SCA endorses products with the Allergy Certified logo, that do not contain PPD. Commonly used in Hair Dyes & Makeup. “When ingested, p-phenylenediamine is highly toxic. Often referred to as hair dye poisoning, p-phenylenediamine can cause respiratory distress and renal failure. It causes swelling in the upper respiratory tract and larynx which causes respiratory distress.” - www.safecosmetics.org
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 THE EXPERTS SAY
European Union permits PPD only for products for use on skin. NICNAS issued a warning June 2014 contamination by phenylenediamine and heavy metals.
WHAT IS PPD?
Paraphenylenediamine (PPD) is a chemical substance that is widely used in permanent hair dyes. PPD can cause cross reactions triggering a secondary allergy to other hair dyes: NCBI PPD Allergy
"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