Description

3-Cyclopentyl-5-tert-Butyl-4-Hydroxybenzoic Acid is a specialized benzoic acid derivative featuring a sterically hindered phenolic hydroxyl group, which is critical for its function as a high-performance antioxidant and stabilizer. This compound is engineered to provide superior protection against thermal and oxidative degradation in demanding polymer and synthetic material applications. It is primarily sought by formulators and manufacturers in the polymer, plastics, and specialty chemical industries for enhancing product longevity and performance under stress.

Application

• Primary antioxidant and stabilizer in polyolefins (e.g., PP, PE) and engineering plastics.
• Additive in synthetic lubricants and greases to prevent oxidation and viscosity breakdown.
• Stabilizing agent for adhesives, sealants, and elastomers to extend shelf life and maintain properties.
• Intermediate in the synthesis of more complex hindered phenol antioxidants and UV stabilizers.
• Potential use as a stabilizer in specialty coatings and resins requiring high-temperature processing.
• Research and development of novel polymer additives and pharmaceutical intermediates.

Basic Information

Product Name	3-Cyclopentyl-5-tert-Butyl-4-Hydroxybenzoic Acid
CAS No.	93777-77-6
Molecular Formula	C₁₆H₂₂O₃
Molecular Weight	262.35 g/mol
Synonyms	4-Hydroxy-3-cyclopentyl-5-tert-butylbenzoic Acid; 5-tert-Butyl-3-cyclopentyl-4-hydroxybenzoic Acid; Benzoic acid, 3-cyclopentyl-5-(1,1-dimethylethyl)-4-hydroxy-; 3-Cyclopentyl-5-(tert-butyl)-4-hydroxybenzoic Acid; Antioxidant 93777-77-6; Hindered Phenol Antioxidant Intermediate
EINECS	Contact for details

Quality Control

Our production of 3-Cyclopentyl-5-tert-Butyl-4-Hydroxybenzoic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry benchmarks. Certificates of Analysis (COA) documenting all critical quality parameters are provided as standard.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.