(Liquid + liquid) equilibrium for (dimethyl phthalate+ water), (diethyl phthalate + water), and (dibutyl phthalate + water)

2000 ◽  
Vol 32 (3) ◽  
pp. 393-400 ◽  
Author(s):  
Karel Řehák ◽  
Jaroslav Matouš ◽  
Josef P. Novák ◽  
Magdalena Bendová
Keyword(s):  
Dibutyl Phthalate ◽  
Diethyl Phthalate ◽  
Dimethyl Phthalate ◽  
Liquid Equilibrium

7 Final Report on the Safety Assessment of Dibutyl Phthalate, Dimethyl Phthalate, and Diethyl Phthalate

1985 ◽  
Vol 4 (3) ◽  
pp. 267-303 ◽  
Keyword(s):  
Safety Assessment ◽  
Dibutyl Phthalate ◽  
Mutagenic Activity ◽  
Diethyl Phthalate ◽  
Testicular Atrophy ◽  
Final Report ◽  
Dimethyl Phthalate ◽  
Experimental Animals ◽  
Animal Feeding ◽  
Skin Irritants

Dibutyl Phthalate (DBP), Dimethyl Phthalate (DMP), and Diethyl Phthalate (DEP) are dialkyl phthalates used primarily in cosmetics at concentrations of less than 10 percent as plasticizers, solvents, and perfume fixatives. These phthalates are rapidly absorbed, metabolized, and excreted. Acute animal feeding studies indicate that these ingredients are nontoxic. The results of most subchronic and chronic tests indicate that these ingredients are relatively nontoxic to rats. The oral administration of DBP produced testicular atrophy in various test rodents. The available data are not adequate to prove that these ingredients are teratogenic agents to experimental animals. This was not observed after the administration of DMP and DEP. Undiluted DBP, DMP, and DEP produced only minimal irritation to eyes of rabbits. The mutagenic activity of DBP, DMP, and DEP toward Salmonella typhimurium mutants is essentially negative, but some assays reported positive findings. Carcinogenesis was not observed in DBP feeding studies. Limited clinical data on DBP, DMP, and DEP indicate that these ingredients are not human skin irritants, sensitizers, or phototoxic agents. On the basis of the available data, it is concluded that these compounds are safe for topical application in the present practices of use and concentration in cosmetics.

Thermodynamic properties of dimethyl phthalate + vinyl acetate, diethyl phthalate + vinyl acetate or bromocyclohexane, and dibutyl phthalate + vinyl acetate or 1,2-dichlorobenzene at T = 298.15–308.15 K

2013 ◽  
Vol 67 (11) ◽  
Author(s):  
Abbas Rostamkolahi ◽  
Abbas Rostami ◽  
Fardad Koohyar ◽  
Farhoush Kiani
Keyword(s):  
Thermodynamic Properties ◽  
Vinyl Acetate ◽  
Atmospheric Pressure ◽  
Dibutyl Phthalate ◽  
Excess Molar Volumes ◽  
Polynomial Equation ◽  
Diethyl Phthalate ◽  
Dimethyl Phthalate ◽  
Viscosity Deviations ◽  
Different Temperatures

AbstractThermodynamic properties (densities and viscosities) of binary mixtures of diethyl phthalate (DEP) + bromocyclohexane, dibutyl phthalate (DBP) + 1,2-dichlorobenzene, and vinyl acetate (1) + dimethyl phthalate (DMP) (2), + diethyl phthalate (2), or + dibutyl phthalate (2) were measured over the whole range of mole fractions at atmospheric pressure and different temperatures (T = 298.15 K to 308.15 K). For these mixtures, their excess molar volumes (V E) and viscosity deviations (Δη) were calculated from the experimental data. These results were correlated with the Redlich-Kister polynomial equation to derive the coefficients and standard errors.

scholarly journals Rejection of Organic Micropollutants by Clean and Fouled Nanofiltration Membranes

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Lifang Zhu
Keyword(s):  
Aromatic Hydrocarbons ◽  
Membrane Fouling ◽  
Diethyl Phthalate ◽  
Phthalic Acid Esters ◽  
Organic Micropollutants ◽  
Dimethyl Phthalate ◽  
Nanofiltration Membranes ◽  
Pore Blocking ◽  
Polycyclic Aromatic ◽  
Acid Esters

