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CHEMICAL SUBSTANCE IDENTIFICATION |
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Chemical name |
Scandium trifluoride |
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Synonyms |
Scandium fluoride [1] |
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IUPAC name |
Scandium trifluoride Scandium(3+) ion trifluoride Scandium(III) fluoride Scandiumtrifluorid [1] |
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CAS No |
13709-47-2 |
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REACH registration number |
pre-registered |
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EC No |
237-255-4 [1] |
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Molecular formula |
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Substance group/chemical family |
mono-constituent substance/inorganic salt |
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Appearance Physical state Odour Form
Colour |
solid [3] odourless [3] powder [3] crystalline ionic compound, cubic crystals at ambient temperatures [7] under pressure also forms different crystal structures (rhombohedral, tetrahedral) [8]
bright white [3] |
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USES AND HANDLING ISSUES |
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Relevant identified uses |
Scandium Fluoride is applied in optical coating, catalyst, electronic ceramics, laser industry, and also the main materials for making Scandium metal and alloys. The main application of Scandium by weight is in Scandium-Aluminium alloys for minor aerospace industry components. Some items of sports equipment, which rely on high performance materials, have been made with Scandium-Aluminium alloys, including baseball bats, and bicycle frames and components. Lacrosse sticks are also made with Scandium. [6] |
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Handling considerations |
Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Provide appropriate exhaust ventilation at places where dust is formed. Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Never allow product to get in contact with water during storage. Do not store near acids. Do not store in glass. [12] |
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PHYSICO-CHEMICAL PROPERTIES |
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Molecular weight |
101.951 g/mol [2, 5] |
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Bulk density/Specific gravity |
2.53 g/cm3 [3, 5] (predicted) |
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pH |
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Particle size |
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EC |
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Melting point |
1515 °C [3, 5](predicted) |
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Boiling point |
1607° C [3](predicted) |
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Flash point |
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Flammability |
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Vapour density |
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Vapour pressure |
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Solubility in water |
slightly soluble in water but dissolves in the presence of excess fluoride to form the ScF63− anion [9] |
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Solubility in organic solvents |
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Solubility in inorganic solvents |
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Hydrolysis |
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Ionicity in water |
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Surface tension |
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Dispersion properties |
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Specific surface |
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Stability and reactivity |
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Chemical stability |
hygroscopic [6] |
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Reactivity hazards |
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Corrosivity |
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Polimerization |
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Incompatibility with various substances |
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Special remarks on reactivity |
Contact with acids liberates very toxic gas. Scandium Fluoride exhibits the unusual property of negative thermal expansion, meaning it shrinks when heated. [7]. |
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Physical, chemical and biological coefficient |
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Koc |
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Kow |
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pKa |
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log Kp |
0.22 [4] |
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Henry-constant |
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ENVIRONMENTAL FATE AND BEHAVIOUR |
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Artificial pollution sources |
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General terrestrial fate |
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General aquatic fate |
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General atmospheric fate |
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General persistence and degradability |
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Abiotic degradation and metabolites |
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Biodegradation and metabolites |
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Bioconcentration |
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Volatilization |
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Photolysis |
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Hydrolysis |
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Soil adsorption and mobility |
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ENVIRONMENTAL CONCENTRATIONS |
