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 ...

The company has been making paraphenylenediamine-free claims on a range of products containing the PPD-related chemical ...

The chemical in hair dye that is most likely to cause an allergy is called para-phenylenediamine (PPD). PPD is found in more than two-thirds of permanent hair dyes and can penetrate the hair shaft ...

The Minnesota Department of Health issued a news release Thursday warning against use of henna products that contain additives to create “temporary tattoos.” Materials that are sometimes added to ...

The most common allergic reactions to hair dye chemicals are dermatitis of the ... Cross-sensitization means that it not only makes you sensitive to PPD but you become responsive to all of its ...

Yes, chemicals in hair dyes, such as ammonia, peroxide, and para-phenylenediamine (PPD), can enter the body through the scalp. Prolonged exposure or improper use of these dyes may contribute to ...

The vast majority of reactions to hair-dye products are caused by PPD. [4–6] In past years, PPD was used in permanent hair dyes but not in semipermanent dyes. More recently, PPD has been used in ...