p-Phenylenediamine, the allergen of the year? Why now? Granted, p-phenylenediamine (PPD) has been the leading permanent hair coloring agent or oxidative hair dye in most of the Western world since ...

Background: Finding alternative hair dyes for individuals allergic to para-phenylenediamine (PPD) has been difficult. Newer permanent and demipermanent hair dyes that have replaced PPD with para ...

Most of us have a certain impression of natural-color hair and beard dye: The risk of using these is that they can produce a ...

The method developed in this research is to synthesize carbonized polymer nanodots using ortho-phenylenediamine (oPD) and polyacrylic acid (PAA) hydrothermal synthesis. Researchers mixed some ...

Q: People shouldn't color hair because hair dye is carcinogenic? A: Hair dye contains "p-phenylenediamine", a chemical substance that may pose a certain risk of cancer only with frequent and ...

Q: People shouldn't color hair because hair dye is carcinogenic? A: Hair dye contains "p-phenylenediamine", a chemical substance that may pose a certain risk of cancer only with frequent and ...

The method developed in this research is to synthesize carbonized polymer nanodots using ortho-phenylenediamine (oPD) and polyacrylic acid (PAA) hydrothermal synthesis. Researchers mixed some ...

Ask your stylist about alternatives, such as organic hair dyes and other products that don’t contain ammonia, peroxide, or para-phenylenediamine (PPD). You can find home laser devices on the market.

Recently, the research team led by Jiang Changlong at the Hefei Institutes of Physical Science, which is part of the Chinese Academy of Sciences, developed a novel method for preparing carbonized ...

A research team has devised a novel method to prepare carbonized polymer nanodots capable of emitting multi-color ultra-long room-temperature phosphorescence (RTP) from blue to green. "These ...