The rejection of organic micropollutants, including three polycyclic aromatic hydrocarbons (PAHs) and three phthalic acid esters (PAEs), by clean and fouled nanofiltration membranes was investigated in the present study. The rejection of organic micropollutants by clean NF90 membranes varied from 87.9 to more than 99.9%, while that of NF270 membranes ranged from 32.1 to 92.3%. Clear time-dependence was observed for the rejection of hydrophobic micropollutants, which was attributed to the adsorption of micropollutants on the membrane. Fouling with humic acid had a negligible influence on the rejection of organic micropollutants by NF90 membranes, while considerable effects were observed with NF270 membranes, which are significantly looser than NF90 membranes. The observed enhancement in the rejection of organic micropollutants by fouled NF270 membranes was attributed to pore blocking, which was a dominating fouling mechanism for loose NF membranes. Changes in the ionic strength (from 10 to 20 mM) reduced micropollutant rejection by both fouled NF membranes, especially for the rejection of dimethyl phthalate and diethyl phthalate by NF270 membranes (from 65.8 to 25.0% for dimethyl phthalate and 75.6 to 33.3% for diethyl phthalate).

Effects of different plasticizers on highly crosslinked NaAlg/PSSAMA membranes for pervaporative dehydration of tert-butanol

2020 ◽  
Vol 44 (11) ◽  
pp. 4452-4466 ◽  
Author(s):  
Divya D. Achari ◽  
Satishkumar R. Naik ◽  
Mahadevappa Y. Kariduraganavar
Keyword(s):  
Sodium Alginate ◽  
Maleic Acid ◽  
Sulfonic Acid ◽  
Dibutyl Phthalate ◽  
Dioctyl Phthalate ◽  
Diethyl Phthalate ◽  
Tert Butanol ◽  
Polystyrene Sulfonic Acid

Polystyrene sulfonic acid-co-maleic acid (PSSAMA) crosslinked sodium alginate (NaAlg) membranes were developed by incorporating diethyl phthalate (DEP), dibutyl phthalate (DBP) and dioctyl phthalate (DOP).

Preparation of a Novel Magnetic Stir Bar for the Pretreatment of the Plasticizers in Lake Water

2014 ◽  
Vol 989-994 ◽  
pp. 164-167
Author(s):  
Rui Feng
Keyword(s):  
High Performance ◽  
Dibutyl Phthalate ◽  
In Situ Polymerization ◽  
Stir Bar Sorptive Extraction ◽  
Dimethyl Phthalate ◽  
Experimental Conditions ◽  
Sorptive Extraction ◽  
Linear Relationships ◽  
Polymerization Method

An in-situ polymerization method was used for the preparation of a novel stir bar based on neodymium magnet (Nd2Fe14B) powders. The processes were carried out by several steps including the enwrapping of Nd2Fe14B, the modification of the enclosed Nd2Fe14B, and the form of organic polymers on the surface of the modified powders. It was successfully used to enrich the plasticizers in water sample by stir bar sorptive extraction (SBSE). The experimental conditions for SBSE, such as the choice of extraction sorvents, salt concentration, extraction and desorption time were optimized in detail. Coupled to high performance liquid chromatography (HPLC), the recoveries of dibutyl phthalate (DBP), dimethyl phthalate (DMP), diethyl phthalate (DEP) were 89.2%~92.1%, 91.9%~96.6% and 94.3%~96.7%, respectively; the linear relationships between the concentration 5 μg/L and 800 μg/L for DBP were obtained; the limits of detection ranged from 0.09 μg/L to 0.21 μg/L in the optimal conditions.

scholarly journals Surface blocking of azolla modified copper electrode for trace determination of phthalic acid esters as the molecular barricades by differential pulse voltammetry: response surface modelling optimized biosensor

RSC Advances ◽  
2021 ◽  
Vol 11 (52) ◽  
pp. 32630-32646
Author(s):  
Maryam Darvishi ◽  
Shahab Shariati ◽  
Fariba Safa ◽  
Akbar Islamnezhad
Keyword(s):  
Dibutyl Phthalate ◽  
Differential Pulse ◽  
Copper Electrode ◽  
Dimethyl Phthalate ◽  
Surface Modelling ◽  
Response Surface Modelling ◽  
Pulse Voltammetry ◽  
Ethylhexyl Phthalate ◽  
Acid Esters

In this work, a sensitive and efficient voltammetric biosensor was introduced for differential pulse voltammetric (DPV) determination of dibutyl phthalate, dimethyl phthalate, di(2-ethylhexyl)phthalate and dicyclohexyl phthalate in aqueous solutions.

Sign in / Sign up

Export Citation Format

Share Document