Hexavalent chromium definition

Hexavalent chromium means the form of chromium in a valence state of +6.
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Hexavalent chromium means the form of chromium with a valence state of +6.
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Hexavalent chromium means the oxidation state of chromium with an oxidation number of +6; a coordination number of 4 and tetrahedral geometry.
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Examples of Hexavalent chromium in a sentence

  • Hexavalent chromium compounds may be in the welding fume of consum- ables or base metals which contain chromium.

  • Hexavalent chromium is associated with allergic skin reactions which may appear as contact dermatitis and skin ulcerations.

  • Hexavalent chromium and its compounds are on the IARC and NTP lists as posing a cancer risk to humans.Arc rays: Skin cancer has been reported.

  • Long term overexplosure to nickel fumes may also cause pulmonary fibrosis and oedema.Cr: Hexavalent chromium and its compounds are on the IARC and NTP lists as posing a cancer risk to humans.Arc rays: Skin cancer has been reported.

  • Hexavalent chromium and its compounds are on the IARC and NTP lists as posing a cancer risk to humans.

  • Hexavalent chromium sample results were below precise laboratory detection limits at all locations.

  • In particular, the products have been tested as needed for the presence of Lead, Cadmium, Mercury, Hexavalent chromium, Polybrominated biphenyls (PBB), and Polybrominated diphenyl ethers (PBDE).

  • For Lead, PBB, PBDE, mercury and Hexavalent chromium, there must be no more than 0.1% of the material, when calculated by weight at raw homogeneous materials.

  • Hexavalent chromium compounds exist as tetrahedral chromate anions, resembling the forms of other natural anions like sulfate and phosphate which are permeable across nonselective membranes.

  • Hexavalent chromium conversion coatings are Jar gely used to prevent corrosion of aluminium alloys.

Related to Hexavalent chromium

  • Polystyrene foam means blown polystyrene and expanded and

  • Carcinogen means a chemical that causes an increased incidence of benign or malignant neoplasms, or a substantial decrease in the latency period between exposure and onset of neoplasms through oral or dermal exposure, or through inhalation exposure when the cancer occurs at nonrespiratory sites in at least one (1) mammalian species or man through epidemiological studies or clinical studies, or both.

  • Fungi means any type or form of fungus, including mold or mildew, and any mycotoxins, spores, scents or by-products produced or released by fungi.

  • Polystyrene foam adhesive means an aerosol adhesive designed to bond polystyrene foam to substrates.

  • Hydrofluorocarbons means compounds that only contain hydrogen, fluorine, and carbon.

  • Nitrogen oxides means nitric oxide and nitrogen dioxide, expressed as nitrogen dioxide (NO2);

  • Dielectric material means a material that does not conduct direct electrical current. Dielectric coatings are used to electrically isolate UST systems from the surrounding soils. Dielectric bushings are used to electrically isolate portions of the UST system (e.g., tank from piping).

  • High global warming potential hydrofluorocarbons means any hydrofluorocarbons in a particular end use for which EPA’s Significant New Alternatives Policy (SNAP) program has identified other acceptable alternatives that have lower global warming potential. The SNAP list of alternatives is found at 40 CFR Part 82 subpart G with supplemental tables of alternatives available at (http://www.epa.gov/snap/).

  • Perfluoroalkyl and polyfluoroalkyl substances or “PFAS” means a class of fluorinated organic chemicals containing at least one fully fluorinated carbon atom.

  • Fungus means any type or form of fungus, including mold or mildew, and any mycotoxins, spores, scents or by-products produced or released by fungi.

  • Biodegradable means degradable through a process by which fungi or bacteria secrete enzymes to convert a complex molecular structure to simple gasses and organic compounds.

  • Insecticide fogger means any insecticide product designed to release all or most of its content, as a fog or mist, into indoor areas during a single application.

  • Electrostatic spray means a method of applying a spray coating in which opposite electric charges are applied to the substrate and the coating. The coating is attracted to the substrate by the electrostatic potential between them.

  • Chemical agent shall mean any compound which, when suitably disseminated, produces incapacitating, damaging or lethal effects on people, animals, plants or material property.

  • Defoliant means any substance or mixture of substances intended for causing the leaves or foliage to drop from a plant, with or without causing abscission.

  • Airborne radioactive material means any radioactive material dispersed in the air in the form of dusts, fumes, particulates, mists, vapors, or gases.

  • Radionuclide means a radioactive element or a radioactive isotope.

  • Semisolid means a product that, at room temperature, will not pour, but will spread or deform easily, including but not limited to gels, pastes, and greases.

  • Riprap means small, broken stones or boulders placed compactly or irregularly on dykes or similar embankments for protection of earth surfaces against wave action or current;

  • Anaerobic digester means a liquid manure storage area that is constructed with the intent to capture and combust gas emissions resulting from the digestion of waste by microbes in anaerobic conditions. An anaerobic digester is a LMSA and is required to comply with all requirements applicable to LMSAs. Requirements specific to anaerobic digesters will be noted when applicable.

  • Toxic chemical means a chemical or chemical category listed in 40 CFR 372.65.

  • PCBs means polychlorinated biphenyls.

  • Halogen means one of the chemical elements chlorine, bromine or iodine.

  • Crawling bug insecticide means any insecticide product that is designed for use against ants, cockroaches, or other household crawling arthropods, including, but not limited to, mites, silverfish or spiders. “Crawling Bug Insecticide” does not include products designed to be used exclusively on humans or animals, or any house dust mite product. For the purposes of this definition only:

  • Cyanoacrylate adhesive means any adhesive with a cyanoacrylate content of at least 95% by weight.

  • Isomer means all enantiomers and diastereomers.