Product Name: Potassium 2,5-Dihydroxybenzenesulphonate
Chemical Formula: C6H3KO5S
Synonyms: Potassium Hydroquinone Sulfonate, Potassium Hydroquinone-2-Sulfonate, Potassium 1,4-dihydroxy-2-sulfonatobenzene
CAS Number: 15470-50-5
Recommended Uses: Photographic chemicals, chemical synthesis, intermediate in organic production
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Classification: Minimal acute toxicity, May be irritating to eyes and skin, May cause respiratory tract irritation in dust form, Not classified as a hazardous substance under GHS in most jurisdictions
Pictograms: None, skin and eye irritation potential
Signal Word: Warning
Hazard Statements: Causes mild skin and eye irritation, May form hazardous dust clouds
Precautionary Statements: Wear protective gloves or clothing if handling powder, Avoid inhaling dust, Wash thoroughly after handling, Use only with adequate ventilation
Route of Exposure: Inhalation, skin/eye contact, ingestion
Health Effects: Irritation to skin, eyes, throat, possible mild allergic reaction upon repeated exposure
Environmental Effects: Product should not reach uncontrolled water sources, Potential aquatic hazard in concentrated forms
Chemical Name: Potassium 2,5-Dihydroxybenzenesulphonate
CAS Number: 15470-50-5
Concentration: >98% by weight
Impurities: Residual organic contaminants (<2%) not considered hazardous
Other Ingredients: None declared, no hazardous additives
Eye Contact: Rinse immediately with plenty of water for at least 15 minutes, keep eyelids apart, contact medical attention if irritation persists
Skin Contact: Wash thoroughly with soap and water, remove contaminated clothing and launder before reuse, seek medical attention for irritation or rash
Inhalation: Move to fresh air, assist inhalation if breathing becomes difficult, contact a physician if symptoms continue
Ingestion: Rinse mouth well, drink water if conscious, never induce vomiting unless directed by medical personnel, seek immediate medical help for large amounts
Symptoms and Effects: Redness, itching, watering of eyes, local irritation, coughing or shortness of breath from inhaled powder
Suitable Extinguishing Media: Use water spray, alcohol-resistant foam, dry chemical, or carbon dioxide
Hazardous Combustion Products: Sulphur oxides, carbon oxides, potassium oxides
Specific Hazards: Thermal decomposition releases toxic fumes, material may assist combustion in presence of strong oxidizers
Protective Equipment for Firefighters: Self-contained breathing apparatus, full protective gear
Special Advice: Cool exposed containers with water spray to prevent rupture, avoid inhalation of vapors or decomposition products
Explosion Data: No sensitivity to impact or static discharge under normal conditions
Personal Precautions: Ventilate area, avoid dust formation, use personal protective equipment such as safety goggles and gloves
Environmental Precautions: Prevent further leakage or spillage if possible without risk, do not let product enter drains or watercourses
Containment Methods: Avoid creating dust, sweep up and shovel into suitable closed containers for disposal
Clean-up Procedures: Wash affected area with plenty of water after removing most of the substance, dispose according to local regulations, ventilate space
Advice for Emergency Responders: Wear chemical-resistant clothing, ensure adequate ventilation to prevent dust accumulation
Handling: Minimize dust generation and accumulation, wear suitable protective clothing, avoid contact with skin and eyes, use only in well-ventilated areas, do not eat or drink when using the product, wash hands after use
Storage: Store tightly closed in original container, keep away from incompatible materials such as strong acids, oxidizers, and reducing agents, store in cool, dry, and well-ventilated place, avoid humidity and moisture, keep out of reach of children
Incompatibilities: Oxidizing agents, strong acids, moisture
Specific Precautions: Do not store near food, beverages, or animal feed, segregate from reactive or combustible materials
Occupational Exposure Limits: No established OSHA/ACGIH limits for this compound
Engineering Controls: Use local exhaust or general ventilation to keep airborne levels below exposure guidelines, handle in a chemical fume hood if risk of dust
Personal Protection Equipment: Chemical-resistant gloves (nitrile or rubber), safety goggles or face shield, lab coat or chemical apron
Respiratory Protection: Use NIOSH-certified mask if dust airborne, especially in poorly ventilated areas
Hygiene Measures: Wash hands, face, and forearms thoroughly after handling, launder contaminated clothing before reuse, never eat, drink, or smoke where chemicals are used
