Category: 1139-46-4

Wu, Yanlin published the artcilePhotodegradation of 4-tert octylphenol in aqueous solution promoted by Fe(III), Related Products of alcohols-buliding-blocks, the publication is Environmental Science and Pollution Research (2013), 20(1), 3-9, database is CAplus and MEDLINE.

4-Tert-octylphenol (4-t-OP), a kind of endocrine-disrupting compounds, is widely distributed in natural water surroundings but can hardly be biodegraded. The advanced oxidation processes (AOPs) have been proved to be an efficient method to degrade 4-t-OP. The photodegradation of 4-t-OP in aqueous solution promoted by Fe(III) and the photooxidation mechanism were studied. The ferric perchlorate was added into the aqueous solution for the production of hydroxyl radical. The efficiency of mineralization was monitored by total organic carbon analyzer, and photooxidation products were determined by HPLC and liquid chromatog.-mass spectrometer. 4-t-OP (2.4 × 10^-5M) in aqueous solution was completely degraded after 45 min in the presence of Fe(III) (1.2 × 10^-3M) under UV irradiation (λ =365 nm). The optimal pH was 3.5. Higher Fe(III) concentration or lower initial 4-t-OP concentration led to increased photodegradation efficiency of 4-t-OP. The reaction was almost completely inhibited in the presence of 2-propanol. About 70% mineralization of the solution was obtained after 50 h. The photooxidation product was supposed to be 4-tert-octyl catechol. 4-t-OP in aqueous solution can be degraded in the presence of Fe(III) under the solar irradiation The photoinduced degradation is due to the reaction with hydroxyl radicals. It shows that the 4-t-OP is mineralized by the inducement of Fe(III) aquacomplexes, which exposes to solar light. Therefore, the results would provide useful information for the potential application of the AOPs to remove 4-t-OP in water surroundings.

Environmental Science and Pollution Research published new progress about 1139-46-4. 1139-46-4 belongs to alcohols-buliding-blocks, auxiliary class Benzene,Phenol, name is 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, and the molecular formula is C25H23NO4, Related Products of alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Nechitailo, N. A. published the artcileDihydric phenols as stabilizers for irradiated polypropylene, COA of Formula: C14H22O2, the publication is Plasticheskie Massy (1966), 37-41, database is CAplus.

Polypropylene (I) of mol. weight 390,000 after addition of 0.1 mmol of stabilizer/g. was irradiated with ⁶⁰Co γ-rays at an intensity of 1.0-1.5 megarads/h. in vacuo with a dose of 160 megarads or in air with a dose of 40 megarads. After irradiation, the fraction insoluble in o-xylene and intrinsic viscosity (in Decalin at 135°) of I were determined As stabilizers hydroquinone (II), 2-methylhydroquinone (III), 2-tert-butylhydroquinone (IV), 2-tert-octylhydroquinone (V), 2,5-di-tert-butylhydroquinone (VI), pyrocatechol (VII), 4-methylpyrocatechol (VIII), 4-tert-butylpyrocatechol (IX), 4-tert-octylcatechol (X), and 3,5-di-tert-butylpyrocatechol (XI) were used. The oxidation of I with air was determined by DTA and ir anal. γ-rays caused fission of chains and a decrease in mol. weight and softening temperature; simultaneously, crosslinking took place and an insoluble gel was formed. In the absence of air, no oxidation took place and only IX, X, and XI decreased the destruction of I; the amount of gel formed in I without stabilizers was 77.5%, and with II 68.0%, III 54.8%, IV 50.3%, V 43.7%, VI 67.0%, VII 40%, VIII 15.0%, IX 14.2%, X 71.0%, and XI 8.7%. Dihydric phenols shifted the temperature of the oxidation initiation to higher temperatures; the effect of alkyl derivatives of VII containing tert-Bu groups was especially strong. Oxidation of I irradiated in the presence of air was weakened by the addition of several phenols (no formation of a gel fraction, strong diminution of absorption by OH groups in the ir spectrum). The intrinsic viscosity of I irradiated in the presence of air was 0.13 for pure I (before irradiation 3.2), for II 0.11, III 0.23, IV 0.13, V 0.22, VI 0.13, VII 0.31, VIII 0.31, IX 0.20, X 0.11, and XI 0.17.

Plasticheskie Massy published new progress about 1139-46-4. 1139-46-4 belongs to alcohols-buliding-blocks, auxiliary class Benzene,Phenol, name is 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, and the molecular formula is C14H22O2, COA of Formula: C14H22O2.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Coupek, Jiri published the artcileGel chromatographic behavior of mononuclear aromatic hydrocarbons and phenols, Formula: C14H22O2, the publication is Journal of Chromatography (1974), 95(1), 103-12, database is CAplus.

