СУЛЬФАТ ЭРБИЯ

Description

Erbium sulfate is a salt of the lanthanide erbium and sulfuric acid, usually supplied in the form of octahydrate. Synonyms: erbium sulfate octahydrate, erbium(III) sulfate, erbium(III) sulfate 99.9% (REO). UNII: 76R3969825, DSSTox ID: DTXSID40648465. In the rare earth purity nomenclature, the designation "99.9% (REO)" indicates the rare earth oxide content of the pure compound, which is a standard way of marking the purity of raw materials for the optical and electronics industries.

Basic Attributes

• CAS No.: 10031-52-4
• Chemical Formula: Er2H16O20S3
• Molecular Weight: 766.83
• Exact weight: 763.8
• EU number: 236-779-0
• PSA specification: 339.76
• XLogP3: -1.286

Physico-chemical characteristics

• Appearance: Crystalline
• Density: 3.217 g/cm3
• Solubility in water: soluble in water

Chemical properties and application

Erbium sulfate is a water-soluble salt of trivalent erbium, the extremely high PSA value (339.76) reflects the large number of oxygen atoms in the three sulfate groups and molecules of water of crystallization. As a soluble lanthanide salt, erbium sulfate is used in inorganic synthesis as a source of the Er3+ ion for the preparation of other erbium compounds by precipitation, and also as a reagent in the analytical chemistry of lanthanides. Erbium compounds are generally used as dopants for optical materials (glasses and crystals for EDFA fiber amplifiers and solid-state lasers around 1550 and 2940 nm), in the production of specialty ceramics, colored glass, and as a component of some metal alloys.

The high density of the substance (3.217 g/cm3) is typical for crystalline hydrates of salts of heavy lanthanides - the atomic mass of erbium (167.26) significantly exceeds the mass of most transition metals, which is reflected in the density of all its inorganic compounds. Solubility in water makes erbium sulfate a convenient form for introducing the Er3+ ion into aqueous technological solutions during the synthesis of doped materials by co-precipitation or the sol-gel process.

Safety Information

• Hazard class code: 36/37/38
• Safety instructions: 26-36

Features of the substance

The high density of the substance (3.217 g/cm3) is typical for crystalline hydrates of salts of heavy lanthanides - the atomic mass of erbium (167.26) is significantly higher than the mass of most transition metals, which naturally affects the density of all its inorganic compounds, including sulfate. Good solubility in water distinguishes erbium sulfate from many other salts and simplifies its use in liquid-phase technological processes.

Storage and transportation

Store in an airtight container in a dry place, away from sources of moisture. Wear gloves and safety glasses, avoid inhaling dust and contact with skin and eyes - the substance is irritating to the skin, eyes and respiratory tract. No official UN transport codes have been assigned for the compound; it is transported as a laboratory reagent in small packages, taking into account the requirements for containers that exclude contact with moisture.