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Product Name: Sodium Hyposulfite
Common Synonyms: Sodium thiosulfate, Hypo
Chemical Formula: Na2S2O3·5H2O
Recommended Uses: Photographic fixer, medical antidote, water treatment, industrial dechlorination
Manufacturer Contact: Include address, emergency phone number, and business hours info
Product Code: Specific to supplier or batch for traceability
Hazard Class: Not classified as hazardous under GHS, but caution still advised
Label Elements: No specific pictograms, precautionary statements required for safe handling
Signal Word: None assigned
Potential Health Effects: Eye and skin irritation on direct contact, nausea or upset stomach if ingested in large amounts, may worsen asthma symptoms if inhaled as dust
Environmental Hazards: Large spills may contribute to aquatic oxygen demand, stressing waterways
Principal Component: Sodium Hyposulfite Pentahydrate
CAS Number: 10102-17-7
Concentration: Ranges up to 100% in technical grade products
Impurities: May contain trace sodium sulfate, sodium sulfite, or water-insoluble materials depending on manufacturer
Exposure - Eyes: Rinse immediately with plenty of water, keep eyelids apart, seek medical advice if irritation remains
Exposure - Skin: Wash thoroughly with water and mild soap, remove contaminated clothing
Inhalation: Move individual to fresh air, monitor for symptoms, allow rest
Ingestion: Rinse mouth, drink water if conscious; do not induce vomiting, consult medical professional
Medical Attention: Seek prompt care for persistent symptoms or large accidental doses
Suitable Extinguishing Media: Use water spray, dry foam, or CO2; the compound itself does not burn easily
Hazards From Combustion: Sulfur oxides and sodium oxides may form if heated extremely
Personal Protection: Standard firefighting gear with self-contained breathing apparatus
Precautionary Actions: Cool exposed containers with water, avoid inhalation of any fumes
Personal Precautions: Wear gloves, goggles, dust mask in areas with fine powder
Environmental Protection: Prevent releases into drains, surface water, or soil; large quantities can lower oxygen in water bodies
Clean-Up Methods: Sweep up solid, collect in a clean, dry container, flush residual material with copious water; ventilate work area
Handling: Avoid generating dust, wear appropriate PPE, prevent contact with acids or strong oxidants
Storage Requirements: Store sealed in a cool, dry, well-ventilated room away from sunlight and sources of moisture
Storage Container: Use chemically compatible plastic or glass; avoid contact with metals if possible
Special Measures: Protect from long-term exposure to air to reduce caking and loss of product potency
Engineering Controls: Use local exhaust ventilation to control dust
Personal Protective Equipment: Goggles, gloves (nitrile or rubber), and dust mask or respirator in high-concentration settings
Workplace Hygiene: Eyewash stations, showers, handwashing facilities should be readily accessible
Exposure Limits: No official occupational exposure limit established; prudent to minimize airborne dust and skin contact
Appearance: White crystalline powder
Odor: Odorless or faint sulfur smell
Solubility: Easily dissolved in water, forms a clear solution
Melting Point: Above 48°C for pentahydrate
Boiling Point: Decomposes before boiling
Density: About 1.7 g/cm3 for pentahydrate
pH (10% Solution): 6-8
Stability: Stable under ordinary temperature and pressure, loses water of crystallization over time
Chemical Stability: Remains stable under proper storage
Incompatible Materials: Strong acids (produces toxic sulfur dioxide), strong oxidizers
Hazardous Decomposition: Sulfur oxides, hydrogen sulfide, sodium oxide on strong heating
Polymerization: Does not occur
Special Hazards: Humidity may cause caking and decreased effectiveness
Acute Toxicity: Oral LD50 for rats estimated greater than 5000 mg/kg, considered of low toxicity
Chronic Exposure: Prolonged skin contact may cause irritation or minor dermatitis
Irritation: Mild irritant for eyes and skin in sensitive people
Allergic Reactions: Sensitization rare, but possible in predisposed individuals
Inhalation: Dust may cause coughing or sneezing, especially for asthmatics
Ecotoxicity: Generally low for aquatic life at environmentally relevant concentrations, but large discharges may deplete oxygen
Persistence: Breaks down in environment to sulfate and elemental sulfur
Mobility: Dissolves and disperses readily in water
Bioaccumulation: Unlikely to accumulate up food chains
Waste Treatment: Collect and reuse if uncontaminated, otherwise follow local hazardous waste guidelines
Prevent Releases: Do not pour in drains or sewers that reach surface waters
Regulations: Abide by local, regional, and national rules for chemical disposal; consult municipal authorities when in doubt
UN Number: Not regulated for most transport modes
Transport Hazard Class: Not hazardous
Packaging Requirements: Use strong, sealed containers to prevent moisture uptake and spillage
Labeling: Mark as chemical, not hazardous, with clear product identification tag
Inventory Status: Listed on TSCA, REACH, and other major chemical inventories
Safety Regulations: OSHA GHS-compliant safety labels and trained personnel for handling
State and Local Laws: Stored and used in accordance with workplace safety rules and environmental protection standards
Product Restrictions: None specific for sodium hyposulfite in general use; certain processes (such as photography, water treatment) may fall under special local guidelines
West Ujimqin Banner, Xilingol League, Inner Mongolia, China
