Noxious odor substances

Noxious odor substances represent a broad category of volatile chemical compounds, such as thiols, amines, and carboxylic acids, that elicit unpleasant or harmful sensory experiences. These substances are detected by the olfactory system through Olfactory Receptors (G protein-coupled receptors) and the trigeminal system via Transient Receptor Potential (TRP) channels like TRPA1 and TRPV1 (PMID: 17094042, 25313083). Their primary biological role is to act as warning signals for environmental hazards, decay, or toxicity, triggering avoidance behaviors in humans and animals (PMID: 21915011). While not a single therapeutic target, these substances are clinically significant in the context of sensory hypersensitivity, respiratory exacerbations in asthma, and environmental health. Therapeutic approaches typically involve neutralizing the substances using adsorbents or masking agents, or developing antagonists for the specific ion channels they activate to mitigate irritation and pain (PMID: 30050315).

Other names

MalodorsOffensive odorsEnvironmental irritantsFoul-smelling compoundsChemosensory irritantsVolatile organic compounds (VOCs)

Neutralization of volatile molecules through adsorption, complexation, or pharmacological antagonism of sensory receptors such as TRPA1 and TRPV1.