Overview
2,4,6-Tribromophenol (TBP) is an organobromine compound derived from phenol, where three hydrogen atoms are replaced by bromine. It is primarily synthesized through the bromination of phenol. The compound is notable for its flame-retardant properties due to the presence of bromine, which inhibits combustion by releasing bromine radicals that interrupt the fire cycle. Industrially, TBP serves as a precursor for other brominated compounds and is utilized in niche applications such as laboratory reagents and specialty polymers. Its stability and reactivity make it valuable in synthetic chemistry, though its environmental persistence requires careful handling.
Physical and Chemical Properties
TBP appears as a white to pale yellow crystalline solid with a characteristic phenolic odor. It has a high density (2.55 g/cm³) due to its bromine content and melts at 92–95°C, decomposing near its boiling point. The compound is lipophilic, dissolving readily in organic solvents like ethanol but exhibiting minimal water solubility (0.1 g/L at 25°C). Chemically, TBP acts as a weak acid (pKa ~6.5) and undergoes reactions typical of phenols, such as etherification and electrophilic substitution. Its bromine atoms can participate in nucleophilic displacement, enabling its use in synthesizing more complex brominated derivatives.
Main Applications
The primary use of TBP is as a flame retardant in plastics, textiles, and coatings, where it decomposes under heat to release bromine radicals that quench flames. It is also a key intermediate in producing tetrabromobisphenol-A (TBBPA), a widely used flame retardant in electronics. In pharmaceuticals, TBP derivatives are explored for antimicrobial activity. Agrochemical formulations may incorporate it as a stabilizer or intermediate. Niche applications include its use in dye synthesis and as a reagent in analytical chemistry for detecting phenols.
Safety and Storage
TBP is classified as harmful (H302/H312/H315) and poses risks if ingested, inhaled, or contacted with skin. Proper PPE (gloves, goggles, respirators) is mandatory during handling. It may release toxic hydrogen bromide fumes when heated. Storage requires cool (<30°C), dry conditions in tightly sealed containers, segregated from oxidizers. Spills should be contained with inert absorbents and disposed of as hazardous waste. Environmental release must be minimized due to its bioaccumulation potential and toxicity to aquatic life.
B2B Procurement Guide
When procuring TBP, prioritize suppliers with ISO 9001 certification and batch-specific Certificates of Analysis (CoA) confirming purity (≥98%). Verify CAS 118-79-6 to avoid counterfeit products. Bulk shipments (25 kg drums or palletized quantities) typically offer cost savings. Regulatory compliance is critical: ensure the supplier provides SDS aligned with GHS standards and REACH/EPA registrations. For international shipments, confirm adherence to transport regulations (e.g., IMDG for sea freight). Sample testing for residual solvents or heavy metals is advisable for sensitive applications.
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