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Barium Sulphide is an inorganic compound composed of barium and sulphur, with the chemical formula BaS. Also known as barium monosulphide or barium(II) sulphide, it belongs to the metal sulphide family and is relevant to inorganic chemistry and specialised materials research. Anhydrous Barium Sulphide has a formula mass of approximately 169.39 g/mol and may appear as a white, grey, or darker solid depending on its purity and physical condition. It reacts with acids to release hydrogen sulphide gas, which is highly toxic, making chemical compatibility and controlled handling essential. Barium Sulphide Laboratory Reagent may be considered for selected research procedures and the preparation of other barium compounds when the specified product characteristics meet the method requirements. Because of its toxicity and reactive properties, it requires trained personnel, appropriate ventilation, suitable protective equipment, and carefully controlled storage and hazardous-waste disposal.
Product Specifications
| Specification | Details |
|---|---|
| Appearance | Grey powder |
| Assay | 99% |
| Chemical Name | Barium Sulphide |
| Alternate Names | Barium Sulfide, Barium Monosulphide, Barium(II) Sulphide |
| Molecular Formula | BaS |
| Empirical Formula | BaS |
| CAS Number | 21109-95-5 |
| Molecular Weight | 169.39 g/mol |
| Grade | LR Laboratory Reagent |
Key Features of Barium Sulphide
- Defined inorganic composition: Contains barium and sulphide in a 1:1 atomic ratio, making it relevant to metal sulphide chemistry.
- Characteristic solid form: Supplied as a solid powder, with appearance potentially influenced by purity and material condition.
- Reactive sulphide chemistry: Reacts with acids to release highly toxic hydrogen sulphide gas, requiring strict chemical compatibility controls.
- Precursor for barium compounds: Can serve as a starting material in established procedures for preparing selected barium salts.
- Specialised research relevance: May support selected inorganic chemistry and materials investigations when the method and safety requirements permit its use.
Laboratory Applications of Barium Sulphide
- Inorganic chemistry investigations: Used in selected studies of metal sulphides, ionic compounds, and their chemical reactivity.
- Preparation of barium salts: May serve as a starting material for synthesising other barium compounds through controlled laboratory procedures.
- Sulphide chemistry research: Relevant to specialised investigations of sulphide ions and reactions involving inorganic sulphur compounds.
- Materials science research: May be used in selected studies involving barium-containing materials and inorganic solid-state chemistry.
- Specialised reaction studies: Can support research into sulphide reactivity when specifically required by the method and performed with suitable containment, ventilation, and trained personnel.
Why Choose Lab Wale to Buy Barium Sulphide
Lab Wale provides a sourcing option for laboratory chemicals and scientific supplies used by colleges, universities, research centres, and laboratory professionals. When purchasing Barium Sulphide, review the chemical identity, stated LR Laboratory Reagent grade, pack size, and available technical and safety information to assess suitability for the intended procedure. Its ability to release highly toxic hydrogen sulphide gas on contact with acids makes proper storage, compatibility checks, and safe handling particularly important. The listed 500 g pack size can be considered when planning laboratory procurement and secure storage arrangements.
Frequently Asked Questions About Barium Sulphide
What is Barium Sulphide used for in laboratories?
Barium Sulphide is relevant to selected inorganic chemistry investigations and the preparation of other barium compounds. It may also be used in specialised research involving inorganic sulphides and materials chemistry. Its use requires suitable containment, trained personnel, and careful control of incompatible chemicals because contact with acids can release highly toxic hydrogen sulphide gas.
What are the molecular formula and molecular weight of Barium Sulphide?
The molecular formula of Barium Sulphide is BaS, and its formula mass is approximately 169.39 g/mol. Its empirical formula is also BaS because the barium-to-sulphur ratio is already the simplest whole-number ratio. These values refer to the anhydrous compound.
What is the CAS number of Barium Sulphide?
The CAS Registry Number commonly associated with Barium Sulphide is 21109-95-5. This identifier helps distinguish the compound from other barium salts and sulphur-containing materials during procurement, inventory management, and safety documentation review. Confirm the chemical identity against the available product information before use.
Why must Barium Sulphide be kept away from acids?
Barium Sulphide reacts with acids and can release hydrogen sulphide gas, which is highly toxic when inhaled. Contact with incompatible chemicals can therefore create a serious exposure hazard. Keep the material segregated from acids and follow the current Safety Data Sheet and institutional chemical compatibility procedures.
How should Barium Sulphide be stored and handled safely?
Store Barium Sulphide in a tightly closed, compatible, clearly labelled container in a dry, well-ventilated area. Protect it from moisture and keep it away from acids. Wear suitable gloves, protective clothing, and eye protection, minimise dust formation, and follow approved procedures for spill response and hazardous-waste disposal.
Storage Conditions for Barium Sulphide
Store Barium Sulphide in a tightly closed, compatible, clearly labelled container in a cool, dry, well-ventilated area. Protect it from moisture and contamination, and strictly segregate it from acids and other incompatible substances. Restrict access to trained personnel and follow the current Safety Data Sheet for specific storage requirements. Prevent accidental release of material or waste into drains and the environment.
Precautions for Handling Barium Sulphide
Review the current Safety Data Sheet before use. Wear suitable chemical-resistant gloves, protective clothing, and safety goggles, and avoid inhaling dust or allowing the material to contact skin and eyes. Use appropriate ventilation and prevent contact with acids, which can release highly toxic hydrogen sulphide gas. Avoid incompatible chemicals and follow institutional procedures for spill response, emergency management, and hazardous-waste disposal.


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