Potassium bisulfate
- CAS Number
- 7646-93-7
- HSN Code
- 28332990
- Molecular Formula
- KHSO4
- Catalogue Number
- AL01225
- Purity
- ≥ 98.5%
- Molecular Weight
- 136.19 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Potassium bisulfate, also known as potassium hydrogen sulfate, is an acidic potassium salt with the molecular formula KHSO4 and a molecular weight of 136.19 g/mol. It is a white crystalline powder that is highly soluble in water, making it an effective reagent in various chemical applications. This compound is notable for its use as a fusion flux in analytical chemistry, particularly in the dissolution of refractory mineral samples. With a purity of 98.5%, it meets high standards for laboratory use and is classified under CAS No. 7646-93-7.
Also known as Potassium hydrogen sulfate.
- Catalogue No.
- AL01225
- CAS Number
- 7646-93-7
- Molecular Formula
- KHSO4
- Molecular Weight
- 136.19 g/mol
- HSN Code
- 28332990
- Grade
- 98.5%
- Product Form
- Substance
Potassium bisulfate appears as a white crystalline powder. It has a melting point of approximately 135 °C and a boiling point of around 340 °C. The compound is highly soluble in water, with a solubility of about 1,000 g/L at 20 °C. It has a density of approximately 2.66 g/cm³. The compound is hygroscopic, meaning it can absorb moisture from the air, which can affect its handling and storage.
- Appearance
- White crystalline powder
- Shelf Life
- 2 years
- Packaging
- 25 kg bags
- Storage
- Store in a cool, dry place, away from incompatible materials.
1.1 — Product identifier
- Chemical Name
- Potassium bisulfate
- Catalogue No.
- AL01225
- Product form
- Substance
- CAS Number
- 7646-93-7
- EC Number
- 231-915-5
- Grade
- 98.5%
- EC Index Number
- 650-002-00-3
- Chemical Formula
- KHSO4
- HSN Code
- 28332990
- Synonyms
- Potassium hydrogen sulfate
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Analytical reagent, fusion flux
- 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
- Corrosive to metals
3.1 — Substance
- Name
- Potassium bisulfate
- CAS No.
- 7646-93-7
4.1 — Description of first aid measures
- First-aid measures after inhalation
- Move to fresh air. Seek medical attention if symptoms persist.
- 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. Seek medical attention.
- First-aid measures after ingestion
- Rinse mouth. Do NOT induce vomiting. Seek medical attention.
4.2 — Most important symptoms and effects, both acute and delayed
- Symptoms relating to use
- Irritation of the respiratory tract, skin, and eyes; possible burns.
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
- Non-flammable, but may release toxic fumes when heated.
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
- Contain spill and absorb with inert material. Dispose of in accordance with local regulations.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Use appropriate protective equipment. Sweep up and place in a suitable container for disposal.
6.4 — Reference to other sections
- Reference
- Not specified
7.1 — Precautions for safe handling
- Precautions for safe handling
- Wear protective gloves and eye protection. Avoid contact with skin and eyes.
- 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 a cool, dry place, away from incompatible materials such as strong bases and oxidizers.
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 if dust is generated.
9.1 — Information on basic physical and chemical properties
- Physical state
- Solid
- Colour
- White
- Odour
- Odourless
- Odour threshold
- Not applicable
- pH value
- Acidic (approx. 1.5 in 1% solution)
- Relative evaporation rate (butylacetate=1)
- Not applicable
- Melting point
- 135 °C
- Freezing point
- Not applicable
- Boiling point
- 340 °C
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- Decomposes above 340 °C
- Flammability (solid, gas)
- Not flammable
- Vapour pressure
- Negligible
- Relative vapour density at 20°C
- Not applicable
- Density
- 2.66 g/cm³
- Solubility
- Soluble in water (1,000 g/L at 20 °C)
- Log Pow
- Not applicable
- Viscosity, kinematic
- Not applicable
- Viscosity, dynamic
- Not applicable
- Explosive properties
- Not explosive
- Oxidising properties
- Not oxidizing
- Explosive limits
- Not applicable
10.1 — Reactivity
- Reactivity
- Stable under normal conditions. Reacts with strong bases and oxidizing agents.
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 bases, strong oxidizers, and moisture.
10.6 — Hazardous decomposition products
- Hazardous decomposition products
- Not specified
11.1 — Information on toxicological effects
- Acute toxicity
- Low toxicity; LD50 (oral, rat) > 2000 mg/kg.
- Skin corrosion/irritation
- Causes skin irritation.
- Serious eye damage/irritation
- Causes serious eye damage.
- 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)
- 2509
- UN-No. (IMDG)
- 2509
- UN-No. (IATA)
- 2509
- UN-No. (ADN)
- 2509
- UN-No. (RID)
- 2509
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- Potassium bisulfate
- Proper Shipping Name (IMDG)
- Potassium bisulfate
- Proper Shipping Name (IATA)
- Potassium bisulfate
- Proper Shipping Name (ADN)
- Potassium bisulfate
- Proper Shipping Name (RID)
- Potassium bisulfate
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- 8
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 bisulfate is widely used in analytical chemistry as a fusion flux, particularly for dissolving refractory mineral samples in classical qualitative analysis. It is also utilized in the production of potassium sulfate, which is an important fertilizer in agriculture. Additionally, it serves as a pH regulator in various industrial processes and is used in the food industry as a food additive. Its properties make it suitable for applications in the manufacture of glass and ceramics, as well as in the preparation of certain pharmaceuticals.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL01225
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 136.19 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | ≥ 98.5% | 99.0% |
| Moisture Content | ≤ 0.5% | 0.3% |
| Residue on Ignition | ≤ 0.5% | 0.2% |
| pH Value | Acidic (approx. 1.5 in 1% solution) | 1.4 |
| Solubility | Soluble in water | Complete dissolution in water at 20 °C |
The above product is expected to comply with 98.5% grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 98.5% | ≥ 98.5% | 135 °C | ≤ 0.5% | ≤ 0.5% | None detected | Soluble in water |
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