chromate, chromium trioxide, chromic acid, lead chromate, sodium chemical description dichromate, potassium dichromate, sodium chromate, and zinc chromate. Most Cr (VI) compounds/ wastes are soluble in water (with the exception of barium chromate and lead chromate) and are typically yellow/ orange in colour. Cr (VI) is a powerful oxidising agent under acidic conditions, which in turn reduces itself to Cr (III) in such a chemical reaction. However, Cr (VI) solutions are much less oxidising under alkaline conditions. Substances or wastes which, if they are H11: Toxic (delayed inhaled or ingested or if they penetrate the Primary hazard or chronic) skin, may involve delayed or chronic effects, including carcinogenicity. Substances or wastes which if released present or may present immediate or Secondary delayed adverse impacts to the environment H12: Ecotoxic hazard Why is it by means of bioaccumulation and/or toxic hazardous? effects upon biotic systems. Substances or wastes which, while in themselves not necessarily combustible, Other hazard(s) H5.1 Oxidising may, generally by yielding oxygen cause, or contribute to, the combustion of other materials. Main likely chemical contaminants Cr (III) Chrome plating, steel manufacturing, casting and foundries, timber Where does it Main sources treatment, leather tanning (primarily Cr III), chemical manufacturing come from? and aerospace industries. Chemical/ physical treatment to immobilise the hazard, then the How is it stabilised material is usually disposed of in hazardous waste landfill. Main fates managed? Some Cr liquid wastes are discharged to sewer under regulatory agreements. Volume score <1% 1 5% 5 10% 10 20% 20% – – – ≥ (% of national tonnes in 2013) 0.02% How much is generated in TOTAL: 1,630 ACT: 0 NSW: 612 Australia? Waste arising in NT: 0 Qld: 195 SA: 9 2013 (tonnes) 0 725 90 Tas: Vic: WA: The most common hazards of human exposure to Cr (VI) Potential health Overview compounds are irritation of the skin, eyes, mouth, throat, lungs and impacts intestines. Acute poisoning, through inhalation, can result in death.
chemical description chromate, chromium trioxide, chromic acid, lead chromate, sodium dichromate, potassium dichromate, sodium chromate, and zinc chromate. Most Cr (VI) compounds/ wastes are soluble in water (with the exception of barium chromate and lead chromate) and are typically yellow/ orange in colour. Cr (VI) is a powerful oxidising agent under acidic conditions, which in turn reduces itself to Cr (III) in such a chemical reaction. However, Cr (VI) solutions are much less oxidising under alkaline conditions. Why is it hazardous? Primary hazard H11: Toxic (delayed or chronic) Substances or wastes which, if they are inhaled or ingested or if they penetrate the skin, may involve delayed or chronic effects, including carcinogenicity. Secondary hazard H12: Ecotoxic Substances or wastes which if released present or may present immediate or delayed adverse impacts to the environment by means of bioaccumulation and/or toxic effects upon biotic systems. Other hazard(s) H5.1 Oxidising Substances or wastes which, while in themselves not necessarily combustible, may, generally by yielding oxygen cause, or contribute to, the combustion of other materials. Main likely chemical contaminants Cr (III) Where does it come from? Main sources Chrome plating, steel manufacturing, casting and foundries, timber treatment, leather tanning (primarily Cr III), chemical manufacturing and aerospace industries. How is it managed? Main fates Chemical/ physical treatment to immobilise the hazard, then the stabilised material is usually disposed of in hazardous waste landfill. Some Cr liquid wastes are discharged to sewer under regulatory agreements. How much is generated in Australia? Volume score (% of national tonnes in 2013) <1% 1 – 5% 5 – 10% 10 – 20% ≥ 20% 0.02% Waste arising in 2013 (tonnes) TOTAL: 1,630 ACT: 0 NSW: 612 NT: 0 Qld: 195 SA: 9 Tas: 0 Vic: 725 WA: 90 Potential health impacts Overview The most common hazards of human exposure to Cr (VI) compounds are irritation of the skin, eyes, mouth, throat, lungs and intestines. Acute poisoning, through inhalation, can result in death.