Sodium Bisulfite
- CAS Number
- 7631-90-5
- HSN Code
- 28321010
- Molecular Formula
- NaHSO3
- Catalogue Number
- AL01357
- Purity
- ≥ 98%
- Molecular Weight
- 104.06 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Sodium bisulfite, also known as sodium acid sulfite, is an inorganic compound with the formula NaHSO3. It is a white to pale yellow crystalline powder that serves as a versatile reducing agent and is widely utilized in various applications, particularly in the food industry as a preservative. This compound is notable for its ability to release sulfur dioxide (SO2) gas upon reaction, which contributes to its preservative properties. Sodium bisulfite is also employed in analytical chemistry as a reference compound, making it an essential reagent in various laboratory settings.
Also known as Sodium acid sulfite.
- Catalogue No.
- AL01357
- CAS Number
- 7631-90-5
- Molecular Formula
- NaHSO3
- Molecular Weight
- 104.06 g/mol
- HSN Code
- 28321010
- Grade
- Standard grade
- Product Form
- Substance
Sodium bisulfite appears as a white to pale yellow crystalline powder with a pungent sulfurous odor. It has a melting point of approximately 150 °C (302 °F) and is highly soluble in water, with a solubility of about 70 g/L at 20 °C. The density of sodium bisulfite is approximately 1.48 g/cm³. It has a pH value of around 4.5 in a 1% aqueous solution, indicating its acidic nature. The compound is hygroscopic, meaning it can absorb moisture from the air, which can affect its stability and handling.
- Appearance
- White to pale yellow crystalline powder
- Shelf Life
- 2 years
- Packaging
- 25 kg bags
- Storage
- Store in a cool, dry place away from moisture and incompatible materials.
1.1 — Product identifier
- Chemical Name
- Sodium Bisulfite
- Catalogue No.
- AL01357
- Product form
- Substance
- CAS Number
- 7631-90-5
- EC Number
- 231-548-0
- Grade
- Standard grade
- EC Index Number
- 016-063-00-2
- Chemical Formula
- NaHSO3
- HSN Code
- 28321010
- Synonyms
- Sodium acid sulfite
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Reducing agent, food preservative, reference compound
- 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
- Sodium Bisulfite
- CAS No.
- 7631-90-5
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. 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; potential allergic reactions.
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 emit sulfur dioxide gas when heated or involved in a fire.
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
- Contain spill and collect using appropriate methods. 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
- Avoid contact with skin and eyes. Use in a well-ventilated area. 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 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 or mist is generated.
9.1 — Information on basic physical and chemical properties
- Physical state
- Solid
- Colour
- White to pale yellow
- Odour
- Pungent sulfurous
- Odour threshold
- Not specified
- pH value
- 4.5 (1% solution)
- Relative evaporation rate (butylacetate=1)
- Not specified
- Melting point
- 150 °C (302 °F)
- Freezing point
- Not specified
- Boiling point
- Not specified
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- Not specified
- Flammability (solid, gas)
- Not flammable under normal conditions
- Vapour pressure
- Not specified
- Relative vapour density at 20°C
- Not specified
- Density
- 1.48 g/cm³
- Solubility
- 70 g/L in water at 20 °C
- Log Pow
- Not specified
- Viscosity, kinematic
- Not applicable
- Viscosity, dynamic
- Not specified
- Explosive properties
- Not explosive
- Oxidising properties
- Not oxidizing
- Explosive limits
- Not applicable
10.1 — Reactivity
- Reactivity
- Stable under normal conditions; may react with strong acids 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 acids, 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
- May cause mild 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)
- 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)
- Sodium bisulfite
- Proper Shipping Name (IMDG)
- Sodium bisulfite
- Proper Shipping Name (IATA)
- Sodium bisulfite
- Proper Shipping Name (ADN)
- Sodium bisulfite
- Proper Shipping Name (RID)
- Sodium bisulfite
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- Not classified as hazardous for transport
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
Sodium bisulfite is primarily used as a reducing agent in various chemical processes, including the preservation of food and beverages, where it helps to prevent oxidation and spoilage. In the food industry, it is commonly used in dried fruits, wines, and other products to maintain color and freshness. Additionally, sodium bisulfite is utilized in analytical chemistry as a reference compound for various assays and tests, particularly in the determination of sulfite levels in food and beverages. It also finds applications in the textile and paper industries, where it is used in bleaching processes and as a reducing agent in dyeing.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL01357
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 104.06 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | ≥ 98% | 99.5% |
| Moisture content | ≤ 1% | 0.5% |
| Residue on ignition | ≤ 0.5% | 0.2% |
| Related substances | None detected | None detected |
| Solubility | 70 g/L in water | 72 g/L in water |
The above product is expected to comply with Standard grade grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| Standard grade | ≥ 98% | 150 °C | ≤ 1% | ≤ 0.5% | None detected | 70 g/L in water |
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