positions 1 and 3 on a benzene ring.
p-Xylene (para-xylene) is an aromatic hydrocarbon. It is one of the three isomers of dimethylbenzene known collectively as xylenes . The p- stands for para- , indicating that the two methyl groups in p -xylene occupy the diametrically opposite substituent positions 1 and 4.
for p-Xylene/carbon tetrachloride [6] P = 760 mm Hg BP Temp. °C % by mole carbon tetrachloride liquid vapor 136.4: 1.7: 5.9 131.1: 6.3: 21.6 126.2: 11.1: 34.9 121.8 ...
for o-Xylene/Carbon tetrachloride [8] P = 760 mm Hg BP Temp. °C % by mole carbon tetrachloride liquid vapor 142.0: 1.8: 6.5 136.0: 6.4: 22.9 130.4: 11.2: 36.9 125.0 ...
For example, reaction of α,α'-dibromo-o-xylene with iron carbonyls affords low yields of the xylylene complex Fe(CO) 3 [η 4-C 6 H 4 (CH 2) 2]. This product is structurally analogous to Fe(CO) 3 [η 4-1,3-butadiene]. [11] At high temperatures, benzocyclobutenes undergo electrocyclic ring-opening to form o-xylylenes.
The estimated 2008 usage of musk xylene in the European Union was 25 tonnes. [9] Musk xylene permitted until 2011 for use in cosmetics products (except oral care products) in the European Union under the Cosmetics Directive. The permitted quantities are: up to 1% in fine fragrances; up to 0.4% in eau de toilette; up to 0.03% in other products. [10]