硫酸钡

Description

Barium sulfate · CAS 7727-43-7 · BaSO4. UNII 25BB7EKE2E. Melting Point: 2876 °F (NIOSH, 2024); Melting Point: 1580; Melting Point: 1580 °C.

Identification

CAS Registry Number	7727-43-7
PubChem CID	24414
Molecular formula	BaSO4
IUPAC name	barium(2+) sulfate
UNII (FDA)	25BB7EKE2E

Computed Descriptors

Molecular Weight	233.39
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	0
Exact Mass	233.856977
Monoisotopic Mass	233.856977
Topological Polar Surface Area	88.6
Heavy Atom Count	6
Formal Charge	0
Complexity	62.2

Physical & Chemical Properties

Melting Point	2876 °F (NIOSH, 2024)
Melting Point	1580
Melting Point	1580 °C
Melting Point	2876 °F
Solubility	0.0002 % at 64 °F (NIOSH, 2024)
Solubility	(64 °F): 0.0002%
Density	4.49 g/cu cm
Density	4.5 g/cm³
Density	4.25-4.5
Density	4.49 @25 °C

Physical description & handling notes

• Wet Solid; Dry Powder; CBI; Dry Powder; Wet Solid; Large Crystals; Liquid; Other Solid; Liquid; Dry Powder; Liquid
• Dry Powder
• White or yellowish, odorless powder; [NIOSH] Insoluble in water; [HSDB]
• ODOURLESS TASTELESS WHITE OR YELLOWISH CRYSTALS OR POWDER.
• White or yellowish, odorless powder.
• Fine, heavy powder or polymorphous crystals

Regulatory Status

Regulatory & Food Contact	FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS CIR / INCI: Cosmetic ingredients (Barium Sulfate) -> CIR (Cosmetic Ingredient Review) CIR / INCI: Cosmetic colorant; Opacifying
GHS notification summary	91% (1648 / 1811)

GHS Hazard Classification

GHS notification summary	91% (1648 / 1811)
Reported hazard statements	H302 (16.6%), H332 (16.6%), H372, H402, H412

Documented Uses

• Used in paper, paints, textiles, plastics, batteries, and x-ray contrast dye; [HSDB]
• Battery Manufacturing [Category: Industry]
• Pulp and Paper Processing [Category: Industry]
• Textiles (Fiber & Fabric Manufacturing) [Category: Industry]
• Painting (Pigments, Binders, and Biocides) [Category: Paint]
• Glass Manufacturing [Category: Industry]

Synonyms

BARIUM SULFATE; 7727-43-7; Baritop; Barium sulphate; Barosperse; Barotrast; Esophotrast; Liquipake; Macropaque; Micropaque; Microtrast; Radiobaryt; Radiopaque; EntroBar; EneMark; EneCat

Frequently Asked Questions

What are the CAS number and molecular formula of Barium sulfate?

CAS 7727-43-7; molecular formula BaSO4; molecular weight — g/mol.

What other names is Barium sulfate known by?

BARIUM SULFATE, 7727-43-7, Baritop, Barium sulphate, Barosperse, Barotrast.

What is the regulatory status of Barium sulfate?

Documented regulatory listings: FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS; CIR / INCI: Cosmetic ingredients (Barium Sulfate) -> CIR (Cosmetic Ingredient Review); CIR / INCI: Cosmetic colorant; Opacifying.

Is Barium sulfate classified as hazardous?

91% of GHS notifications report no hazard classification (1648 of 1811).

What are the key physical properties of Barium sulfate?

Melting Point: 2876 °F (NIOSH, 2024); Melting Point: 1580; Melting Point: 1580 °C; Melting Point: 2876 °F.

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.