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This is of particular interest in the area of polyurethane coatings, where light stability is a critical factor and is the main reason that aliphatic isocyanates are used in making polyurethane coatings. When PU foam, which is made using aromatic isocyanates, is exposed to visible light, it discolors, turning from off-white to yellow to reddish ...
The only known environmental effect is related to how chloroprene is volatile and spreads rapidly through the air. This highly flammable component increases the possibility of causing a fire or explosion releasing irritating or toxic fumes (or gases). [23] In 2022, a request made by Denka to regulate chloroprene emissions was rejected by EPA.
Its main use is in the manufacture of precursors to polyurethane, dyes, and other industrial chemicals. Like most volatile amines, it has the odor of rotten fish. It ignites readily, burning with a smoky flame characteristic of aromatic compounds. [7] It is toxic to humans. Relative to benzene, aniline is "electron-rich".
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A lethal dose for rats is between 150 ppm and 220 ppm, meaning the air in the building was highly toxic. On 27 January 2013, a fire at the Kiss nightclub in the city of Santa Maria, in the south of Brazil, caused the poisoning of hundreds of young people by cyanide released by the combustion of soundproofing foam made with polyurethane. By ...
Black women buy $7.5 billion worth of beauty products every year, and spend 9x more on ethnic hair products than any other demographic. The measures in place to protect them aren’t enough.
p-Phenylenediamine (PPD) is an organic compound with the formula C 6 H 4 (NH 2) 2.This derivative of aniline is a white solid, but samples can darken due to air oxidation. [1] It is mainly used as a component of engineering polymers and composites like kevlar.
Since August 2012, the new standard EN 14362-1:2012 Textiles - Methods for determination of certain aromatic amines derived from azo colorants - Part 1: Detection of the use of certain azo colorants accessible with and without extracting the fibres is effective.