Your Tetrabutylphosphonium Hydroxide Partner – Superior Supply from Aure Chemical
Tetrabutylphosphonium Hydroxide (TBPH) (CAS 14518-69-5) is a highly versatile quaternary phosphonium salt used primarily as a strong organic base and a Phase-Transfer Catalyst (PTC). It is typically supplied as a clear, colorless to pale yellowish aqueous or alcoholic solution. TBPH offers a significant advantage over traditional inorganic bases (like NaOH or KOH) and ammonium-based bases due to its enhanced thermal stability and excellent solubility in both water and many organic solvents. The large, lipophilic tetrabutylphosphonium cation allows the highly active hydroxide anion to be carried efficiently into the organic phase, accelerating complex organic and industrial reactions.
Basic Information of TBPH
Meticulously produced and rigorously tested to meet stringent quality standards. We ensure exceptional purity and consistent performance, essential for your critical applications:
| CAS No.: | 14518-69-5 |
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| EC No.: | 238-528-0 |
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| Linear Formula: | C16H37OP |
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| Molecular Weight: | 276.44 |
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| Appearance: | Clear, colorless to pale yellowish aqueous solution |
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| Odor: | Slight amine-like or solvent odor |
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| Boiling Point: | 00 °C − 105 °C (Boiling point of solution) |
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| Density: | 0.989 g/mL at 25 °C |
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| Solubility: | Miscible with water; soluble in lower alcohols and polar organic solvents. |
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| RIDADR: | UN 3267 8/PG 2 |
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| Chemical Structure: |  |
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Application Overview
TBPH's dual function as a strong base and an effective PTC makes it indispensable for numerous high-performance industrial processes:
Epoxy Resin Curing: A principal application is as an accelerator or latent curing agent for epoxy resins and coatings. It provides fast, low-temperature curing while enhancing the thermal and chemical resistance of the final cured polymer.
Silicone Manufacturing: Used as a catalyst or polymerization initiator in the synthesis of silicone polymers, providing precise control over the condensation and polymerization steps to produce high-quality silicone fluids and elastomers.
Phase-Transfer Catalysis (PTC): Highly effective in facilitating reactions that require a strong base in an organic environment, such as alkylations, condensations, and eliminations, by efficiently carrying the hydroxide ion into the organic phase.
Ionic Liquid Synthesis: A key starting material for preparing advanced Tetrabutylphosphonium-based ionic liquids. The TBPH is easily reacted with various acids to substitute the hydroxide anion, creating thermally stable, customized ILs.
Why Choose Aure Chemical for Tetrabutylphosphonium Hydroxide?
Aure Chemical offers TBPH (CAS 14518-69-5) with specialized quality controls focused on maximizing its catalytic activity, thermal stability, and low metal content.
Ultra-Low Halide Impurity: We guarantee extremely low levels of halide counterions (Bromide or Chloride), which are common byproducts from the synthesis of phosphonium salts. Minimizing halides prevents unwanted side reactions and ensures maximum base strength and thermal stability in sensitive curing and polymerization processes.
High Catalytic Purity and Assay: We provide TBPH with a tightly controlled assay concentration (e.g., 40.0% ± 0.5%), verified by precise acid-base titration. This accuracy is critical for predictable reaction kinetics and dosage in high-volume industrial catalysis and polymerization.
Metal-Free Certification: Our material is produced using a purification process that yields a certified, ultra-low metal content product. This is essential for electronics applications (semiconductors, displays) and high-purity polymer synthesis where trace metal contamination can severely impact device performance and polymer coloration.
Specialized Stabilization and Packaging: Given its thermal sensitivity and corrosiveness, TBPH is shipped in dedicated, high-density polyethylene (HDPE) containers with venting caps. Our controlled storage conditions minimize thermal degradation and CO 2 absorption, maintaining the integrity and activity of the strong base.
Hazards Classification
GHS Classification: Skin Corr. 1B (GHS05)
Hazard Statements: Causes severe skin burns and eye damage.
UN Number: UN 3267
Hazard Class: 8 (Corrosive substances)
Packing Group: II
GHS05: Corrosive