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Measured data |
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ECOTOXICOLOGICAL INFORMATION |
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General adverse effects on ecosystem |
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Acute toxicity (LC50, EC50) |
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Aquatic systems |
Data lacking [11] |
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Terrestrial systems |
Data lacking [11] |
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Chronic toxicity (NOEC, LOEC) |
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Aquatic systems |
Data lacking [11] |
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Terrestrial systems |
Data lacking [11] |
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HUMAN HEALTH EFFECTS and PROTECTION |
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Routes of human exposures |
oral, dermal, inhalation [11] |
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General effects |
Toxic if swallowed (Acute Tox. 3). Toxic in contact with skin (Acute Tox. 3). Toxic if inhaled (Acute Tox. 3). [11] According to Regulation (EC) No 1272/2008 [12] |
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Endocrine disruption |
Data lacking [11] |
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Mutagenicity |
Data lacking [11] |
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Carcinogenicity |
Data lacking [11] |
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Reprotoxicity |
Data lacking [11] |
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Teratogenicity |
Data lacking [11] |
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Skin, eye and respiratory irritations |
Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation. [11, 12] |
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Metabolism: absorption, distribution & excretion |
Data lacking [11] |
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Exposure limits |
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Drinking water MAC
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Other information |
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Animal toxicity data |
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Acute toxicity (LD50) |
LD>10000mg/kg, mammal (species unspecified), intraperitoneal [10,13] LD>10000mg/kg, mammal (species unspecified), oral [10, 13] |
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Chronic toxicity (NOEL, LOEL) |
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ENVIRONMENTAL STANDARDS AND REGULATIONS |
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| REACH/CLP | There is no harmonised classification and there are no notified hazards by manufacturers, importers or downstream users for this substance. [1] |
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EINECS regulation |
Substances listed in the EINECS, ELINCS, or NLP inventories.̵ [1] |
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OSHA regulations etc. |
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OTHER INFORMATION, SPECIAL REMARKS |
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Classification and proposed labelling with regard to toxicological data |
UN GHS Calssification [13]H301: Toxic if swallowed [Danger Acute toxicity, oral] H311: Toxic in contact with skin [Danger Acute toxicity, dermal] H315: Causes skin irritation [Warning Skin corrosion/irritation] H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation] H331: Toxic if inhaled [Danger Acute toxicity, inhalation] |
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CREATED, LAST UPDATE |
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Created |
16th July, 2018 |
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Last update |
02nd June, 2020 |
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REFERENCES |
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[1] ECHA Infocard, Available from: https://echa.europa.eu/hu/substance-information/-/substanceinfo/100.033.854, Accessed: 02 .06. 2020 [2] NIH, US National Library of Medicine, National Center for Biotechnology Information, Open Chemistry Database, Available from: https://pubchem.ncbi.nlm.nih.gov/compound/83678#section=Depositor-Supplied-Synonyms, Accessed: 16 .07. 2018 [3] Wikipedia, Scandium fluoride, Available from: https://en.wikipedia.org/wiki/Scandium_fluoride, Accessed: 16 .07. 2018 [4] US EPA, Chemistry Dashboard, Scandium fluoride, Available from: https://comptox.epa.gov/dashboard/dsstoxdb/results?search=DTXSID7065594#env-fate-transport, Accessed: 16. 07. 2018 [5] Chemspider, Scandium fluoride, Available from: http://www.chemspider.com/Chemical-Structure.75501.html, Accessed: 16. 07. 2018 [6] ChemicalBook, CAS DataBase List , Scandium trifluoride, Available from: http://www.chemicalbook.com/ChemicalProductProperty_EN_CB0257895.htm, Accessed: 16. 07. 2018 [7] The structural mystery of scandium fluoride illustrated (2017, August 10) Available from: https://phys.org/news/2017-08-mystery-scandium-fluoride.html, Accessed: 16. 07. 2018 [8] Aleksandrov, K. S.; V. N. Voronov; A. N. Vtyurin; A. S. Krylov; M. S. Molokeev; M. S. Pavlovskiĭ; S. V. Goryaĭnov; A. Yu. Likhacheva; A. I. Ancharov (2009). "Pressure-induced phase transition in the cubic ScF3 crystal". Physics of the Solid State. 51 (4): 810–816. doi:10.1134/S1063783409040295. ISSN 1063-7834 [9] Wiberg, E., Holleman, A. F. (2001) Inorganic Chemistry, Elsevier, ISBN 0-12-352651-5. [10] TOXNET, ChemIDplus, Substance, Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 35(8), Pg. 43, 1991, Available from: https://chem.nlm.nih.gov/chemidplus/rn/13709-47-2, Accessed: 18. 07. 2018 [11] ECHA, Information on chemicals, Scandium trifluoride. Available from: https://echa.europa.eu/hu/information-on-chemicals/cl-inventory-database/-/discli/notification-details/103635/798717 [12] Sigma-aldrich, GENERIC EU MSDS, Scandium(III) fluoride. Available from: https://www.sigmaaldrich.com/MSDS [13] Pubchem, Scandium fluoride. https://pubchem.ncbi.nlm.nih.gov/compound/Scandium-fluoride, Accessed: 02. 06. 2020 |
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