P-butyl hydroxybenzoate

Fig. 4 Van t Hoff plots (left) and Hildebrand plots (right) representing the influence of temperature (absolute) on the aqueous mole fraction solubility of adipic acid (AD), acetaminophen (AM), methylp-hydroxybenzoate (MP), ethylp-hydroxybenzoate (EP), propyl p-hydroxybenzoate (PP), and butyl p-hydroxybenzoate (BP). The data represented by O were taken from Ref. 24, while the data represented by x were obtained from Ref. 23. (Reproduced with permission of the copyright owner, Elsevier Science Publishing Co.)...

Synonyms 4-Hydtoxybenzoic acid, propyl Butyl p-hydroxybenzoate 4- Thiaben 2-(thiazol-4-yl) (l,l -Biphenyl)-2-ol 2-hydroxy-... 

Thiourea, methyl p-hydroxy-benzoate, ethyl p-hydroxybenzoate, n-propyl p-hydroxybenzoate, n-butyl p-hydroxybenzoate, propranolol, biphenyl, dibucaine... 

Propylene glycol Butyl p-hydroxybenzoate 11 Rubino and Obeng (1991) 19.6... 

Internal standard sec-butyl p-hydroxybenzoate (14.3) Limit of detection 1-2 pg/mL... 

Fluorenol (89) is reduced photochemically by triethylamine to give fluorene in high yield a small amount of 9-ethylidenefluorene is also formed. Other amines are effective, although the yields are generally lower, and 9-acetoxyfluorene also reacts to give fluorene in rather low yield. The photoreduction reaction is related formally to the photoreduction of dicyanopyrazine (84). An apparently straightforward replacement of hydrogen by nitro in the photolysis of butyl p-hydroxybenzoate (90) in aqueous sodium nitrite is shown to be more complex, and it seems possible that the initial attack is by HO radicals, followed by reaction with NO2. 

Aceto. See 3,5-Di-t-butyl-p-hydroxybenzoic acid o-Acetoacetanisidide, 2-((4-chloro-2-nitrophenyl) azo)-. See Pigment yellow 73 Acetoacetic acid, butyl ester. See Butyl acetoacetate... 

Butyl p-hydroxybenzoate. See Butylparaben n-Butyl-4-hydroxybenzoate potassium salt. See Potassium butyl paraben Butyl (2-hydroxyethyl) amine. See N-Butylethanolamine... 

Synonyms Butyl 4-hydroxybenzoate n-Butyl 4-hydroxybenzoate n-Butyl p-hydroxybenzoate Butyl p-hydroxybenzoate Butyl parasept 4-Hydroxybenzoic acid butyl ester p-Hydroxybenzoic acid butyl ester Parasept Definition Ester of butyl alcohol and p-hydroxybenzoic acid Empirical C11H14O3... 

Di-t-butyl-4-hydroxybenzoic acid. See 3,5-Di-t-butyl-p-hydroxybenzoic acid... 

Sodium butyl 4-hydroxybenzoate Sodium n-butyl-4-hydroxybenzoate Sodium butyl-p-hydroxybenzoate. See Sodium butylparaben Sodium butylparaben... 

Di-t-butyl-p-hydroxybenzoic acid 1,5-Dioxaspiro [5.5] undecane 3,3-dicarboxylic acid, bis (2,2,6,6-tetramethyl-4-piperidinyl) ester 4-Dodecyloxy-2-hydroxybenzophenone 2-(2 -Hydroxy-3,5 -di-t-amylphenyl) benzotriazole Phenyl salicylate UV absorber, PET... 

A gas chromatographic method may be employed for analysis for both benzoic acid and sorbic acid in food, as described in AOAC method 983.16. The acids are extracted from an acidified aqueous homogenized food sample into ether. The acids are then extracted from the ether solution into aqueous alkali, and after acidification they are re-extracted into dichloromethane. Treatment of the residue with N-methyl-N-trimethylsilyltrifluoroacetamide converts the benzoic and sorbic acids into trimethylsilyl esters. These esters are then analyzed with a glass column packed with a support coated with OV-1, in a temperature programmed analysis. Phenylacetic and caproic acids are used as internal standards for benzoic and sorbic acids, respectively. An LC method has also been described for analysis of benzoic acid with simultaneous determination of sorbic acid, and methyl, ethyl, propyl, and butyl p-hydroxybenzoates. The preservatives were extracted from meat or seasonings with 70% ethanol, and analyzed by reversed-phase LC using a Cig stationary phase with a linear gradient from 10 to 70% methanol in 1.5% aqueous ammonium acetate and 1.5% aqueous acetic acid. 

Synonyms butyl p-hydroxybenzoate -butyl-paraben n-butyl-p-hydroxybenzoate butyl-4-hydroxybenzoate Butoben Butyl Cnemosept Butyl Parasept 4-hydroxybenzoic acid butyl ester Tegosept B p-hydroxybenzoic acid w-butyl ester 4-(butoxycarbo-nyl)phenol aseptoform butyl Butyl Tegosept Nipabutyl Solbrol B Preserval B SPF Tegosept Butyl Butyl Butex p-hydroxybutyl benzoate hydroxybenzoic acid butyl ester... 

Attempts have regularly been described that are developed on standards. For instance, Yamamoto et al [49] used a test material based on ethyl-p-aminobenzoate and n-butyl-p-hydroxybenzoate. The authors derived the solubility curve and showed that the phenomenon in which p-aminobenzoate dissolved in the melted eutectic mixture was close to ideal solutions based on Raoult s law. The heat of mixing, at infinite dilution was given a value of -1.9 J g . Therefore, the heat of dissolution and heat of fusion coincided within the allowable error. 

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