Molekula
Barium sulfate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Barium sulfate is an inorganic compound composed of barium, sulfur, and oxygen, widely used as a radiopaque contrast agent in medical imaging, a filler in paints and plastics, and in drilling fluids for oil and gas exploration. It appears as a white, odorless powder insoluble in water and most solvents. With a CAS number of 7727-43-7, molecular formula BaSO₄, and molecular weight of 233.39 g/mol, it requires no special storage beyond ambient conditions and carries no hazard signal word. Molekula supplies barium sulfate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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1 kg — £38.70 per pack ex VAT · £46.44 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| Identification | Conforms to reference |
| Assay | ≥98.00% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White, orthorhombic crystals |
| Odour | Odorless |
| Melting Point | 1580 °C |
| Boiling Point | 1600 °C (Decomposes) |
| Density | 4.49 g/cm³ |
| Solubility (other solvents) | Soluble in hot concentrated sulfuric acid; practically insoluble in dilute acids and alcohol |
| Vapour Pressure | 0 mmHg (approx) |
Source: PubChem CID 24414 (HSDB, The National Institute for Occupational Safety and Health (NIOSH))
Identification
| Property | Value |
|---|---|
| SKU | 21615331 |
| CAS Number | 7727-43-7 |
| IUPAC Name | barium(2+) sulfate |
| EC Number | 231-784-4 |
| Molecular Formula | BaSO4 |
| Molecular Weight | 233.39 |
| Exact Mass | 233.857 |
| SMILES | [O-]S(=O)(=O)[O-].[Ba+2] |
| InChIKey | TZCXTZWJZNENPQ-UHFFFAOYSA-L |
| InChI | InChI=1S/Ba.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2 |
| PubChem CID | 24414 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 2833.27.0000 |
| Tariff Code | 2833270000 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, English (US), French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Baritop
- Barium sulphate
- Barosperse
- Barotrast
- Esophotrast
- Liquipake
- Macropaque
- Micropaque
- Microtrast
- Radiobaryt
Frequently asked questions
What is barium sulfate commonly used for?
Barium sulfate is primarily used as a radiocontrast agent in medical imaging (e.g., X-rays and CT scans) and as a filler/pigment in paints, plastics, and rubber.
What is the chemical formula and molecular weight of barium sulfate?
The chemical formula is **BaSO₄**, and the molecular weight is **233.39 g/mol**.
How should barium sulfate be stored?
Store barium sulfate in a cool, dry place at ambient temperature, away from moisture and incompatible substances.
What grades of barium sulfate does Molekula supply?
Molekula supplies **pharmaceutical-grade** and **technical-grade** barium sulfate, depending on the application requirements.
Can Molekula supply barium sulfate in bulk quantities?
Yes, Molekula can supply barium sulfate in bulk, with quantities tailored to customer needs—please contact us for specific packaging options.
What documentation comes with a barium sulfate order?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.