Appearance: White to pale beige crystalline powder
Odor: Odorless or very slight organic scent
Odor Threshold: Not established
pH (10% solution): 5-7
Melting Point/Range: Decomposes above 300°C
Boiling Point/Range: Not applicable (decomposes before boiling)
Flash Point: Not flammable
Flammability (solid/gas): Not classified as flammable
Explosive Limits: Not applicable
Vapor Pressure: Not volatile
Vapor Density: Not applicable
Relative Density: 1.6 g/cm³ (approximate)
Water Solubility: Readily soluble
Partition Coefficient (n-octanol/water): Not determined
Auto-ignition Temperature: Not self-igniting
Decomposition Temperature: Above 300°C
Evaporation Rate: Not applicable
Viscosity: Not applicable (solid)
Chemical Stability: Stable under normal storage and handling conditions
Reactivity: Reacts with strong oxidizers and acids, may release hazardous gases in such cases
Hazardous Reactions: May react with moisture, releases heat upon contact with hot surfaces or compatible solvents
Conditions to Avoid: Excessive heat, direct sunlight, contact with moisture, strong oxidizers/acids
Incompatible Materials: Oxidizing agents, acids, reducing agents, metals such as aluminum
Hazardous Decomposition Products: Sulphur dioxide, potassium oxides, carbon monoxide, carbon dioxide, other decomposition products depending on conditions
Acute Toxicity: No reliable acute toxicity data for humans, LD50 (oral, rat) >2000 mg/kg, low toxicity expected from brief exposure
Skin Irritation: Mild irritant to skin, can cause dryness or redness with prolonged contact
Eye Irritation: Moderate irritant, can cause redness, pain, or tearing if dust enters eye
Respiratory Sensitization: May cause temporary respiratory irritation if inhaled as airborne dust
Chronic Effects: No evidence of long-term health impacts from repeated low exposure, possible allergic skin reaction for sensitive individuals
Carcinogenicity: No component listed as carcinogen by IARC, NTP, ACGIH, or OSHA
Mutagenicity: Not classified as mutagenic, no reliable evidence from animal studies
Reproductive Toxicity: Not classified as toxic to reproduction
Ingestion Effects: Large quantities may cause nausea, vomiting, abdominal pain, no significant hazard in usual workplace settings
Ecotoxicity: Not toxic to aquatic organisms at low concentrations, high local concentrations may cause aquatic harm
Environmental Fate: Water soluble and mobile in soil, not expected to bioaccumulate significantly
Persistence and Degradability: Biodegrades slowly, sulfate group enhances water solubility and breakdown
Bioaccumulative Potential: Expected to be low due to solubility
Mobility in Soil: Readily mobile, risk of leaching into groundwater if spillage occurs
Other Adverse Effects: Prevent entry into natural waterways and sewers, proper disposal practices advised
Waste Treatment Methods: Dispose as hazardous waste according to local requirements, avoid release to environment
Disposal Containers: Use tightly closed and appropriately labeled containers, segregate from food and water sources
Recommended Disposal: Send to licensed chemical disposal facility, do not discharge to uncontrolled drains
Special Precautions: Consult local waste authorities or hazardous waste contractor, use personal protective equipment when handling residues
Contaminated Packaging: Empty containers retain product residues, treat as hazardous material, do not reuse for other purposes
UN Number: Not classified as dangerous for transport
Proper Shipping Name: Potassium 2,5-Dihydroxybenzenesulphonate
Transport Hazard Class: Not regulated as hazardous
Packing Group: Not applicable
Marine Pollutant: No
Transport Labels: None required
Special Precautions During Transport: Protect from physical damage during transport, avoid moisture and heat, keep container upright and securely closed
Transport by Air/Rail/Road/Sea: No special restrictions, follow standard practices for non-hazardous chemicals
Labelling Requirements: Not classified as hazardous under US OSHA, EU CLP, or GHS standards, basic safety and risk phrases apply
Inventory Status: Listed on major chemical inventories such as TSCA (USA), EINECS (EU), DSL (Canada)
Right-to-Know Components: Not listed as hazardous on US SARA, Proposition 65, or CERCLA
REACH Registration: Registered for uses in industry where required
Restrictions: No specific legal restrictions on use, adherence to best safety practices still required
Other Regulations: Employer training and workplace labeling must comply with standards for safe chemical handling, safety datasheets must be available to workers
