The Erbium oxide (Er2O3), with its cas registry number 12061-16-4, is a kind of pink powder. And this chemical is insoluble in water while soluble in acid. Besides, it is also sensitive and hygroscopic. What's more, its product categories are various, including Inorganics; 68: Er; ErbiumMaterials Science; Chemical Synthesis; Nanomaterials; Nanoparticles: Oxides, Nitrides, and Other CeramicsNanomaterials; Nanopowders and Nanoparticle Dispersions; ElectrolytesChemical Synthesis; Alternative Energy; Catalysis and Inorganic Chemistry; Erbium; ErbiumMetal and Ceramic Science; Materials Science; Oxides.

The characteristics of this chemical are as follows: (1)#H bond acceptors: 3 ; (2)#H bond donors: 0 ; (3)#Freely Rotating Bonds: 2 ; (4)Polar Surface Area: 43.37 ; (5)Exact Mass: 381.847402; (6)MonoIsotopic Mass: 379.845324; (7)Topological Polar Surface Area: 43.4; (8)Heavy Atom Count: 5; (9)Formal Charge: 0; (10)Complexity: 34.2.

The production method of this chemical is below: to get the sediment of erbium nitrate or the erbium sulfate solution with hydroxide, and then go through a list of process of seperating, firing to get the erbium oxide. The chemical equation of this production way is as below:  2Er(OH)3→Er2O3+3H2O.

As to its usage, it is widely applied in many ways. It could be used as the additive agent for magnetic materials and fluorescent powder, and the material of special fluorescent glass; It could aslo be used as the control material for the YIG and nuclear reactor; It could be then used in producing the glass coloring agent.

When you are dealing with this chemical, you should be very cautious. For being a kind of irritant chemical, it is irritating to eyes, respiratory system and skin and may cause inflammation to the skin or other mucous membranes. Therefore, you should take the following instructions to protect yourself. Wear suitable protective clothing and gloves, and then avoid contacting with skin and eyes. If in case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

Additionally, you could convert the following datas into the molecular structure:
(1)Canonical SMILES: O=[Er]O[Er]=O
(2)InChI: InChI=1S/2Er.3O
(3)InChIKey: VQCBHWLJZDBHOS-UHFFFAOYSA-N 

Below are the toxicity information of this chemical: