Ecological Risk Assessment of Phthalate Esters (DBP and DEHP
According to Table 2, the concentrations of DBP and DEHP in surface water in China range from 0.01 to 133.7 μg/L and from 0.01 to 148.75 μg/L, respectively. The ecological risk of DBP and DEHP in six regions in China was assessed by HQ comparing the exposure concentrations and WQCs derived in this study.
Enhancing the activity and thermal stability of a phthalate
The optimal pH was determined in various buffers at pH 3.0–11.0 (20 mM citrate buffer (pH 3–6), 10 mM Na 2 HPO 4 -NaH 2 PO 4 buffer (pH 6–8), 100 mM Tris-HCl buffer (pH 8–9), 50 mM Glycine-NaOH buffer (pH 9–11)). The pH stability was investigated by pre-incubating in buffers (pH 6.0–10.6) at 40 °C for 1 h.
Phthalates in Cosmetics | FDA
Phthalates are chemical compounds developed in the last century that are used to make plastics more durable. These colorless, odorless, oily liquids also referred to as “plasticizers” based on...
Potential risk of BPA and phthalates in commercial water
BPA, benzyl butyl phthalate (BBP), di-n-butyl phthalate (DBP) and di (2-ethylhexyl) phthalate (DEHP) can cause adverse effects on human health. Papers of literature published in English, with BPA, BBP, DBP and DEHP detections during 2017, by 2025 by liquid chromatography and gas chromatography analysis methods were searched.
Dibutyl phthalate
Dibutyl phthalate ( DBP) is an organic compound which is commonly used as a plasticizer because of its low toxicity and wide liquid range. With the chemical formula C 6 H 4 (CO 2 C 4 H 9) 2, it is a colorless oil, although commercial samples are often yellow. [3] Production and use [ edit]
- Is benzylbutyl phthalate (bzbp) present in drinking water in Vietnam?
- Very high concentrations (μg/L level) of DEHP, benzylbutyl phthalate (BzBP), DEP, and DBP were detected in surface waters from the Red River, Hanoi, Hue, Danang, and Ho Chi Minh City ( Chau et al., 2018 ). Nevertheless, no earlier studies have reported the occurrence of PAEs in drinking water in Vietnam.
- What is the Order of phthalates in Chinese water?
- The ERA of PAEs with the order of in Chinese water are DEHP > DBP > DMP > DEP > D n OP. With increasing urbanization and rapid industrialization, more and more environmental problems have arisen. Phthalates (PAEs) are the foremost and most widespread plasticizers and are readily emitted from these manufactured products into the environment.
- Is there a correlation between DMP and DBP in bottled water?
- In bottled water samples, moderate correlations (Spearman's rho = 0.53–0.76; p < 0.05) were observed for several pairs such as DMP and DEP, DBP, DnOP; DEP and DBP, DiBP, DnOP; DEHP and BzBP; and DBP and DiBP. No significant correlation among PAEs was found in tap water samples.
- Which phthalate is most commonly detected in China surface waters?
- The five PAEs are commonly measured in China surface waters at concentrations between ng/L and μg/L. DBP, DEHP, and di-n-octyl phthalate (D n OP) were the most frequently detected PAEs, with occurrence rates ranging from 67% to 100%.
- What is the NOAEL level of bzbp & DEHP in water?
- The no observed adverse effect level (NOAEL) of BzBP, DEHP, DBP, DEP, and DMP in water were 0.10; 0.32; 20; 600; and 2000 μg/L, respectively (US EPA, 2015 ). The Vietnamese Ministry of Health only regulates DEHP in drinking water with a maximum permissible limit of 1500 μg/L ( Vietnam Ministry of Health, 2011 ).
- What is the concentration of dimethyl phthalate (DMP)?
- The sum concentrations of dimethyl phthalate (DMP), diethyl phthalate (DEP), and dibutyl phthalate (DBP) measured in polyethylene terephthalate (PET) bottles in Beijing ranged from 102 to 710 μg/kg ( Xu et al., 2020 ).
