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Product Name: Hydroquinone Dipropionate
Chemical Formula: C14H16O4
Synonyms: Hydroquinone, 1,4-di(propionyloxy)-, Dipropionylhydroquinone
CAS Number: 1164-71-6
Recommended Use: Laboratory chemicals, intermediate in chemical synthesis, cosmetic ingredient (for external use only)
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GHS Classification: Skin irritant, Eye irritant, Acute toxicity (oral), Harmful if swallowed
Signal Word: Warning
Hazard Statements: Causes skin and eye irritation, Harmful if inhaled, May cause respiratory tract irritation, Toxic to aquatic organisms with long lasting effects
Precautionary Statements: Avoid all contact with skin, eyes, and clothing; Wear appropriate protective clothing; Do not eat, drink, or smoke when handling; Wash thoroughly after handling
Potential Health Effects: Redness, inflammation, headache, dizziness, allergic reactions
Chemical Name: Hydroquinone Dipropionate
CAS Number: 1164-71-6
Concentration: >98%
Impurities: Minor hydroquinone and propionic acid derivatives (<2%)
Additives: None reported
Molecular Weight: 248.27 g/mol
Inhalation: Move to fresh air, keep at rest, seek medical attention if symptoms develop
Skin Contact: Remove contaminated clothing, wash affected skin with soap and plenty of water for at least 15 minutes, consult a doctor for irritation or allergic reactions
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present and easy, continue rinsing, get medical help
Ingestion: Do not induce vomiting, rinse mouth with water, never give anything by mouth to an unconscious person, seek immediate medical attention
Advice to Physicians: Treat symptomatically, monitor respiratory, cardiac, and renal functions
Suitable Extinguishing Media: Water spray, carbon dioxide, dry chemical powder, suitable foam
Unsuitable Media: Do not use a solid water stream as it may spread fire
Specific Hazards: Combustion produces hazardous fumes, including carbon monoxide, carbon dioxide, and irritating organic vapors
Special Protective Equipment: Firefighters need self-contained breathing apparatus and full protective clothing
Firefighting Instructions: Move containers from area if safe, cool exposed containers with water spray, prevent runoff from entering water drains
Personal Precautions: Evacuate unnecessary personnel, ensure adequate ventilation, avoid dust formation, avoid all contact with skin and eyes
Protective Equipment: Use suitable protective clothing, gloves, and eye protection
Environmental Precautions: Prevent entry into drains, surface, and ground water
Spill Cleanup Methods: Sweep up and place in a suitable container for disposal, avoid raising dust, ventilate area, wash spill site after material pickup, dispose in accordance with local regulations
Handling: Use in a chemical fume hood, avoid inhalation and contact with skin, eyes, and clothing, wash hands thoroughly after use, handle away from sources of ignition or strong oxidizers
Storage: Store tightly closed in a cool, dry, well-ventilated area, away from sunlight and incompatible substances such as oxidizers and strong acids, keep container clearly labeled, store away from food and drink
Occupational Exposure Limits: No established ACGIH or OSHA exposure limits for Hydroquinone Dipropionate; adhere to site-specific safe work practices
Engineering Controls: Use local exhaust ventilation or chemical fume hood
Eye Protection: ANSI-approved safety goggles
Skin Protection: Suitable chemical-resistant gloves (nitrile, neoprene), protective laboratory coat
Respiratory Protection: Use an approved particulate respirator if dust/aerosol exposure is possible
Hygiene Measures: No eating, drinking, or smoking during use, wash hands and face before breaks and after handling
Appearance: White to off-white crystalline powder
Odor: Slight, characteristic odor
Odor Threshold: Not determined
Melting Point: 82 – 85°C
Boiling Point: Not determined
Solubility: Slightly soluble in water, soluble in ethanol and acetone
pH: Not applicable (insoluble in water)
Vapor Pressure: Not available
Vapor Density: Not available
Partition Coefficient (octanol/water): Not available
Flash Point: >170°C
Evaporation Rate: Not determined
Auto-ignition Temperature: Not available
Decomposition Temperature: Not determined
Viscosity: Not applicable (solid)
Chemical Stability: Stable under recommended storage and handling conditions
Reactivity: May react with strong oxidizers, acids, and strong bases
Hazardous Reactions: Decomposes on heating with the release of dangerous gases
Conditions to Avoid: Excessive heat, open flames, light, incompatible materials
Incompatible Materials: Strong oxidizing agents, strong bases, strong acids
Hazardous Decomposition Products: Carbon oxides, organic acids, irritating fumes
Routes of Entry: Inhalation, ingestion, skin and eye contact
Acute Toxicity: Data limited for hydroquinone dipropionate; comparison to hydroquinone suggests risk of skin and eye damage, potential systemic toxicity, estimated LD50 (oral, rat) >2000 mg/kg
Symptoms of Exposure: Redness, burning sensation, headache, skin irritation, nausea
Chronic Effects: Repeated or prolonged contact may cause skin sensitization, risk of dermatitis, possible kidney and liver impairment with high exposure
Carcinogenicity: Hydroquinone classified by IARC as group 3 (not classifiable as to its carcinogenicity to humans); data on ester derivative are lacking
Mutagenicity: No data for this compound
Reproductive Toxicity: No data for ester form, precaution recommended
Target Organs: Eyes, skin, respiratory tract, liver, kidneys
Ecotoxicity: Harmful to aquatic life with long lasting effects, potential to cause toxic response in fish and invertebrates at low concentrations
Persistence and Degradability: Expected to degrade slowly, ester bond subject to hydrolysis, persistence may increase with low biodegradation
Bioaccumulative Potential: Limited evidence of significant bioaccumulation
Mobility in Soil: Moderate to low mobility expected
Other Information: Avoid release to environment, prevent spill from entering waterways
Waste Disposal Methods: Dispose of as hazardous chemical waste in line with local, regional, national, and international regulations
Contaminated Packaging: Triple rinse, offer for reconditioning if possible, otherwise dispose as chemical waste
Disposal Precautions: Incineration recommended for material and contaminated equipment, do not allow material to reach sewage system
Other Considerations: Adhere to EPA/EU waste codes and local laws
UN Number: Not regulated for transport under most conditions but handle as hazardous chemical
Proper Shipping Name: Hydroquinone Dipropionate
Transport Hazard Class: Not classified; environmental hazard possible
Packing Group: Not assigned
Transport Precautions: Keep container tightly closed, protect from sunlight, secure load to prevent shifting, carry documentation describing chemical’s hazards
USA: Not listed under TSCA, SARA 313, or CERCLA; treat as hazardous for laboratory safety
EU: Not REACH registered, not included in Annex XIV or XVII restricted substances
Canada: Not on DSL/NDSL; may require notification prior to import
Other Regulations: Always check local, state, and national requirements; labeling and workplace safety requirements may apply
SDS Standard Compliance: Prepared using OSHA HCS, GHS, and EU CLP guidelines
