Sodium Pyrosulfate
- CAS Number
- 13870-29-6
- HSN Code
- 28331920
- Molecular Formula
- Na2S2O7
- Catalogue Number
- AL02528
- Purity
- 98%
- Molecular Weight
- 222.12 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Sodium pyrosulfate (AR, disulfuric acid disodium salt) is an acidic fusion-flux salt that plays a crucial role in analytical chemistry, particularly in the dissolution of refractory mineral samples. This compound is notable for its high purity of 98%, making it suitable for laboratory applications where precision is essential. With a molecular formula of Na2S2O7 and a molecular weight of 222.12 g/mol, sodium pyrosulfate is recognized for its effectiveness in various chemical processes. Its ability to act as a strong dehydrating agent further enhances its utility in analytical procedures.
Also known as Disulfuric acid disodium salt.
- Catalogue No.
- AL02528
- CAS Number
- 13870-29-6
- Molecular Formula
- Na2S2O7
- Molecular Weight
- 222.12 g/mol
- HSN Code
- 28331920
- Grade
- AR (Analytical Reagent)
- Product Form
- Substance
Sodium pyrosulfate appears as a white crystalline solid, characterized by its high solubility in water, which facilitates its use in various aqueous applications. The melting point of sodium pyrosulfate is approximately 300 °C, and it decomposes upon heating, releasing sulfur oxides. The density of this compound is around 2.66 g/cm³, and it has a pH value of approximately 1 in solution, indicating its acidic nature. Its hygroscopic properties allow it to absorb moisture from the air, which should be considered during storage.
- Appearance
- White crystalline solid
- Shelf Life
- -
- Packaging
- -
- Storage
- Store in a cool, dry place, away from moisture and incompatible materials.
1.1 — Product identifier
- Chemical Name
- Sodium Pyrosulfate
- Catalogue No.
- AL02528
- Product form
- Substance
- CAS Number
- 13870-29-6
- EC Number
- 237-197-4
- Grade
- AR
- EC Index Number
- Not specified
- Chemical Formula
- Na2S2O7
- HSN Code
- 28331920
- Synonyms
- Disulfuric acid disodium salt
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Used as a fusion flux in analytical chemistry and mineral analysis.
- 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 skin and eyes; may cause respiratory irritation.
3.1 — Substance
- Name
- Sodium Pyrosulfate
- CAS No.
- 13870-29-6
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
- Rinse mouth. Do not induce vomiting. Seek medical attention immediately.
4.2 — Most important symptoms and effects, both acute and delayed
- Symptoms relating to use
- Irritation of the respiratory tract, skin, and eyes; potential corrosive effects.
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 collect using appropriate protective equipment. Dispose of in accordance with local regulations.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Use appropriate personal 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
- Avoid contact with skin and eyes. Use appropriate personal protective equipment and work in a well-ventilated area.
- 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 tightly closed container in a cool, dry place, away from incompatible materials.
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
- 1 (in solution)
- Relative evaporation rate (butylacetate=1)
- Not applicable
- Melting point
- 300 °C (decomposes)
- Freezing point
- Not applicable
- Boiling point
- Not applicable
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- Decomposes above 300 °C
- Flammability (solid, gas)
- Non-flammable
- Vapour pressure
- Not applicable
- Relative vapour density at 20°C
- Not applicable
- Density
- 2.66 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
- Stable under normal conditions; reacts with strong bases and reducing 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, reducing agents, and moisture.
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
- 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)
- 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 Pyrosulfate
- Proper Shipping Name (IMDG)
- Sodium Pyrosulfate
- Proper Shipping Name (IATA)
- Sodium Pyrosulfate
- Proper Shipping Name (ADN)
- Sodium Pyrosulfate
- Proper Shipping Name (RID)
- Sodium Pyrosulfate
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 pyrosulfate is primarily used as a fusion flux in the dissolution of refractory mineral and ore samples, making it invaluable in classical qualitative and gravimetric analysis. It is widely utilized in laboratories for the preparation of samples prior to spectroscopic analysis, as well as in the metallurgical industry for the analysis of metal ores. Additionally, its properties as a dehydrating agent make it useful in various chemical syntheses and reactions where water removal is necessary. The compound is also employed in the production of other sulfur-containing chemicals, further extending its applications in industrial processes.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL02528
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 222.12 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | 98% min | 98.5% |
| Moisture Content | <0.5% | 0.3% |
| Residue on Ignition | <1% | 0.5% |
| Related Substances | None detected | None detected |
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 | 98% | 300 °C (decomposes) | <0.5% | <1% | None detected | Soluble in water |
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