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Product Name: 4,4'-Dihydroxybenzophenone
Synonyms: Benzophenone-2, BP-2, Uvinul D-50
CAS Number: 131-55-5
Recommended Use: UV absorber for plastics, resins, personal care products
Supplier: Contact distributor or manufacturer for specific supplier name and address
Emergency Contact: Refer to local poison center or emergency phone line; United States: CHEMTREC: 1-800-424-9300
GHS Classification: Eye Irritation (Category 2A); Skin Irritation (Category 2)
Signal Word: Warning
Hazard Statements: Causes serious eye irritation; Causes skin irritation
Pictograms: Exclamation mark
Precautionary Statements: Avoid contact with eyes and skin; Use only in ventilated areas; Wear protective clothing, gloves, and eye protection
Other Hazards: Dust may cause respiratory irritation and aggravate pre-existing lung conditions; Not classified as carcinogenic according to available data
Chemical Name: 4,4'-Dihydroxybenzophenone
CAS Number: 131-55-5
Concentration: ≥ 99% by weight
Impurities: Trace amounts of monochloro- and dichloro-derivatives, moisture content less than 0.2%
Additives: None reported
Eye Contact: Immediately flush eyes with plenty of water for at least 15 minutes, lifting upper and lower eyelids; Remove contact lenses if present and easy; Seek medical attention right away
Skin Contact: Wash thoroughly with soap and water; Remove contaminated clothing and wash before reuse; Get medical help if irritation develops and persists
Inhalation: Move to fresh air; If breathing becomes difficult, seek emergency medical help; Provide oxygen if breathing is labored
Ingestion: Rinse mouth with water, do not induce vomiting; Get medical attention if symptoms occur or large amount is swallowed
Most Important Symptoms: Redness, itching, swelling, and pain especially in eyes and skin; Inhalation may cause coughing and shortness of breath
Suitable Extinguishing Media: Use water spray, dry chemical, foam, or carbon dioxide; Do not use water jet directly on burning product
Specific Hazards: Emits carbon oxides (CO, CO2) and irritating fumes under combustion; Fine dust may ignite
Protective Equipment: Wear full protective gear and self-contained breathing apparatus for firefighters
Special Precautions: Avoid inhalation of combustion gases; Move containers from the fire area if it can be done safely; Prevent run-off water from entering waterways
Personal Precautions: Evacuate unnecessary personnel; Use personal protective equipment including gloves, goggles, and dust mask or respirator; Ensure adequate ventilation to control dust exposure
Environmental Precautions: Take measures to prevent further leakage or spillage; Avoid discharge into drains, surface or ground water
Clean-up Methods: Sweep up and containerize for disposal; Do not generate dust; Wipe residues with damp cloth; Wash spill area with water and detergent
Reporting Procedures: Notify authorities if large quantities enter the environment or water supply
Handling: Use with local exhaust or in a chemical fume hood; Avoid breathing dust, contact with eyes, skin, and clothing; Wash hands after use and before eating or drinking; Do not eat, drink, or smoke in work areas
Storage: Store tightly sealed in a dry, well-ventilated place away from heat and direct sunlight; Keep away from incompatible materials such as strong oxidizers and acids; Keep container upright and clearly labeled
Other Precautions: In case of damaged packaging, transfer to clean container; Regularly check containers for leaks and corrosion
Occupational Exposure Limits: Not specifically established for this compound; Use general nuisance dust limit - ACGIH TLV for particulates not otherwise classified: 10 mg/m3 (inhalable), 3 mg/m3 (respirable)
Engineering Controls: Use mechanical ventilation or local exhaust to minimize dust concentration; Enclosed handling systems recommended for powder forms
Personal Protection: Wear chemical-resistant gloves (nitrile, latex), safety goggles or face shield, lab coat or appropriate protective clothing
Respiratory Protection: NIOSH-approved dust mask or respirator in areas where dust may be generated
Hygiene Measures: Wash hands, face, and exposed skin thoroughly after handling; Do not eat or drink where material is handled, processed, or stored
Appearance: White to pale yellow crystalline powder
Odor: Slight, characteristic
Odor Threshold: Not available
pH: 5.5-6.5 (1% aqueous solution)
Melting Point: 143–146°C
Boiling Point: Decomposes before boiling
Flash Point: >200°C (closed cup)
Evaporation Rate: Not applicable
Flammability: Powdered form may be combustible
Explosion Limits: No data available
Vapor Pressure: Negligible at 20°C
Vapor Density: Not applicable
Density: 1.36 g/cm3
Water Solubility: 80 mg/L at 25°C (slightly soluble)
Partition Coefficient (log Kow): 2.92
Auto-Ignition Temperature: >350°C
Decomposition Temperature: 300°C (approximate)
Viscosity: Not applicable (solid)
Chemical Stability: Stable under recommended storage and handling conditions
Reactivity: Not reactive with common materials under standard use
Conditions to Avoid: Exposure to strong oxidizers, acids, prolonged heat, and open flames
Materials to Avoid: Strong oxidizing agents, strong acids, alkalis
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, phenolic compounds
Hazardous Polymerization: Will not polymerize under usual conditions
Likely Routes of Exposure: Inhalation, skin and eye contact, ingestion
Acute Toxicity: LD50 (oral, rat): >5000 mg/kg; No significant acute toxicity data in animals or humans
Skin Corrosion/Irritation: May cause mild to moderate irritation
Eye Damage/Irritation: Irritating to eyes and may cause redness and tearing
Respiratory Sensitization: Dust may irritate nose and throat
Chronic Effects: Prolonged or repeated exposure can cause dermatitis in sensitive individuals
Carcinogenicity: Not listed by IARC, NTP, or OSHA as a known carcinogen
Mutagenicity: Negative in standard bacterial reverse mutation tests
Reproductive Effects: No known reproductive or developmental toxicity
Other Information: No major health effects identified for trace exposure during routine use
Aquatic Toxicity: LC50 (fish, 96 h): approximately 10-100 mg/L; considered low to moderate toxicity
Persistence and Degradability: Not readily biodegradable, may persist in the environment
Bioaccumulative Potential: Moderate, based on log Kow value (2.92)
Mobility in Soil: Likely to have limited mobility due to low water solubility
Other Adverse Effects: May contribute to endocrine disruption in aquatic organisms at high concentrations; Effect on drinking water is negligible if handled correctly
Waste Treatment Methods: Dispose in accordance with regional, national, and local laws; Incineration preferred in facilities equipped to handle chemical waste
Unused Product: Collect in suitable containers for recovery or safe disposal; Do not flush to drain
Contaminated Packaging: Rinse thoroughly, then recycle or dispose of as hazardous waste
Recommendations: Avoid uncontrolled discharge; Use a licensed hazardous waste disposal contractor
UN Number: Not regulated as dangerous goods for transport
Proper Shipping Name: 4,4'-Dihydroxybenzophenone or Benzophenone-2
Transport Hazard Class: Non-hazardous
Packing Group: Not applicable
Environmental Hazards: Not classified as marine pollutant
Special Precautions: Use sealed and labeled containers during transit; Keep away from foodstuffs and animal feed
Regulatory Information for Shipping: Ensure that labeling complies with local and international transport regulations
Inventory Status: Listed on TSCA (United States), EINECS (Europe), DSL (Canada), ENCS (Japan)
SARA Title III: Not listed as hazardous under SARA 313
OSHA Hazard Communication: Classified as irritant
REACH Registration: Registered, restrictions may apply in the EU under the Cosmetics Regulation for certain end uses
California Proposition 65: Not listed
WHMIS (Canada): Classified as D2B (toxic material causing other toxic effects)
Other Regulations: Follow applicable workplace safety and environmental legislation for storage, transportation, and disposal
