P-tert-BUTYLCATECHOL

Styrene is difficult to purify and keep pure. Usually contains added inhibitors (such as a trace of hydroquinone). Washed with aqueous NaOH to remove inhibitors (e.g. rert-butanol), then with water, dried for several hours with MgS04 and distd at 25° under reduced pressure in the presence of an inhibitor (such as 0.005% p-tert-butylcatechol). It can be stored at -78°. It can also be stored and kept anhydrous with Linde type 5A molecular sieves, CaH2, CaS04, BaO or sodium, being fractionally distd, and distd in a vacuum line just before use. Alternatively styrene (and its deuterated derivative) were passed through a neutral alumina column before use [Woon et al. J Am Chem Soc 108 7990 1986 Collman J Am Chem Soc 108 2588 1986]. 

TETRAMETHYLBENZENE p-tert-BUTYLPHENOL p-tert-BUTYLCATECHOL N.N-DIETYHLANILINE 2,6-DIETHYLANILINE CAMPHENE... 

C9H14 propenyl cyclohexene 13511-13-2 gas 0.000 2 20089 C10HMO2 p-tert-butylcatechol 98-29-3 in dioxane 2.830 1... 

C10H1402 p-tert-BUTYLCATECHOL -66.567 1.2468E+00 -1.1749E-03 5.7126E-07 -1.1278E-10 298 1500... 

Most of the monomers that are added are somewhat unstable at room temperature. Consequently, to control shelf Ufe and viscosity, inhibitors are incorporated into the polyester system. The most widely used inhibitors are hydroquinone and p-tert-butylcatechol. 

Simultaneous patch-test reactions to p-tert-hutyl-phenol-formaldehyde resin and p-ferf-butylcatechol have been reported (Estlander et al. 1998), and p-tert-butylcatechol has been shown to be a component in at least some resins based on p-ferf-butylphenol-formal-dehyde (Zimerson and Bruze 1998). This can indicate a connection to other sources of p-ferf-butylcatechol, which is used as an antioxidant (Gellin et al. 1970) and as a stabiliser in different plastic monomers (Macfar-lane et al. 1990). 

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