铌粉

Description

Niobium powder is identified by CAS 7440-03-1, molecular formula Nb and molecular weight 92.91 g/mol. UNII 05175J654G; ChEBI 33344; InChIKey GUCVJGMIXFAOAE-UHFFFAOYSA-N. Boiling Point: 4742 °C @760 [mm Hg]; Melting Point: 2468 °C; Density: 8.57 @25 °C.

Identification

CAS Registry Number	7440-03-1
PubChem CID	23936
Molecular formula	Nb
Molecular weight	92.91 g/mol
IUPAC name	niobium
InChIKey	GUCVJGMIXFAOAE-UHFFFAOYSA-N
UNII (FDA)	05175J654G
ChEBI ID	CHEBI:33344

Computed Descriptors

Molecular Weight	92.90637
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	0
Rotatable Bond Count	0
Exact Mass	92.90637
Monoisotopic Mass	92.90637
Topological Polar Surface Area	0
Heavy Atom Count	1
Formal Charge	0
Complexity	0

Physical & Chemical Properties

Boiling Point	4742 °C @760 [mm Hg]
Melting Point	2468 °C
Density	8.57 @25 °C

Physical description & handling notes

• Shiny, soft, ductile metal that develops a bluish cast after oxidizing in air at room temperature over a long time or after heating to 200 deg C; [

Regulatory Status

GHS notification summary	58% (307 / 529)

GHS Hazard Classification

GHS notification summary	58% (307 / 529)
Reported hazard statements	H228 (34%)

Documented Uses

• There are 18 known isotopes. Ores (niobite or columbite, niobite-tantalite, parochlore, and euxenite) are known in Canada, Brazil, Nigeria, Zaire, and Russia. Used in welding rods, jewelry, and superconductive magnets; Was used in the space program for advanced air frame systems; [ Used in superalloys containing up to 5% niobium to make gas turbine components; [Ullmann]
• Jewelry making [Category: Hobbies]

Synonyms

NIOBIUM; Columbium; 7440-03-1; Niobium element; Niobium-93; 05175J654G; DTXSID4052479; Niobium Metallicum; Niobium 93; RefChem:55714; DTXCID5031052; 231-113-5; niobium atom; Niobium powder; Niobium rod; Niobium turnings

Frequently Asked Questions

What are the CAS number and molecular formula of Niobium powder?

CAS 7440-03-1; molecular formula Nb; molecular weight 92.91 g/mol.

What other names is Niobium powder known by?

NIOBIUM, Columbium, 7440-03-1, Niobium element, Niobium-93, 05175J654G.

Is Niobium powder classified as hazardous?

58% of GHS notifications report no hazard classification (307 of 529).

What are the key physical properties of Niobium powder?

Boiling Point: 4742 °C @760 [mm Hg]; Melting Point: 2468 °C; Density: 8.57 @25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.