Potassium Sulfide
- CAS Number
- 1312-73-8
- HSN Code
- 28309010
- Molecular Formula
- K2S
- Catalogue Number
- AL01265
- Purity
- ≥ 98%
- Molecular Weight
- 110.62 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Potassium sulfide (K2S) is a highly reactive alkali metal sulfide known for its ability to release hydrogen sulfide (H2S) upon contact with water or acids. This compound is notable for its use as a reference compound in various chemical analyses and reactions. With a purity of 98%, it is suitable for laboratory and industrial applications where high-quality reagents are required. Potassium sulfide is classified as a hazardous material due to its spontaneous combustibility and the toxic nature of the gases it can release, necessitating careful handling and storage procedures.
Also known as Potassium sulfide, K2S.
- Catalogue No.
- AL01265
- CAS Number
- 1312-73-8
- Molecular Formula
- K2S
- Molecular Weight
- 110.62 g/mol
- HSN Code
- 28309010
- Grade
- 98%
- Product Form
- Substance
Potassium sulfide appears as a yellow to red crystalline solid that is hygroscopic in nature, meaning it can absorb moisture from the air. It has a melting point of approximately 840 °C and a boiling point of around 1,500 °C. The density of potassium sulfide is about 1.67 g/cm³. It is soluble in water, where it dissociates to release sulfide ions and hydrogen sulfide gas. The compound is also known to react vigorously with acids, producing H2S, which has a characteristic rotten egg odor.
- Appearance
- Yellow to red crystalline solid
- Shelf Life
- 2 years
- Packaging
- 25 kg bags
- Storage
- Store in a cool, dry place, away from moisture and acids.
1.1 — Product identifier
- Chemical Name
- Potassium Sulfide
- Catalogue No.
- AL01265
- Product form
- Substance
- CAS Number
- 1312-73-8
- EC Number
- 215-195-4
- Grade
- 98%
- EC Index Number
- 016-096-00-4
- Chemical Formula
- K2S
- HSN Code
- 28309010
- Synonyms
- Potassium sulfide, K2S
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Used as a sulfide-ion source and reference compound in chemical research.
- Uses advised against
- Not specified
1.3 — Details of the supplier of the safety data sheet
- Company identification
- Address:- 102, B wing, Savgan Heights, RTO Lane,Andheri (W), Mumbai-400 053Maharashtra, India.
1.4 — Emergency Contact Details
- Phone / e-Mail
- Phone : +91 22 26317055 Mobile : +91 9820385757 e-mail : info@alphachemika.co.in
2.3 — Other hazards
- Other hazards
- Spontaneously combustible; releases toxic hydrogen sulfide gas upon contact with moisture or acids.
3.1 — Substance
- Name
- Potassium Sulfide
- CAS No.
- 1312-73-8
4.1 — Description of first aid measures
- First-aid measures after inhalation
- Move to fresh air. If symptoms persist, seek medical attention.
- First-aid measures after skin contact
- Wash with plenty of soap and water. Seek medical attention if irritation develops.
- First-aid measures after eye contact
- Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing and seek medical attention.
- First-aid measures after ingestion
- Do not induce vomiting. Rinse mouth and seek medical attention immediately.
4.2 — Most important symptoms and effects, both acute and delayed
- Symptoms relating to use
- Symptoms of exposure may include irritation of the respiratory tract, skin, and eyes, as well as headache and nausea due to H2S exposure.
4.3 — Indication of any immediate medical attention and special treatment needed
- General information
- Treat symptomatically. Show this safety data sheet to the treating physician.
5.1 — Extinguishing media
- Suitable extinguishing media
- Water spray, carbon dioxide, dry chemical powder, foam.
- Unsuitable extinguishing media
- Not specified
5.2 — Special hazards arising from the substance or mixture
- Special procedures
- May ignite spontaneously in air; use appropriate fire extinguishing media.
5.3 — Advice for firefighters
- Protection during firefighting
- Do not enter fire area without proper protective equipment, including respiratory protection.
6.1.1 — For non-emergency personnel
- Emergency procedures
- Evacuate area and ventilate. Contain and collect spillage with inert material.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Use appropriate protective equipment. Dispose of in accordance with local regulations.
6.4 — Reference to other sections
- Reference
- Not specified
7.1 — Precautions for safe handling
- Precautions for safe handling
- Handle under inert gas. Use in a fume hood with appropriate PPE including gloves and goggles.
- Hygiene measures
- Wash hands and other exposed areas with mild soap and water before eating, drinking or smoking and when leaving work.
7.2 — Conditions for safe storage, including any incompatibilities
- Storage conditions
- Store in tightly closed containers in a cool, dry place, away from moisture and acids.
