Erbium(III) acetate

Erbium(III) acetate is the acetate salt of erbium, with the proposed chemical formula of Er(CH₃COO)₃. It can be used to synthesize some optical materials.^[2]

Erbium(III) acetate

Names
Other names Erbium acetate Erbium triacetate
Identifiers
CAS Number	25519-10-2 Y
3D model (JSmol)	Interactive image
ChemSpider	147292
ECHA InfoCard	100.042.774
EC Number	247-067-4
PubChem CID	168385
CompTox Dashboard (EPA)	DTXSID60890803
InChI InChI=1S/3C2H4O2.Er/c3*1-2(3)4;/h3*1H3,(H,3,4);/q;;;+3/p-3 Key: DBUHPIKTDUMWTR-UHFFFAOYSA-K
SMILES CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].[Er+3]
Properties
Chemical formula	Er(CH3COO)3
Appearance	light pink solid
Solubility in water	soluble
Hazards
GHS labelling:[1]
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, P501
Related compounds
Other cations	Holmium(III) acetate Thulium(III) acetate
Related compounds	Erbium oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Physical properties

The tetrahydrate of erbium(III) acetate is thermally decomposed at 90 °C, giving a proposed anhydride:

Er(CH₃COO)₃·4H₂O → Er(CH₃COO)₃ + 4 H₂O

Continued heating to 310 °C will form ketene:

Er(CH₃COO)₃ → Er(OH)(CH₃COO)₂ + CH₂=C=O

At 350 °C, the proposed Er(OH)(CH₃COO)₂ loses acetic acid to yield a material of the formula ErOCH₃COO, forming Er₂O₂CO₃ at 390 °C, finally obtaining Er₂O₃ at 590 °C.^[3]