The gel chromatog. behavior of aromatic hydrocarbons and phenols during elution with THF in columns packed with styrene-divinylbenzene copolymer was investigated. From the elution volumes of 27 aromatic hydrocarbons and 80 phenols, conclusions were drawn about the effects of the types and positions of substituents and of the numbers and positions of phenolic hydroxyl groups on the elution volumes of these compounds in the system under investigation. The effects of the size of the alkyl substituents and of their positions with respect to the hydroxyl group of phenols were determined, and the partial contributions of the alkyl and hydroxyl groups to the elution volumes were calculated Chromatog. results were used for the characterization of the solvatability of phenolic mols. with THF and as the basis of a discussion of problems of the steric hindrance of hydroxyl groups due to neighboring substituents.

Journal of Chromatography published new progress about 1139-46-4. 1139-46-4 belongs to alcohols-buliding-blocks, auxiliary class Benzene,Phenol, name is 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, and the molecular formula is C14H22O2, Formula: C14H22O2.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Pospisil, J. published the artcileAntioxidants and stabilizers. XIII. Activity of phenolic antioxidants with large tertiary alkyl groups in lard and isopropyl oleate, Safety of 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, the publication is Fette, Seifen, Anstrichmittel (1968), 70(6), 442-5, database is CAplus.

The activity of 5 types of phenolic antioxidants containing 1 or 2 OH groups and substituted by 1 or more large tert-alkyl groups with 4, 8, or 12 C atoms was tested with lard and iso-Pr oleate as substrates. The effectiveness of the antioxidants was dependent on several factors which affect their reaction with the ROO- radicals formed by the autoxidation of the fat. The antioxidants tested had a different effect on the 2 substrates. The best effect was with a 2,4,6-trisubstituted phenol and a 4-tert-alkylpyrocatechol acting on lard. 17 references.

Fette, Seifen, Anstrichmittel published new progress about 1139-46-4. 1139-46-4 belongs to alcohols-buliding-blocks, auxiliary class Benzene,Phenol, name is 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, and the molecular formula is C14H22O2, Safety of 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Ryba, O. published the artcileAntioxidants and stabilizers. VII. Influence of structure on polarographic half-wave potentials of alkylated pyrocatechols, Related Products of alcohols-buliding-blocks, the publication is Collection of Czechoslovak Chemical Communications (1965), 30(7), 2157-63, database is CAplus.

cf. CA 63, 10648b. The influence of substituents in various positions in pyrocatechol on E_1/2 values was discussed in terms of polar, mesomeric, and steric effects of these groups. The pyrocatechol derivatives yielded best developed polarographic waves in acetate buffers, the dependence of E_1/2 on pH being the same for all substances studied: E_1/2 = E₀ – 0.059 pH at 25°. The E₀ values were determined with an accuracy of ±2 mv. and tabulated. The logarithmic analysis of the waves indicates a reversible 2-electron oxidation 20 references.

Collection of Czechoslovak Chemical Communications published new progress about 1139-46-4. 1139-46-4 belongs to alcohols-buliding-blocks, auxiliary class Benzene,Phenol, name is 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, and the molecular formula is C14H22O2, Related Products of alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Gasparic, Jiri published the artcileIdentification of organic compounds. XL. Chromatographic methods for analyzing mixtures of alkyl phenols, SDS of cas: 1139-46-4, the publication is Journal of Chromatography (1961), 408-17, database is CAplus.

cf. CA 55, 12157e. Mixtures of alkyl phenols (I) were obtained by alkylation of the phenols with isobutylene or diisobutylene. Monohydric I were separated and identified by paper chromatog. in solvent systems including HCONMe₂/C₆H₁₄ or paraffin oil/MeOH/H₂O. HCONH₂-impregnated paper and the solvent system C₆H₆/CHCl₃ are recommended for separating alkyl derivatives of pyrocatechols. For anal. purposes, the pyrocatechol derivatives can also be separated on polyamide powder columns with aqueous alc. as eluent. I and alkylcresols are also separated and identified by gas chromatog. on a nonpolar (silicone oil) and a polar (Polydiol 400 3,5-dinitrobenzoate) liquid phase. R_f values in 6 solvent systems and colors with o-chloro-p-nitroaniline (before and after spraying with O.1N NaOH) and diazotized sulfanilic acid are tabulated for PhOH and 25 I. R_f values are also tabulated for pyrocatechol and 4 alkylated derivatives in 3 solvent systems. Retention volumes are given for PhOH and 15 I.

Journal of Chromatography published new progress about 1139-46-4. 1139-46-4 belongs to alcohols-buliding-blocks, auxiliary class Benzene,Phenol, name is 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, and the molecular formula is C14H22O2, SDS of cas: 1139-46-4.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Bleehen, S. S. published the artcileDepigmentation of skin with 4-sisopropylcatechol, mercaptoamines, and other compounds, Computed Properties of 1139-46-4, the publication is Journal of Investigative Dermatology (1968), 50(2), 103-17, database is CAplus and MEDLINE.

