A chemical or mixture that can cause illness, death, disease, or birth defects. The quantities and exposures necessary to cause these effects can vary widely. Many toxic substances are pollutants and contaminants in the environment.
A chemical or mixture that may present an unreasonable risk of injury to health or the environment.
A substance that is present in the soil or the above ground atmosphere that inhibits the growth of plants and ultimately may cause deficiency symptoms or their death.
Any substance that can cause acute or chronic injury to the human body, or which is suspected of being able to cause diseases or injury under some conditions.
A substance that causes disease or death when organisms are exposed to it in very low quantities.
Any substance that presents a significant risk of injury to health or the environment through exposure.
a substance that can cause short-term or long-term damage to biological tissue following contact or absorption. Routes of exposure of the substance include ingestion, inhalation, or assimilation into any organism, either directly from the environment or indirectly by ingestion through food chains.
a biological, chemical or physical agent (or a combination of such agents) whose presence or use in the workplace may endanger the health or safety of a worker
a chemical pollutant that is not a naturally occurring substance in aquatic ecosystems
a poisonous pollutant that is not normally in water
a substance that can be poisonous or cause health effects
a substance that can cause disease, malignancy, genetic mutation, death, or similar consequences
A toxic compound occurring naturally or added to the environment that may be found in shellfish for which a regulatory tolerance limit has been established or which the Ministry of Health or Ministry of Agriculture and Fisheries [New Zealand] determines to be hazardous. Examples of naturally occurring toxic substances are marine biotoxins and trace elements geologically leached from the environment, such as mercury, zinc and copper; examples of added substances are agricultural pesticides, polynuclear aromatics from oil spills and polychlorinated biphenyls. (4)
Any chemical substance or biological agent, such as bacteria, virus, and fungus, which is any of the following: Â Â Â Â â€¢ Listed in the latest edition of the National Institute for Occupational Safety and Health (NIOSH) Registry of Toxic Effects of Chemical Substances (RTECS) Â Â Â Â â€¢ Shows positive evidence of an acute or chronic health hazard in testing conducted by, or known to, the employer. Â Â Â Â â€¢ The subject of a material safety data sheet kept by or known to the employer showing the material may pose a hazard to human health.
Any substance that can be harmful to plant or animal life; such substances may cause chronic (long-term) toxicity in which harmful levels of the substance accumulate over time, or cause acute toxicity with immediate, harmful effects.
A generic term referring to a harmful substance or group of substances. Typically, these substances are especially harmful to health, such as those considered under EPA’s hazardous substance program. Technically, any compound that has the potential to produce adverse health effects is considered a toxic substance.
Material causing injury to living organisms as a result of physicochemical interactions SN chemical etiologic agent, poison, toxicant, toxic chemical, toxic material
See Toxic Agent.
A chemical, physical, or biological agent that may cause an adverse effect or effects to biological systems.
A chemical substance or agent which may cause an adverse effect or effects to biological systems. This definition archived 9/30/03