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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 .
Agents, mixtures and exposure circumstances that do not fall into any other group are also placed in this category. The IARC Monographs on which this list is based assess the hazard linked to the agents, they do not assess the cancer risk of the agents. [1] The list is up-to-date as of January 2024. [2]
N,N′-Di-2-butyl-1,4-phenylenediamine is an aromatic amine used industrially as an antioxidant to prevent degradation of turbine oils, transformer oils, hydraulic fluids, lubricants, waxes, and greases. It is particularly effective for hydrocarbon products produced by cracking or pyrolysis, which are characterized by high alkene content.
A diamine is an amine with exactly two amino groups.Diamines are used as monomers to prepare polyamides, polyimides, and polyureas.The term diamine refers mostly to primary diamines, as those are the most reactive.
IARC group 2B substances, mixtures and exposure circumstances are those that have been classified as "possibly carcinogenic to humans" by the International Agency for Research on Cancer (IARC) as [1] This category is used when there is limited evidence of carcinogenicity in humans and less than sufficient evidence of carcinogenicity in experimental animals.
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Benzimidazole was discovered during research on vitamin B 12. The benzimidazole nucleus was found to be a stable platform on which drugs could be developed. [3] Benzimidazole is produced by condensation of o-phenylenediamine with formic acid, [4] or the equivalent trimethyl orthoformate: C 6 H 4 (NH 2) 2 + HC(OCH 3) 3 → C 6 H 4 N(NH)CH + 3 CH ...
6PPD is an organic chemical widely used as stabilising additive (or antidegradant) in rubbers, such as NR, SBR and BR; all of which are common in vehicle tires. [1] Although it is an effective antioxidant it is primarily used because of its excellent antiozonant performance.