Thirty-three compounds including thiols, mercaptoamines, catechol, catechol derivatives, and quinones were tested for their depigmenting potency and irritant effect on the skin of guinea pigs. These compounds, in concentrations ranging from 1 to 10%, were applied topically to the epilated skin of the back and the unepilated skin of the ear of black guinea pigs; 4-isopropylcatechol (4-IPC) was the most potent depigmenting agent, and the depigmentation occurred only in the treated areas. When used in low concentrations (1-3%), 4-IPC did not irritate the skin. Evidence obtained by light and electron microscopy indicated that 4-IPC markedly reduced the population of the melanocytes in the epidermis. The few remaining melanocytes were rendered degenerative, and those found had only a few melanized melanosomes. Cutaneous depigmentation by 4-IPC apparently results from a selective action on melanocytes; they are either destroyed or inactivated.

Journal of Investigative Dermatology published new progress about 1139-46-4. 1139-46-4 belongs to alcohols-buliding-blocks, auxiliary class Benzene,Phenol, name is 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, and the molecular formula is C14H22O2, Computed Properties of 1139-46-4.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Campbell, Curt B. published the artcileAmberlyst-15-catalyzed alkylation of phenolics with branched alkenes. Rearrangement of tert-alkylphenols and catechols to sec-alkyl isomers, HPLC of Formula: 1139-46-4, the publication is Industrial & Engineering Chemistry Research (1990), 29(4), 642-7, database is CAplus.

Alkylation of PhOH or catechol with olefins capable of forming tert-alkylcarbonium ions, catalyzed by Amberlyst 15, gave the corresponding tert-alkylphenols at 25-130°, with higher temperatures favoring the para isomer. Alkylations at 140-150° unexpectedly gave sec-alkylphenols, with both ortho and para isomers being formed in almost equal amounts The driving force of the reaction appeared to be the low stability of the tert-alkylphenols, leading to reversibility of the alkylation reaction. The rearrangement of tert-alkylphenols to sec-alkylphenols was favored when the tert-alkyl substituent was C_>4.

Industrial & Engineering Chemistry Research published new progress about 1139-46-4. 1139-46-4 belongs to alcohols-buliding-blocks, auxiliary class Benzene,Phenol, name is 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, and the molecular formula is C14H22O2, HPLC of Formula: 1139-46-4.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Nunez-Delicado, Estrella published the artcileHydroperoxidase Activity of Lipoxygenase in the Presence of Cyclodextrins, Application of 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, the publication is Archives of Biochemistry and Biophysics (1999), 367(2), 274-280, database is CAplus and MEDLINE.

The oxidation of xenobiotics by the hydroperoxidase activity of lipoxygenase in the presence of cyclodextrins was studied. These produced an inhibitory effect on xenobiotics oxidation, based on their degree of hydrophobicity and the charge (isoproterenol < 4-methyl-catechol (4MC) < 4-tert-butylcatechol (TBC) < 4-tert-octylcatechol (TOC)). This inhibitory effect was due to the complexation of xenobiotics in the hydrophobic cavity of cyclodextrins. The complexation constant K_c was calculated by nonlinear regression of the inhibition curves obtained in the presence of cyclodextrins, and the values obtained were 400, 16,250, and 35,127 M^-1 for 4MC, TBC, and TOC, resp. The validity of these values was checked at different points of the Michaelis-Menten saturation curve, and a sigmoidal inhibition curve was obtained at the saturating concentration of the o-diphenol, TBC, with no change in the K_c value. This demonstrates the validity of the equations used to calculate K_c for the complete range of the Michaelis-Menten equation. (c) 1999 Academic Press.

Archives of Biochemistry and Biophysics published new progress about 1139-46-4. 1139-46-4 belongs to alcohols-buliding-blocks, auxiliary class Benzene,Phenol, name is 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, and the molecular formula is C14H22O2, Application of 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Brand, N. published the artcilePrimary mechanism in the degradation of 4-octylphenol photoinduced by Fe(III) in water-acetonitrile solution, Name: 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, the publication is Journal of Photochemistry and Photobiology, A: Chemistry (2000), 135(2-3), 221-228, database is CAplus.

The degradation of 4-octylphenol (4-OP), a toxic and persistent product in the environment, photoinduced by Fe(III) was studied in water/acetonitrile solution (95/5 by volume). The initial rate of 4-OP degradation depends on the irradiation wavelength and on the initial concentration of Fe(OH)²⁺, the monomeric species present in our exptl. conditions. Several photoproducts were identified among them 4-(1,1,3,3-tetramethylbutyl)pyrocatechol. The formation of octylphenoxyl radical was observed by fast kinetics as a result of the quenching reaction between Fe(III) species in the excited state and 4-OP. For longer irradiation times, regeneration of the monomeric species, Fe(OH)²⁺, is suggested due to Fe(II) reoxidation by radicals.

Journal of Photochemistry and Photobiology, A: Chemistry published new progress about 1139-46-4. 1139-46-4 belongs to alcohols-buliding-blocks, auxiliary class Benzene,Phenol, name is 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol, and the molecular formula is C14H22O2, Name: 4-(2,4,4-Trimethylpentan-2-yl)benzene-1,2-diol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts