Product Name: Sodium 4-Hydroxybenzene Sulfoate (Dihydrate)
Chemical Formula: C6H5NaO5S·2H2O
Common Names: Sodium p-Hydroxybenzenesulfonate Dihydrate, Sodium PHBS Dihydrate
Recommended Use: Dye manufacture, chemical intermediates, laboratory reagent
Manufacturer Information: Source, address, phone number of the supplier or manufacturer
Emergency Phone Number: Emergency contact related to chemical incidents
CAS Number: 61702-44-1
UN Number: Data for transportation and identification in transit
Synonyms: Sodium p-Hydroxybenzenesulfonate Dihydrate, p-Sodium Phenol Sulfonate Dihydrate
Classification: Acute Oral Toxicity Category 5, Eye Irritation Category 2A, Skin Sensitization Category 1B
GHS Label Elements: Health hazard pictogram, exclamation mark pictogram
Signal Word: Warning
Hazards: May cause skin and eye irritation, irritation to mucous membranes, possible respiratory tract discomfort at high concentrations
Precautionary Statements (Prevention): Avoid breathing dust, avoid contact with eyes and skin, use in well-ventilated areas, wear protective equipment
Chronic Effects: Prolonged or repeated exposure may lead to dermatitis or respiratory symptoms
Environmental Hazards: Potential risk of aquatic toxicity, avoid uncontrolled environmental releases
Chemical Name: Sodium 4-Hydroxybenzene Sulfoate (Dihydrate)
CAS Number: 61702-44-1
Concentration: 98% or greater
Other Ingredients: No significant impurities relevant to safety or health listed
Molecular Weight: 246.18 g/mol
Component Classification: Single component, no hazardous coagulants or stabilizers
Inhalation: Move victim to fresh air, administer oxygen if breathing becomes difficult, seek medical attention if symptoms persist
Skin Contact: Wash exposed area thoroughly with soap and water, remove contaminated clothing, seek medical help for persistent irritation
Eye Contact: Rinse immediately with plenty of water (15 minutes minimum), keep eyelids apart, consult ophthalmologist for continuing symptoms
Ingestion: Rinse mouth, do not induce vomiting, give water if the person is conscious, call poison center or doctor
Symptoms and Effects: Irritation, redness, coughing, discomfort in gastro-intestinal tract; possible allergic skin reaction
Immediate Medical Attention: Needed in cases of severe exposure, eye or respiratory injury, sustained skin reaction
Suitable Extinguishing Media: Water spray, carbon dioxide, foam, dry chemical extinguishers
Unsuitable Extinguishing Media: None recorded for this compound
Specific Hazards: Emission of hazardous fumes such as sulfur oxides, sodium oxides, benzene derivatives upon thermal decomposition
Fire-Fighting Instructions: Use self-contained breathing apparatus, full fire protective clothing
Explosion Risk: Not considered flammable or explosive under standard conditions; avoid dust accumulation which could create combustible dust clouds
Additional Measures: Cool containers exposed to flames with water spray, avoid inhalation of combustion products, keep people away from downwind area
Personal Precautions: Wear respirator, eye protection, impervious gloves, chemical-resistant clothing
Environmental Precautions: Prevent leakage into watercourses, drains, soil, avoid reporting to public wastewater or stormwater system
Cleanup Methods: Sweep or vacuum material using methods that minimize dust, transfer to suitable closed containers for disposal, flush residues with plenty of water
Notification Procedures: Report significant spills to environmental authorities as required
Additional Recommendations: Maintain adequate ventilation, use spark-proof tools and explosion-proof equipment, decontaminate affected area completely after cleanup
Safe Handling: Handle in well-ventilated settings, avoid creating dust, avoid exposure to eyes, skin, clothing, do not eat, drink, or smoke during use, use recommended PPE
Storage Conditions: Store in tightly sealed containers, in dry and cool locations away from strong acids, oxidizing agents, ignition sources, incompatible chemicals
Special Precautions: Use only with chemicals whose compatibility is verified, maintain separation of storage from foodstuffs and animal feeds, follow strict labeling and containment standards
Technical Measures: Employ local exhaust ventilation, provide easy access to eyewash stations and showers, regularly inspect storage containers for leaks or damage
Exposure Limits: No specific occupational exposure limits established for this compound, maintain exposure as low as reasonably achievable
Engineering Controls: Use effective local exhaust ventilation, closed processing systems for large amounts, implement regular air monitoring
