SCA endorses products with the Toxic-Free Tick, that do not contain PPD. “Hair dye containing paraphenylenediamine (PPD) is widely used in India because of its free availability and low cost. PPD produces local as well as systemic toxic effects when applied topically and/or ingested. It is highly toxic when taken by mouth and the outcome depends mainly on the dose taken.” - NCBI
CAS No: 106-50-3. PPD phenylenediamin; and "Synonym(s): p-PHENYLENEDIAMINE, 1,4-BENZENEDIAMINE; 1,4-PHENYLENEDIAMINE; 1,4BENZENEDIAMINE; CI 76060; OXIDATION BASE 10; P-AMINOANILINE; P-DIAMINOBENZENE; 1,4-BENZENEDIAMINE (9CI) ; 1,4-DIAMINOBENZENE; 1,4-PHENYLENEDIAMINE; 4-AMINOANILINE" EWG
HOW IS IT USED?
"Paraphenylenediamine (PPD) is found in most permanent hair dyes. Those who are allergic will likely develop a rash not on the scalp but around the hairline on the forehead and neck and behind the ears. According to Gross, allergy to PPD seems to increase with age. Avoid contact by requesting PPD-free dyes or opting for henna and color rinses that don't contain the irritant." - MarieClaire
RESEARCH - WHAT DO THE EXPERTS SAY
European Union permitts PPD only for products for use on skin. NICNAS issued a warning June 2014 contamination by phenylenediamine and heavey metals.
WHAT IS PPD?
Paraphenylenediamine (PPD) is a chemical substance that is widely used in permanent hair dyes.
"PPD is also present in many inks used for temporary tattoos. The FDA stated, “So-called “black henna” may contain the “coal tar” color p-phenylenediamine, also known as PPD. This ingredient may cause allergic reactions in some individuals. The only legal use of PPD in cosmetics is as a hair dye." And, "PPD is potentially capable of causing multiple toxic effects following skin contact." And, "PPD has potent skin-sensitizing properties." And, "Studies have also identified the chemical as the third most common ingredient, after fragrances and preservatives, that can cause contact dermatitis from cosmetics"- AnnMarie