Product Name: Butyltriphenylphosphonium Bromide
Synonyms: Triphenylphosphonium, butyl-, bromide
CAS Number: 2751-90-8
Manufacturer: Common chemical manufacturers in the specialty chemical sector
Recommended Uses: Phase-transfer catalyst, electronic lab research, pharmaceutical intermediate
Emergency Phone: Supplier emergency line or local poison control center
Classification: Irritant to eyes, skin, and respiratory tract
Signal Word: Warning
Hazard Statements: Causes skin irritation, serious eye irritation; may cause respiratory tract irritation
Pictograms: Exclamation mark symbol
Precautionary Statements: Avoid contact with eyes, skin, and clothing; avoid inhalation of dust or fumes; wear protective equipment and use in a well-ventilated area
Potential Health Effects: Exposure may lead to burning eyes, coughing, or skin redness; persons with pre-existing skin or respiratory issues may face more pronounced effects
Chemical Name: Butyltriphenylphosphonium Bromide
CAS Number: 2751-90-8
Percentage by Weight: Over 98% as pure compound for laboratory use
Impurities and Stabilizing Additives: Typically contains only trace solvents from manufacturing
Inhalation: Move person to fresh air, keep comfortable, seek medical attention for persistent symptoms
Skin Contact: Wash exposed skin immediately with soap and plenty of water; remove contaminated clothing; seek help if irritation or rash persists
Eye Contact: Rinse eyes carefully with water for several minutes; remove contact lenses if present and easy; seek medical attention without delay for ongoing discomfort
Ingestion: Rinse mouth thoroughly; do not induce vomiting; consult healthcare provider promptly
Most Important Symptoms: Redness, burning, tearing, coughing, and abdominal discomfort
Advice for Providers: Symptomatic treatment; no specific antidote
Suitable Extinguishing Media: Dry chemical, CO₂, foam, or water spray for small fires
Special Protective Equipment: Firefighters wear self-contained breathing apparatus and full protective clothing
Hazardous Combustion Products: Phosphine oxides, hydrocarbon vapors, bromine compounds
Advice for Firefighters: Approach fire upwind; remain cautious against toxic fumes and corrosive vapors; use standard fire suppression practices; prevent runoff from contaminating nearby water
Specific Hazards: Material may decompose under fire conditions creating irritating or toxic gases
Personal Precautions: Isolate spill area; use gloves, goggles, laboratory coat, and dust mask
Methods for Containment: Scoop or sweep up carefully without creating dust; place residues in a suitable, closed container for disposal
Clean-Up Procedures: Flush trace residues with copious water only in controlled conditions; avoid respirable dust
Environmental Precautions: Prevent further leakage or spillage if safe; avoid discharge into drains and watercourses
Handling Precautions: Handle in well-ventilated areas; avoid breathing dust and contact with eyes, skin, and clothing; use tools and equipment that minimize dust formation
Storage Requirements: Store in tightly closed containers, away from light, heat, ignition sources, and incompatible substances such as strong oxidizers or acids
Incompatibilities: Avoid strong bases, oxidizers, and acids
Other Notes: Separate from food and beverages; implement strict labeling and containment policies
Occupational Exposure Limits: Not established for this compound specifically; respiratory irritation threshold at low concentrations
Engineering Controls: Work under fume hood or use local exhaust; monitor airborne particles and vapors
Respiratory Protection: NIOSH-approved particulate respirator for dusty conditions
Skin Protection: Protective gloves resistant to chemicals; lab coat and long sleeves
Eye Protection: Chemical safety goggles
Hygiene Measures: Wash hands and forearms after handling; remove dirty clothing and gear immediately
Appearance: White to off-white crystalline powder
Odor: Odorless
Melting Point: Approximately 260-265°C
Boiling Point: Decomposes before boiling
Flash Point: Not applicable (non-flammable solid)
Solubility: Soluble in water and organic solvents like methanol or acetonitrile
Vapor Pressure: Negligible at room temperature
Density: About 1.40 g/cm³
pH: Neutral to slightly alkaline in aqueous solution
Chemical Stability: Stable under recommended storage conditions
Conditions to Avoid: High temperatures, direct sunlight, strong acids or oxidizers
Materials to Avoid: Oxidizing agents, strong acids, strong bases
Hazardous Decomposition Products: Carbon oxides, phosphine compounds, bromine-containing vapors, hydrogen bromide on combustion
Possibility of Hazardous Reactions: Unlikely under standard laboratory conditions; violent reactions with incompatible materials
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Symptoms: Throat and respiratory irritation, coughing, headache, skin redness, eye pain, gastrointestinal upset
Acute Toxicity: No established LD50 in animals, but low to moderate toxicity expected
Chronic Exposure Effects: Prolonged or repeated exposure may exacerbate skin conditions or lead to dermatitis; no known carcinogenicity by IARC, NTP, or OSHA
Sensitization: No evidence of respiratory or skin sensitization in available literature
Aquatic Toxicity: No extensive data; similar phosphorus-containing compounds suggest possible moderate aquatic impact
Persistence and Degradability: Stable, not rapidly biodegradable
Bioaccumulative Potential: Likely low due to high water solubility
Mobility in Soil: May leach with water, but not considered highly mobile
Other Adverse Effects: Avoid direct release to environment because of potential long-term impact, especially in aquatic ecosystems
Disposal Methods: Gather any unused material and packaging for shipment to licensed chemical disposal facility; do not dispose via household drains or normal trash
Contaminated Packaging: Rinse empty containers with water and dispose as hazardous laboratory waste
Regulatory Restrictions: Comply with local, regional, and national regulations regarding chemical waste disposal particularly for halogenated organic compounds
UN Number: Not classified as dangerous for transport
Proper Shipping Name: Not established due to limited hazard; ship as chemical substance, not otherwise specified if required
Transport Hazard Class: Non-regulated for air, rail, and road transport
Packing Group: Not applicable
Special Precautions: Use intact containers, avoid physical damage, include emergency contact information
TSCA Status: Listed
REACH Compliance: Not registered or pre-registered due to low market volume
SARA Title III: Not listed in Sections 302, 304, or 313
California Proposition 65: Compound is not currently known to the State of California to cause cancer or reproductive harm
Other Regulatory References: Observe all federal, state, and local chemical safety laws regarding phosphonium salts and laboratory chemicals
