Potassium Metabisulfite
- CAS Number
- 16731-55-8
- HSN Code
- 28322010
- Molecular Formula
- K2S2O5
- Catalogue Number
- AL1251A
- Purity
- 96%
- Molecular Weight
- 222.31 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Potassium metabisulfite (K2S2O5) is a white crystalline powder that serves as a versatile reagent in various analytical applications. This AR-grade product is characterized by its high purity of 96%, making it suitable for precise analytical use in laboratories. It is commonly utilized in food preservation due to its antioxidant properties and is also employed in reducing-agent research. The compound is notable for its ability to release sulfur dioxide (SO2) gas, which is a key factor in its applications as a preservative and antioxidant.
Also known as Potassium disulfite, E224.
- Catalogue No.
- AL1251A
- CAS Number
- 16731-55-8
- Molecular Formula
- K2S2O5
- Molecular Weight
- 222.31 g/mol
- HSN Code
- 28322010
- Grade
- AR (Analytical Reagent)
- Product Form
- Substance
Potassium metabisulfite appears as a white crystalline powder with a pungent sulfurous odor. It has a melting point of approximately 150 °C, and it decomposes upon heating, releasing sulfur dioxide. The compound is soluble in water, with a solubility of about 10 g/100 mL at 20 °C. Its density is approximately 1.48 g/cm³. The compound has a boiling point of 190 °C, at which it begins to decompose. The pH of a 1% solution is around 4.5, indicating its acidic nature.
- Appearance
- White crystalline powder
- Shelf Life
- 2 years
- Packaging
- Available in 500 g and 1 kg polyethylene bags
- Storage
- Store in a cool, dry place, away from moisture and incompatible materials.
1.1 — Product identifier
- Chemical Name
- Potassium Metabisulfite
- Catalogue No.
- AL1251A
- Product form
- Substance
- CAS Number
- 16731-55-8
- EC Number
- 240-440-2
- Grade
- AR
- EC Index Number
- 016-096-00-2
- Chemical Formula
- K2S2O5
- HSN Code
- 28322010
- Synonyms
- Potassium disulfite, E224
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Analytical reagent, food preservative, antioxidant
- 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
- Releases irritating sulfur dioxide gas upon decomposition.
3.1 — Substance
- Name
- Potassium Metabisulfite
- CAS No.
- 16731-55-8
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 soap and water. If irritation occurs, seek medical attention.
- First-aid measures after eye contact
- Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. If irritation persists, seek medical attention.
- First-aid measures after ingestion
- Rinse mouth. Do not induce vomiting. Seek medical attention if symptoms occur.
4.2 — Most important symptoms and effects, both acute and delayed
- Symptoms relating to use
- Irritation of the respiratory tract, skin, and eyes.
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 sulfur dioxide 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
- Evacuate area and ventilate. Avoid breathing dust. Use appropriate protective equipment.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Collect and dispose of in accordance with local regulations. Avoid release into the environment.
6.4 — Reference to other sections
- Reference
- Not specified
7.1 — Precautions for safe handling
- Precautions for safe handling
- Use in a well-ventilated area. Avoid contact with skin and eyes. Wear appropriate personal protective equipment.
- 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 acids and bases.
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
- Pungent sulfurous
- Odour threshold
- Not specified
- pH value
- 4.5 (1% solution)
- Relative evaporation rate (butylacetate=1)
- Not specified
- Melting point
- 150 °C (decomposes)
- Freezing point
- Not specified
- Boiling point
- 190 °C (decomposes)
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- Decomposes above 150 °C
- Flammability (solid, gas)
- Non-flammable
- Vapour pressure
- Not specified
- Relative vapour density at 20°C
- Not specified
- Density
- 1.48 g/cm³
- Solubility
- 10 g/100 mL (20 °C)
- Log Pow
- Not specified
- 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, but decomposes upon heating.
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, strong bases, and oxidizing agents.
10.6 — Hazardous decomposition products
- Hazardous decomposition products
- Not specified
11.1 — Information on toxicological effects
- Acute toxicity
- Low toxicity; may cause irritation.
- Skin corrosion/irritation
- May cause skin irritation.
- Serious eye damage/irritation
- Causes serious eye irritation.
- Respiratory or skin sensitisation
- Not a sensitizer.
