Background: Temporary black henna tattoos are very popular as body adornment. Although contact allergy to natural henna is unusual, the inclusion of hair dye, p-phenylenediamine (PPD), increases the risk of contact sensitization.
Objective: This study was performed to identify the presence and concentration of PPD in a black henna tattoo mixture to which our patient developed contact allergy.
Methods: The presence of PPD in a black henna tattoo mixture, various samples of commercially available henna powders, and several hair dye products was qualitatively and quantitatively detected using high performance liquid chromatography (HPLC).
Results: This study demonstrated that PPD was present in the black henna tattoo mixture at a concentration of 15.7%, which is significantly higher than commercial hair dye preparations.
Conclusion: The presence of PPD in black henna tattoo mixtures in high concentration poses a health hazard and a risk of allergic contact sensitization with potential long-term consequences.
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http://dx.doi.org/10.1053/ajcd.2002.30466 | DOI Listing |
Environ Sci Technol
December 2024
Laboratory for Chemical Environmental Risk Assessment, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China.
N-(1,3-Dimethylbutyl)-'-phenyl-1,4-phenylenediamine (6PPD) and its oxidation product 6PPD-quinone (6PPDQ) showed different acute toxicities and bioaccumulation potencies in fish. In this study, we compared the thyroid disrupting effects of 6PPD and 6PPDQ through , , and assays. Interestingly, although 6PPD and 6PPDQ showed similar docking affinities with thyroid hormone receptor (TR) isoforms and GH3 cell inhibition effects, the thyroid signaling pathway, eye development, phototactic behaviors, and cell density in the retinal layer in the larval zebrafish were significantly affected only following 6PPD exposure.
View Article and Find Full Text PDFMacromol Rapid Commun
November 2024
College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Electrochromic supercapacitors, which indicate energy states through optical color changes, are gaining significant attention for their potential in energy saving and recycling. In this study, a novel metal-organic coordination polymer (DTPB-MCP) is successfully synthesized using an N,N'-diphenyl-1,4-phenylenediamine (DTPB)-functionalized phenanthroline ligand. The resulting DTPB-MCP film demonstrated desirable electrochromic performance in both the visible light (ΔT:77.
View Article and Find Full Text PDFSci Total Environ
December 2024
MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China. Electronic address:
P-phenylenediamine antioxidants (PPDs) are widely used in the rubber industry and their release and transformation in the environment has become one of the current environmental research hotspots. PPDs are readily oxidized in the environment to form quinone transformation products (PPD-Qs), some of which (e.g.
View Article and Find Full Text PDFSci Rep
November 2024
Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Ainy St., Cairo, ET-11562, Egypt.
Molecularly Imprinted Polymers (MIPs) are synthetic materials designed to selectively recognize and bind to specific target molecules. The process of determining Bupropion (BUP) using MIPs involves preparing the MIP, extracting the target molecule, and conducting subsequent analysis. A bio-inspired MIP-based electrochemical sensor was developed to detect BUP, utilizing the specific binding of MIPs to Bupropion molecules, enabling precise and sensitive detection.
View Article and Find Full Text PDFEnviron Sci Technol
December 2024
Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada.
The tire-rubber-derived ozonation product of -(1,3-dimethylbutyl)-'-phenyl--phenylenediamine (6PPD), -(1,3-dimethylbutyl)-'-phenyl--phenylenediamine-quinone (6PPD-Q), was recently discovered to cause acute mortality in coho salmon (). -Phenylenediamines (PPDs) with variable side chains distinct from 6PPD have been identified as potential replacement antioxidants, but their toxicities remain unclear under environmentally relevant ozone conditions. We herein tested the multiphase gas-surface ozone reactivity of four select PPDs [6PPD, -isopropyl-'-phenyl--phenylenediamine (IPPD), ,'-diphenyl--phenylenediamine (DPPD), and -phenyl-'-cyclohexyl--phenylenediamine (CPPD)] and evaluated the toxicity of their reaction mixtures in coho salmon, rainbow trout (), and fathead minnow ().
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