Find out how we can help you:

Barium sulfate

Barium sulfate (or sulphate) is the inorganic compound with the chemical formula BaSO4. It is a white crystalline solid that is odorless and insoluble in water. It occurs as the mineral barite, which is the main commercial source of barium and materials prepared from it. The white opaque appearance and its high density are exploited in its main applications.

This page uses material from the related Wikipedia article which is released under the Creative Commons Attribution-Share-Alike License 3.0.

Looking to buy Barium sulfate?

Enquire now about bulk ordering

If you’re interested in further information or purchasing this product please submit your details in the form below and we will get back to you shortly. If you would rather discuss the product by phone please contact us on +44 (0) 1494 728458.

Further Information

Identifiers

CAS Number: 7727-43-7

JSmol: Interactive image

ChEBI: CHEBI:133326

ChEMBL: ChEMBL2105897

ChemSpider: 22823

ECHA InfoCard: 100.028.896

EC Number: 231-784-4

PubChem: 24414

RTECS number: CR060000

UNII: 25BB7EKE2E

Properties

Chemical formula: BaSO

Molar mass: 233.38 g/mol

Appearance: white crystalline

Odor: odorless

Density: 4.49 g/cm

Melting point: 1,580 °C (2,880 °F; 1,850 K)

Boiling point: 1,600 °C (2,910 °F; 1,870 K) (decomposes)

Solubility in water: 0.0002448 g/100 mL (20 °C)
0.000285 g/100 mL (30 °C)

Solubility product: 1.0842 × 10 (25 °C)

Solubility: alcohol

Magnetic susceptibility: -71.3·10 cm/mol−63

Refractive index: 1.636 (alpha)

Structure

Crystal structure: orthorhombic

Thermochemistry

Std molar
entropy: 132 J·mol·K−1−1

Std enthalpy of
formation: −1465 kJ·mol−1

Pharmacology

ATC code: WHOV08BA01

Routes of
administration: by mouth, rectal

Pharmacokinetics

Bioavailability: negligible by mouth

Excretion: rectal

Legal status:

Hazards

EU classification: not listed

NFPA 704:

Flash point: noncombustible

NIOSH

PEL: TWA 15 mg/m (total) TWA 5 mg/m (resp)33

REL: TWA 10 mg/m (total) TWA 5 mg/m (resp)33

IDLH: N.D.

Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).