- Germ cell mutagenicity
- Not classified
- Carcinogenicity
- Not classified
- Specific target organ toxicity (single exposure)
- Not classified as a specific target organ toxicant.
- 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)
- Not assigned
- UN-No. (IMDG)
- Not assigned
- UN-No. (IATA)
- Not assigned
- UN-No. (ADN)
- Not assigned
- UN-No. (RID)
- Not assigned
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- Not classified as dangerous goods
- Proper Shipping Name (IMDG)
- Not classified as dangerous goods
- Proper Shipping Name (IATA)
- Not classified as dangerous goods
- Proper Shipping Name (ADN)
- Not classified as dangerous goods
- Proper Shipping Name (RID)
- Not classified as dangerous goods
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- Not applicable
14.4 — Packing group
- Packing group (ADR)
- Not applicable
- Packing group (IMDG)
- Not applicable
- Packing group (IATA)
- Not applicable
- Packing group (ADN)
- Not applicable
- Packing group (RID)
- Not applicable
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 metabisulfite is widely used in the food and beverage industry as a preservative and antioxidant, particularly in wine and dried fruit production. It acts as a reducing agent in various chemical reactions and is also utilized in the photographic industry for developing films. In analytical chemistry, it serves as a reagent for the determination of various compounds, including heavy metals. Additionally, it is employed in the textile industry for bleaching and in the production of certain pharmaceuticals.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL1251A
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 222.31 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | 96% min | 96.5% |
| Moisture Content | <1% | 0.5% |
| Residue on Ignition | <0.5% | 0.3% |
| Related Substances | None detected | None detected |
| Solubility | Soluble in water | Soluble |
The above product is expected to comply with AR grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| AR | 96% | 150 °C (decomposes) | <1% | <0.5% | None detected | Soluble in water |
Related Products
View AllWhy buy from Alpha Chemika
What Our Scientific & Industrial Customers Say
“Speedy delivery, professional staff.”
“One shop stop for all laboratory chemicals requirements.”
“Exactly as advertised.”
“Alpha Chemika products are of excellent quality. Highly satisfied.”
“From ordering to shipping, every course of action was smooth. Timely delivery.”
“Completely satisfied with the products and services.”
“Speedy delivery, professional staff.”
“One shop stop for all laboratory chemicals requirements.”
“Exactly as advertised.”
“One shop stop for all laboratory chemicals requirements.”
“Exactly as advertised.”
“Alpha Chemika products are of excellent quality. Highly satisfied.”
“Exactly as advertised.”
“Alpha Chemika products are of excellent quality. Highly satisfied.”
“From ordering to shipping, every course of action was smooth. Timely delivery.”
“Alpha Chemika products are of excellent quality. Highly satisfied.”
“From ordering to shipping, every course of action was smooth. Timely delivery.”
“Completely satisfied with the products and services.”
“From ordering to shipping, every course of action was smooth. Timely delivery.”
“Completely satisfied with the products and services.”
“Speedy delivery, professional staff.”
“Completely satisfied with the products and services.”
“Speedy delivery, professional staff.”
“One shop stop for all laboratory chemicals requirements.”
FAQs
Common Questions About Laboratory Chemicals & Solutions
Find answers to common questions about laboratory chemicals, product selection, documentation, ordering, and technical support. Whether you are sourcing chemicals for research, testing, education, manufacturing, or industrial applications, these FAQs can help you make informed purchasing decisions.
Alpha Chemika offers a wide range of laboratory chemicals, reagents, solvents, and specialty products for research, testing, educational, pharmaceutical, and industrial applications.
Product selection depends on factors such as application, required purity, grade, specifications, and intended use. Our team can help you identify suitable products based on your technical requirements.
Yes. Relevant product information and technical documentation can be provided to help you evaluate products for quality, handling, compliance, and application requirements.
Yes. You can share your product list, required quantities, specifications, and delivery requirements with our team for a tailored quotation.
Yes. We support requirements from research laboratories, educational institutions, pharmaceutical companies, manufacturers, distributors, and other scientific and industrial organizations.
Connect with Us for Your Requirements
Have a specific product requirement or need help finding the right chemical for your application? Share your requirements with our team, and we will help you identify suitable products, specifications, quantities, and procurement options.
