Sodium Dithionite
- CAS Number
- 7775-14-6
- HSN Code
- 28311010
- Molecular Formula
- Na2S2O4
- Catalogue Number
- AL4133
- Purity
- ≥ 85%
- Molecular Weight
- 174.11 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Sodium dithionite is an inorganic sodium salt that is the disodium salt of dithionous acid. It has a role as a bleaching agent and a reducing agent.
Also known as Sodium Hydrosulfite.
- Catalogue No.
- AL4133
- CAS Number
- 7775-14-6
- Molecular Formula
- Na2S2O4
- Molecular Weight
- 174.11 g/mol
- HSN Code
- 28311010
- Grade
- 85%
- Product Form
- Substance
Melting point: 52 °C (decomposes); Flash point: about 100 °C (open cup); Density: 2.38 g/cu cm; Solubility: Slightly sol in alcohol; very soluble in water.
- Appearance
- White or grayish-white crystalline powder
- Shelf Life
- 12 months
- Packaging
- Available in: 500 gm plastic bottle
- Storage
- Dry. Well closed. Separated from strong oxidants and acids. Store in an area without drain or sewer access.
1.1 — Product identifier
- Chemical Name
- Sodium Dithionite
- Catalogue No.
- AL4133
- Product form
- Substance
- CAS Number
- 7775-14-6
- EC Number
- 231-890-0
- Grade
- 85%
- EC Index Number
- 016-030-00-5
- Chemical Formula
- Na2S2O4
- HSN Code
- 28311010
- Synonyms
- Sodium Hydrosulfite
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Reducing agent in textile dyeing and analytical chemistry
- 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
2.1 — Classification of the substance or mixture
- Classification according to Regulation (EC) No 1272/2008
- Self-heat. 1; Acute Tox. 4
- Classification source
- ECHA C&L Inventory via PubChem CID 24489 - hazard classes notified by at least 50% of companies; pictograms and signal word derived from those statements
2.2 — Label elements
- Hazard pictograms
- Flammable, Irritant
- Signal word
- Danger
- Hazard statements
- H251: Self-heating; may catch fire; H302: Harmful if swallowed
2.3 — Other hazards
- Other hazards
- Spontaneously combustible when moist; may release toxic gases upon decomposition.
3.1 — Substance
- Name
- Sodium Dithionite
- CAS No.
- 7775-14-6
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 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 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 for chemical burns.
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 ignite spontaneously in moist conditions; use dry chemical, foam, or carbon dioxide extinguishers.
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 moisture and heat sources.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers. Carefully collect remainder.
6.4 — Reference to other sections
- Reference
- Not specified
7.1 — Precautions for safe handling
- Precautions for safe handling
- Avoid contact with moisture and heat. Use appropriate personal protective equipment (PPE).
- 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
- Dry. Well closed. Separated from strong oxidants and acids. Store in an area without drain or sewer access.
8.2 — Exposure controls
- Hand protection
- The selected protective gloves have to satisfy the specifications of EU Directive 89686EEC and the standard EN 374 derived from it. Handle with gloves.
- Eye protection
- Chemical safety goggles or safety glasses
- Skin and body protection
- Wear suitable protective clothing
- Respiratory protection
- Where risk assessment shows air-purifying respirators are appropriate use a dust mask type N95 (US) or type P1 (EN 143) respirator. Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).
9.1 — Information on basic physical and chemical properties
- Physical state
- Solid
- Colour
- White to pale gray
- Odour
- Faint sulfurous
- Odour threshold
- Not specified
- pH value
- Not applicable
- Relative evaporation rate (butylacetate=1)
- Not applicable
- Melting point
- 52 °C (decomposes)
- Freezing point
- Not applicable
- Boiling point
- 200°C (decomposes)
- Flash point
- about 100 °C (open cup)
- Auto-ignition temperature
- about 190 °C
- Decomposition temperature
- 190°C
- Flammability (solid, gas)
- Spontaneously combustible when moist
- Vapour pressure
- Not applicable
- Relative vapour density at 20°C
- Not applicable
- Density
- 2.38 g/cu cm
- Solubility
- Slightly sol in alcohol; very soluble in water
- Log Pow
- < -4.7
- Viscosity, kinematic
- Not applicable
- Viscosity, dynamic
- Not applicable
- Explosive properties
- Not applicable
- Oxidising properties
- Not applicable
- Explosive limits
- Not applicable
10.1 — Reactivity
- Reactivity
- Reacts with moisture and air, decomposing to release sulfur dioxide and other products.
10.2 — Chemical stability
- Chemical stability
- Avoid formation of dust and aerosols. Provide appropriate exhaust ventilation at places where dust is formed.
10.3 — Possibility of hazardous reactions
- Possibility of hazardous reactions
- Decomposes above 100 °C . This produces toxic fumes including sulfur oxides. The substance is a strong reducing agent. It reacts with oxidants.
10.4 — Conditions to avoid
- Conditions to avoid
- Avoid contact with incompatible materials and excessive heat.
10.5 — Incompatible materials
- Incompatible materials
- Strong oxidizers, acids, and moisture.
10.6 — Hazardous decomposition products
- Hazardous decomposition products
- Not specified
11.1 — Information on toxicological effects
- Acute toxicity
- LD50 Rat oral approx 2500 mg/kg bw; LD50 Mouse ip 900 mg/kg bw
- Skin corrosion/irritation
- Not classified (based on available data)
- Serious eye damage/irritation
- Not classified (based on available data)
- Respiratory or skin sensitisation
- Not classified (based on available data)
- Germ cell mutagenicity
- Not classified (based on available data)
- Carcinogenicity
- Not classified (based on available data)
- Specific target organ toxicity (single exposure)
- Not classified (based on available data)
- Specific target organ toxicity (repeated exposure)
- Not classified (based on available data)
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)
- UN 1384
- UN-No. (IMDG)
- UN 1384
- UN-No. (IATA)
- UN 1384
- UN-No. (ADN)
- UN 1384
- UN-No. (RID)
- UN 1384
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- Sodium Dithionite
- Proper Shipping Name (IMDG)
- Sodium Dithionite
- Proper Shipping Name (IATA)
- Sodium Dithionite
- Proper Shipping Name (ADN)
- Sodium Dithionite
- Proper Shipping Name (RID)
- Sodium Dithionite
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- 4.2
14.4 — Packing group
- Packing group (ADR)
- II
- Packing group (IMDG)
- II
- Packing group (IATA)
- II
- Packing group (ADN)
- II
- Packing group (RID)
- II
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 dithionite is extensively used in the textile industry as a reducing agent for vat dyeing processes, enabling the reduction of insoluble dyes to their soluble forms for application on fabrics. In addition to its role in textiles, it serves as an oxygen scavenger in various analytical chemistry applications, particularly in the preservation of samples and reagents sensitive to oxidation. Furthermore, sodium dithionite is employed in the food industry as a bleaching agent and in the paper industry for pulp bleaching. Its versatility makes it a valuable chemical in multiple sectors, including pharmaceuticals and environmental applications.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL01374
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 174.11 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | ≥ 85% | 87% |
| Moisture Content | ≤ 5% | 3.2% |
| Residue on Ignition | ≤ 1% | 0.5% |
| Related Substances | None detected | None detected |
| Solubility | 50 g/L in water at 20°C | 52 g/L in water at 20°C |
The above product is expected to comply with 85% grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 85% | ≥ 85% | m.p. 52 °C (decomposes) | ≤ 5% | ≤ 1% | None detected | Slightly sol in alcohol; very soluble in water |
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