Sodium Bisulfite
- CAS Number
- 7631-90-5
- HSN Code
- 28321010
- Molecular Formula
- NaHSO3
- Catalogue Number
- AL1357A
- 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 (NaHSO3) is an inorganic compound that serves as a versatile reducing agent and preservative. This AR-grade sodium bisulfite is characterized by its high purity, making it suitable for precise analytical applications. It is commonly used in various chemical processes, particularly in bisulfite-chemistry research, where accurate measurements and reactions are critical. The compound is notable for its ability to release sulfur dioxide (SO2) gas upon reaction, which is an important consideration in its handling and application.
Also known as Sodium hydrogen sulfite, Sodium bisulphite.
- Catalogue No.
- AL1357A
- CAS Number
- 7631-90-5
- Molecular Formula
- NaHSO3
- Molecular Weight
- 104.06 g/mol
- HSN Code
- 28321010
- Grade
- AR 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 (decomposes), and a boiling point of 315 °C (decomposes). The density of sodium bisulfite is about 1.48 g/cm³. It is soluble in water, with a solubility of approximately 70 g/L at 20 °C, and has a pH value of around 4.5 in a 1% solution. The compound is hygroscopic, meaning it can absorb moisture from the air, which can affect its stability and storage.
- Appearance
- White to pale yellow crystalline powder
- Shelf Life
- 2 years
- Packaging
- Available in 500 g and 1 kg plastic containers
- Storage
- Store in a cool, dry place, away from moisture and incompatible materials.
1.1 — Product identifier
- Chemical Name
- Sodium Bisulfite
- Catalogue No.
- AL1357A
- Product form
- Substance
- CAS Number
- 7631-90-5
- EC Number
- 231-548-0
- Grade
- AR grade
- EC Index Number
- 016-063-00-2
- Chemical Formula
- NaHSO3
- HSN Code
- 28321010
- Synonyms
- Sodium hydrogen sulfite, Sodium bisulphite
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Used as a reducing agent and preservative in various applications.
- 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. Continue rinsing. Seek medical attention if irritation persists.
- 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
- May emit toxic fumes of sulfur oxides 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 vapors. Use appropriate protective equipment.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Contain spill and collect using suitable absorbent material. 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 ventilation is inadequate.
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 (decomposes)
- Freezing point
- Not specified
- Boiling point
- 315 °C (decomposes)
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- Not specified
- Flammability (solid, gas)
- Not flammable
- 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, but 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 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)
- 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 widely used in the food and beverage industry as a preservative and antioxidant, particularly in wine and dried fruits to prevent oxidation. In the laboratory, it serves as an analytical-grade reducing agent in various chemical reactions, including the reduction of aldehydes and ketones. Additionally, it is utilized in the textile industry for bleaching and in the paper industry for pulp processing. Its ability to release sulfur dioxide makes it valuable in water treatment processes to remove chlorine and other oxidizing agents.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL1357A
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 104.06 g/mol
| Test | Standard | Observed |
|---|---|---|
| Description | White crystalline powder | White crystalline powder |
| Assay (Min. As SO2) | 58.5% | 58.8% |
| Arsenic (As) | <1ppm | <1ppm |
| Chloride (Cl) | <0.02% | 0.009% |
| Heavy metals (as Pb) | <0.001% | <0.001% |
| Insoluble matter | <0.005% | 0.004% |
| Iron (Fe) | <0.002% | 0.001% |
The above product complies with AR grade
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| AR grade | ≥ 98% | 150 °C (decomposes) | ≤ 1% | ≤ 0.5% | None detected | 70 g/L in water at 20 °C |
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.
