ОКСАЛАТ СКАНДИЯ

Description

Scandium oxalate is a salt of oxalic acid and scandium, CAS 17926-77-1, English. Scandium oxalate. Belongs to the class of oxalates of rare earth and related elements; Scandium is not formally included in the lanthanide group, but in terms of the chemical behavior of the trivalent cation and the method of obtaining the oxalate, it behaves similarly to yttrium and lanthanide oxalates. Synonyms: scandium oxalate hydrate, scandium(III) oxalate pentahydrate.

Basic Attributes

• CAS No.: 17926-77-1
• Chemical formula: C6H20O22Sc2 (hydrate form)
• Molecular Weight: 534.12
• Exact weight: 269.866
• EU number: 236-523-8
• PSA Specs: 189.57
• XLogP3: -7.341

Physico-chemical characteristics

• Melting point: >500 °C

Scope of application

Scandium oxalate is an intermediate compound in the technology for producing high-purity scandium oxide (Sc2O3) and metallic scandium: precipitation of oxalate from solutions of scandium raw materials followed by calcination (calcination) is a standard analytical and industrial technique for purifying rare earth and related elements from foreign cations, since different oxalates have different solubilities and allow the separation of metals fractional precipitation. The resulting scandium oxide is used in the production of solid oxide fuel cells, high-strength aluminum-scandium alloys for aerospace and sports equipment, specialty glasses and ceramics, and high-intensity lamps (scandium iodide lamps). The slightly soluble form of the compound is also used in analytical chemistry for the gravimetric determination of scandium.

Safety Information

• Transport codes: NONH for all modes of transport
• Hazard class code: 36/37/38
• Safety instructions: 26-36
• Tags: Xi
• Hazard Statements: H315-H319-H335
• Precautions: P261, P305+P351+P338

Storage and handling

Store in a tightly closed container in a dry, ventilated area. When working, avoid inhaling dust (P261), in case of contact with eyes, rinse with plenty of water (P305+P351+P338), use gloves and safety glasses. The compound is slightly soluble in water, which reduces the risk of rapid absorption in case of accidental contact, but requires standard protective measures when working with powder.

Scandium's place among rare metals

Scandium is geochemically dispersed and rarely forms its own deposits; it is more often extracted as a by-product during the processing of titanium, zirconium, uranium and tin ores. The oxalate precipitation technology used for its isolation and purification is similar to the methods used for yttrium and lanthanides, with which scandium is often associated in the feedstock, although it is not formally included in the lanthanide group. That is why scandium oxalate occupies an important place in the overall technological chain for the separation of rare and rare earth elements.