Overview
Hydroxyhexafluorobenzene (C6HF5O) is a fluorinated aromatic compound where five hydrogen atoms in benzene are replaced by fluorine, and one is substituted with a hydroxyl group. Its unique structure confers high chemical stability and reactivity, making it valuable in advanced organic synthesis. First synthesized in the mid-20th century, this compound gained industrial importance due to its role as a building block for pharmaceuticals and agrochemicals. The fluorine atoms enhance its lipophilicity and electron-withdrawing properties, which are exploited in designing bioactive molecules.
Physical and Chemical Properties
The compound crystallizes as white to off-white needles with a characteristic phenolic odor. Its high density (1.678 g/cm³) reflects the presence of heavy fluorine atoms. The melting point (36-38°C) is lower than non-fluorinated phenols due to reduced hydrogen bonding. Chemically, it exhibits typical phenol reactivity (e.g., acidity, ether formation) but with enhanced stability against electrophilic substitution. The electron-withdrawing fluorine atoms increase the hydroxyl group's acidity (pKa ~5.5), facilitating deprotonation in mild conditions. It is stable to air and moisture but may decompose at temperatures above 200°C.
Main Applications
In pharmaceuticals, hydroxyhexafluorobenzene serves as a precursor for antifungal and antiviral agents, leveraging fluorine's metabolic stability. It is also used in synthesizing liquid crystal materials for displays, where its rigid structure improves thermal stability. The agrochemical industry employs it to create herbicides and pesticides with prolonged environmental persistence. Additionally, it acts as a crosslinking agent in high-performance polymers like fluorinated epoxies, which resist extreme temperatures and chemical corrosion.
Safety and Storage
While not highly toxic, direct contact may cause skin/eye irritation. Use nitrile gloves and safety goggles when handling. Ensure adequate ventilation to avoid vapor inhalation. Spills should be contained with inert absorbents (e.g., sand) and disposed of as hazardous waste. Store in sealed amber glass or fluoropolymer-lined containers under nitrogen to prevent degradation. Incompatible with strong oxidizers (e.g., peroxides) and bases. Shelf life exceeds two years when stored at ≤25°C with desiccants.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification and batch-specific Certificates of Analysis (COA). Purity ≥98% is standard for most applications, though ultra-pure grades (≥99.5%) are available for pharmaceutical use. Bulk orders (100kg+) typically reduce costs by 15-30%. Confirm logistics protocols—some vendors require temperature-controlled transport due to the low melting point. Regional regulations (e.g., REACH, TSCA) may apply for international shipments.
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