Tuesdayâs debate between the Democratic presidential candidates, including Hillary Clinton and Bernie Sanders, will be streamed online for free. CNN, which is hosting the debate, will have it available on CNN.com and on the networkâs mobile apps. Coverage begins at 8:30 p.m.
Paraphenylenediamine (PPD) is a chemical substance that is widely used as a permanent hair dye. It may also been found in textile or fur dyes, dark coloured cosmetics, temporary tattoos, photographic developer and lithography plates, photocopying and printing inks, black rubber, oils, greases and gasoline.
If you are allergic to PPD, you may also cross-react to any of these: 1  Azo dyes and aniline dyes (often used in semi-permanent and temporary hair dyes). 2  Benzocaine and procaine (anesthetics used by doctors and dentists) Sulfonamides and sulfa drugs. 3  Para-aminobenzoic acid (PABA).f you are allergic to PPD, you may also cross-react to any of these: 1  Azo dyes and aniline dyes (often used in semi-permanent and temporary hair dyes). 2  Benzocaine and procaine (anesthetics used by doctors and dentists) Sulfonamides and sulfa drugs. 3  Para-aminobenzoic acid (PABA).