8.2 — Exposure controls
- Hand protection
- Protective gloves (e.g. nitrile rubber)
- Eye protection
- Chemical safety goggles or safety glasses
- Skin and body protection
- Wear suitable protective clothing
- Respiratory protection
- Use appropriate respiratory protection when handling this material.
9.1 — Information on basic physical and chemical properties
- Physical state
- Solid
- Colour
- Yellow to red
- Odour
- Odourless (H2S is released upon reaction with moisture)
- Odour threshold
- Not applicable
- pH value
- Not applicable
- Relative evaporation rate (butylacetate=1)
- Not applicable
- Melting point
- 840 °C
- Freezing point
- Not applicable
- Boiling point
- 1500 °C
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- Not applicable
- Flammability (solid, gas)
- Spontaneously combustible
- Vapour pressure
- Not applicable
- Relative vapour density at 20°C
- Not applicable
- Density
- 1.67 g/cm³
- Solubility
- Soluble in water
- Log Pow
- Not applicable
- Viscosity, kinematic
- Not applicable
- Viscosity, dynamic
- Not applicable
- Explosive properties
- Not applicable
- Oxidising properties
- Not applicable
- Explosive limits
- Not applicable
10.1 — Reactivity
- Reactivity
- Reacts with water and acids to release hydrogen sulfide gas.
10.2 — Chemical stability
- Chemical stability
- Stable under recommended storage conditions.
10.3 — Possibility of hazardous reactions
- Possibility of hazardous reactions
- No dangerous reactions known under normal conditions of use.
10.4 — Conditions to avoid
- Conditions to avoid
- Avoid contact with incompatible materials and excessive heat.
10.5 — Incompatible materials
- Incompatible materials
- Strong acids, oxidizing agents, moisture.
10.6 — Hazardous decomposition products
- Hazardous decomposition products
- Not specified
11.1 — Information on toxicological effects
- Acute toxicity
- Toxic if inhaled or ingested; may cause respiratory irritation.
- Skin corrosion/irritation
- Causes skin irritation.
- Serious eye damage/irritation
- Causes serious eye irritation.
- Respiratory or skin sensitisation
- Not a skin sensitizer.
- Germ cell mutagenicity
- Not classified
- Carcinogenicity
- Not classified
- Specific target organ toxicity (single exposure)
- May cause respiratory irritation.
- Specific target organ toxicity (repeated exposure)
- Not classified
12.1 — Toxicity
- Toxicity information
- Not specified
12.2 — Persistence - degradability
- Persistence - degradability
- Not specified
12.3 — Bioaccumulative potential
- Bioaccumulative potential
- Not specified
12.4 — Mobility in soil
- Mobility in soil
- Not specified
12.6 — Other adverse effects
- Environmental precautions
- Not specified
13.1 — Waste treatment methods
- Additional Info
- Dispose of contents/container in accordance with local, regional, national and international regulations.
14.1 — UN number
- UN-No. (ADR)
- 1382
- UN-No. (IMDG)
- 1382
- UN-No. (IATA)
- 1382
- UN-No. (ADN)
- 1382
- UN-No. (RID)
- 1382
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- Potassium sulfide
- Proper Shipping Name (IMDG)
- Potassium sulfide
- Proper Shipping Name (IATA)
- Potassium sulfide
- Proper Shipping Name (ADN)
- Potassium sulfide
- Proper Shipping Name (RID)
- Potassium sulfide
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- 4.2
14.4 — Packing group
- Packing group (ADR)
- II
- Packing group (IMDG)
- II
- Packing group (IATA)
- II
- Packing group (ADN)
- II
- Packing group (RID)
- II
14.5 — Environmental hazards
- Dangerous for the environment
- Not specified
- Marine pollutant
- Not specified
- Other information
- No supplementary information available
15.1 — Safety, health and environmental regulations/legislation specific for the substance or mixture
- 15.1.1 EU-Regulations
- Not specified
Potassium sulfide is widely used in classical qualitative inorganic chemistry as a source of sulfide ions, which are essential for various precipitation reactions and qualitative analysis. It serves as a reference compound in sulfide chemistry research, particularly in studies involving metal sulfides and their properties. Additionally, potassium sulfide is utilized in the production of other chemicals, in the leather industry for dehairing hides, and in the manufacturing of certain types of glass and ceramics.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL01265
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 110.62 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | ≥ 98% | 99.5% |
| Moisture Content | ≤ 0.5% | 0.3% |
| Residue on Ignition | ≤ 1% | 0.5% |
| Related Substances | None detected | None detected |
| Solubility | Soluble in water | Soluble |
The above product is expected to comply with 98% grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 98% | ≥ 98% | Melting point: 840 °C | ≤ 0.5% | ≤ 1% | None detected | Soluble in water |
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