Tantalum(V) oxide

CAS 1314-61-0Ta2O5MW 441.87 g/mol

Tantalum(V) oxide (CAS 1314-61-0) — formula Ta2O5, molecular weight 441.87 g/mol.

Product Overview

CAS Number	1314-61-0
Molecular Formula	Ta2O5
Molecular Weight	441.87 g/mol
Melting Point	1872 °C

Technical Profile

What this product is

Tantalum(V) oxide is a chemical compound with CAS registry number 1314-61-0 and molecular formula Ta2O5 (molecular weight 441.87 g/mol).

Identification

CAS number: 1314-61-0

Its molecular formula Ta2O5 comprises 2 Ta, 5 O atoms.

Also known as: Tantalum(V) oxide · 五氧化二钽

Frequently Asked Questions

What is the CAS number of Tantalum(V) oxide?

The CAS registry number of Tantalum(V) oxide is 1314-61-0.

What is the molecular formula and molecular weight of Tantalum(V) oxide?

Molecular formula Ta2O5, molecular weight 441.87 g/mol.

What other names is Tantalum(V) oxide known by?

It is also registered under: Tantalum(V) oxide, 五氧化二钽.

PubChem Public Data

Independent reference data for Tantalum(V) oxide (CAS 1314-61-0), compiled from public chemistry databases.

Registry identifiers across databases

CAS Registry Number	1314-61-0
PubChem CID	62157
Molecular formula	Ta2O5
Molecular weight	441.87 g/mol
IUPAC name	pentakis(oxygen(2-));bis(tantalum(5+))
InChIKey	BPUBBGLMJRNUCC-UHFFFAOYSA-N
UNII (FDA)	OEZ64Z53M4

Computed descriptors

Molecular Weight	441.89
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	0
Exact Mass	441.87057
Monoisotopic Mass	441.87057
Topological Polar Surface Area	5
Heavy Atom Count	7

Physicochemical values on record

Melting Point	1872 °C
Density	8.2 @25 °C

Documented uses on record

Synonyms and trade names

Tantalum(V) oxide; Tantalum pentoxide; Tantalum oxide (Ta2O5); Tantalic acid anhydride; Ditantalum pentaoxide; Tantalum penta oxide; OEZ64Z53M4; DTXSID10893849; tantalumpentoxide; RefChem:891102; DTXCID601323889; 215-238-2; 1314-61-0; TANTALUM OXIDE; Tantalum oxide dusts; oxygen(2-);tantalum(5+)

Regulatory listings held on file

GHS notification summary	97.5% (78 / 80)

GHS hazard classification

GHS notification summary	97.5% (78 / 80)

This chemical does not meet GHS hazard criteria for 97.5% (78 of 80) of all reports.

Reported as not meeting GHS hazard criteria by 78 of 80 companies (only 2.5% companies provided GHS information). For more detailed information, please visit ECHA C&L website.

What the public record says

Tantalum(V) oxide is identified by CAS 1314-61-0, molecular formula Ta2O5 and molecular weight 441.87 g/mol. UNII OEZ64Z53M4; InChIKey BPUBBGLMJRNUCC-UHFFFAOYSA-N. Melting Point: 1872 °C; Density: 8.2 @25 °C.

Physical description and handling notes

Source: PubChem / Wikidata; the batch COA governs where values differ.