Description

5-(Octadecyloxy)Isophthalic Acid is a high-purity, long-chain alkyloxy-substituted aromatic dicarboxylic acid, serving as a critical building block for advanced materials. Its unique molecular structure, featuring a hydrophobic octadecyloxy tail, makes it an essential monomer for synthesizing specialized polymers and functional additives. This compound is particularly valuable for R&D and production in the polymer, coatings, and specialty chemical industries, where it imparts specific solubility, compatibility, and surface-modifying properties.

Application

• Polymer Synthesis: Key monomer for producing polyamides, polyesters, and polyimides with enhanced hydrophobicity and thermal stability.
• Liquid Crystal Polymers (LCPs): Used as a mesogenic unit in the synthesis of high-performance LCPs for electronics and displays.
• Surface Modifiers & Additives: Acts as an intermediate for creating surfactants, dispersants, and compatibilizers that improve material performance.
• Advanced Material Research: Serves as a precursor in organic synthesis for developing novel organic electronic materials and metal-organic frameworks (MOFs).
• Specialty Coatings & Resins: Incorporated into coating formulations to modify surface energy, adhesion, and chemical resistance.

Basic Information

Product Name	5-(Octadecyloxy)Isophthalic Acid
CAS No.	143294-86-4
Molecular Formula	C₂₆H₄₂O₅
Molecular Weight	434.61 g/mol
Synonyms	5-(Stearyloxy)isophthalic Acid; Isophthalic Acid, 5-(octadecyloxy)-; 5-Octadecoxyisophthalic Acid; 5-(n-Octadecyloxy)benzene-1,3-dicarboxylic Acid; 1,3-Benzenedicarboxylic acid, 5-(octadecyloxy)-; 5-Stearyloxyisophthalic Acid; 5-(Octadecoxy)isophthalic Acid; 5-(Octadecyloxy)-1,3-benzenedicarboxylic Acid
EINECS	Contact for details

Quality Control

Our 5-(Octadecyloxy)Isophthalic Acid is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via FT-IR and NMR, to ensure it meets exacting research and industrial-grade specifications. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting key parameters such as assay, moisture content, and impurity profiles to guarantee batch-to-batch consistency and reliability for your critical applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect purity and performance.

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%
Heavy Metals	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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