Personal Protection: Use safety glasses or goggles, impervious gloves (e.g., nitrile, neoprene), chemical-resistant apron or protective suit, particulate respirator fitted for nuisance dusts
Hygiene Measures: Wash hands, face, and exposed skin thoroughly after handling, launder contaminated clothing before reuse, avoid inhalation of dust, and avoid eating or drinking in handling areas
Environmental Controls: Deploy spill catchment basins, filter air effluents, and monitor waste streams
Physical State: Solid, crystalline powder
Color: White to off-white
Odor: Odorless or mild aromatic
Melting Point: Decomposes above 250°C (482°F)
Boiling Point: Not applicable for solid salt
Solubility: Readily dissolves in water
pH (1% solution): Approximately 6.0 - 8.0
Partition Coefficient (log Kow): Not established
Flash Point: Not flammable
Vapor Pressure: Negligible at ambient temperature
Density: Around 1.7 g/cm³
Decomposition Temperature: Above 250°C; releases sulfur oxides
Appearance: Fine to coarse crystalline solid
Evaporation Rate: Not volatile at room temperature
Viscosity: Not applicable (solid form)
Chemical Stability: Stable under normal storage and handling conditions
Hazardous Reactions: Contact with strong oxidizing agents or strong acids may produce decomposition with toxic gases
Incompatible Materials: Strong acids, strong oxidizers, reducing agents
Decomposition Products: Sulfur dioxide, sodium oxides, potentially irritating fumes
Polymerization: No risk of hazardous polymerization
Conditions to Avoid: Excessive heat, moisture, contamination by incompatible materials
Acute Oral Toxicity: LD50 (rat) estimated above 2000 mg/kg
Dermal Toxicity: No acute toxicity expected under normal use
Inhalation Effects: Dust may cause irritation of respiratory tract, coughing, sneezing, throat discomfort
Skin Irritation: Potential for redness, dryness, or mild inflammation upon repeated exposure
Eye Irritation: Causes redness, stinging, watering
Sensitization: Some risk of allergic reaction with long-term exposure
Chronic Effects: No evidence of carcinogenic, mutagenic, or reproductive toxicity available; chronic skin inflammation possible with prolonged contact
Target Organs: Skin, eyes, respiratory system
Ecotoxicity: Moderate toxicity to aquatic organisms expected based on sulfonate structure; avoid large uncontrolled environmental releases
Persistence and Degradability: Not rapidly biodegradable, sulfonated compounds may persist in soil or water
Bioaccumulative Potential: Likely to have low bioaccumulation; high water solubility, expected rapid dispersion
Mobility in Soil: High mobility in aqueous environments, can leach through soils
Other Adverse Effects: Avoid direct release to natural waterways, treatment required before discharge
Product Disposal: Incinerate or dispose of through licensed hazardous waste facility, comply with local, regional, and national regulations
Contaminated Packaging: Decontaminate and recycle when possible, dispose of through licensed operators for chemical waste
Special Precautions: Do not dispose of in household garbage, drains, or natural environment
Waste Codes: Assign appropriate classification codes according to local hazardous waste guidelines
Additional Recommendations: Store waste in sealed, labeled containers away from incompatible materials until proper disposal
UN Number: Not classified as dangerous goods for transport by road, air, or sea
Proper Shipping Name: Sodium 4-Hydroxybenzene Sulfoate, Dihydrate
Transport Hazard Class: Non-hazardous for land, air, and sea
Packing Group: Not regulated
Transport Labels: No hazard label required
Special Precautions: Protect containers from physical damage and moisture, secure tightly in upright position during shipment
Additional Transport Recommendations: Ensure accessibility to Material Safety Data Sheet, emergency measures ready in case of accidental release
Inventory Status: Listed on TSCA, REACH, and similar national chemical inventories
Regulatory Classification: Not classified as hazardous under OSHA, EU CLP, or similar regulations
Risk Phrases: Irritant (Xi), R36/38 – Irritating to eyes and skin
Safety Phrases: S24/25 – Avoid contact with skin and eyes, S36 – Wear suitable protective clothing
Right-to-Know Listing: Identified according to applicable national and state chemical disclosure regulations
Additional Legal Requirements: Observe all applicable workplace health, safety, environmental, and transportation legislation
Labeling Obligation: Container labeling must match regulatory requirements regarding safety information and user protection
