Sodium Thiosulfate
- CAS Number
- -
- HSN Code
- 38229090
- Molecular Formula
- Na2S2O3
- Catalogue Number
- AL1429E
- Purity
- 99.5% min
- Molecular Weight
- 248.17 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Sodium thiosulfate is a colorless crystalline compound that serves as a versatile reagent in various chemical applications. This specific product is a certified standardized 0.01M (0.01N) solution, ideal for precise dilute iodometric titrations. It is widely used in analytical chemistry for its reducing properties, particularly in the determination of halogens and other oxidizing agents. The solution is prepared with high purity standards to ensure accuracy in quantitative analysis, making it essential for laboratories engaged in chemical analysis and research.
Also known as Thiosulfuric acid sodium salt, Sodium thiosulphate.
- Catalogue No.
- AL1429E
- CAS Number
- -
- Molecular Formula
- Na2S2O3
- Molecular Weight
- 248.17 g/mol
- HSN Code
- 38229090
- Grade
- 0.01M (0.01N) Standardized Solution
- Product Form
- Mixture
The solution is a clear, colorless liquid with a density of approximately 1.02 g/mL. It has a boiling point of around 100 °C, and its freezing point is approximately 0 °C, typical for aqueous solutions. Sodium thiosulfate is highly soluble in water, with a solubility of about 70 g/100 mL at 20 °C. The solution has a pH value of approximately 7, indicating its neutral nature. It is non-volatile and does not have a distinct odor, making it suitable for laboratory environments.
- Appearance
- Clear, colorless liquid
- Shelf Life
- 12 months
- Packaging
- Available in 500 mL and 1 L bottles
- Storage
- Store in a cool, dry place away from direct sunlight.
1.1 — Product identifier
- Chemical Name
- Sodium Thiosulfate
- Catalogue No.
- AL1429E
- Product form
- Mixture
- CAS Number
- Not applicable
- EC Number
- 231-867-5
- Grade
- 0.01M (0.01N) Standardized Solution
- EC Index Number
- 016-020-00-8
- Chemical Formula
- Na2S2O3
- HSN Code
- 38229090
- Synonyms
- Thiosulfuric acid sodium salt, Sodium thiosulphate
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Used as a reducing agent in analytical chemistry and iodometric titrations.
- 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
- None known under normal conditions of use.
3.1 — Substance
- Name
- Sodium Thiosulfate
- CAS No.
- Not applicable
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
- May cause mild irritation to 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; however, may release toxic fumes 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
- 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. Clean up spills immediately to prevent slipping hazards.
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.
- 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.
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
- Not required under normal conditions of use.
9.1 — Information on basic physical and chemical properties
- Physical state
- Liquid
- Colour
- Colorless
- Odour
- Odourless
- Odour threshold
- Not applicable
- pH value
- 7
- Relative evaporation rate (butylacetate=1)
- Not applicable
- Melting point
- 0 °C
- Freezing point
- Not applicable
- Boiling point
- 100 °C
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- Not applicable
- Flammability (solid, gas)
- Not flammable
- Vapour pressure
- Not applicable
- Relative vapour density at 20°C
- Not applicable
- Density
- 1.02 g/mL
- Solubility
- Soluble in water
- 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 of use.
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 oxidizing agents.
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
- May cause mild 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 applicable
- UN-No. (IMDG)
- Not applicable
- UN-No. (IATA)
- Not applicable
- UN-No. (ADN)
- Not applicable
- UN-No. (RID)
- Not applicable
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
Sodium thiosulfate 0.01M (0.01N) is primarily used as a certified standardized dilute reducing titrant in iodometric volumetric analysis, which is crucial for determining the concentration of oxidizing agents in various samples. It is commonly employed in water treatment processes to dechlorinate water and in the photographic industry for fixing images. Additionally, it finds applications in the analysis of heavy metals and in the food industry for iodometric titrations. Its role in analytical chemistry extends to environmental testing and quality control in manufacturing processes.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL1429E
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 248.17 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | 99.5% min | 99.7% |
| pH | 7 ± 0.5 | 7.0 |
| Density | 1.02 g/mL | 1.02 g/mL |
| Moisture Content | < 0.5% | 0.3% |
| Residue on Ignition | < 0.1% | 0.05% |
| Related Substances | None detected | None detected |
The above product is expected to comply with 0.01M (0.01N) Standardized Solution grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 0.01M (0.01N) | 99.5% min | 0 °C / 100 °C | < 0.5% | < 0.1% | None detected | Completely soluble in water |
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