Description

4-Aminophthalic Acid is a versatile aromatic dicarboxylic acid derivative, serving as a critical building block in advanced organic synthesis. Its bifunctional nature, featuring both an amino and two carboxylic acid groups, makes it a valuable precursor for creating complex molecular architectures. This compound is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries, particularly for developing active ingredients, dyes, and high-performance polymers.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds with fused aromatic ring systems.
• Dye and Pigment Manufacturing: Serves as a starting material for producing azo dyes, fluorescent dyes, and other complex colorants.
• Agrochemical Synthesis: Used in the development of herbicides, fungicides, and plant growth regulators that require specific aromatic acid backbones.
• Polymer Chemistry: Acts as a monomer or cross-linking agent for synthesizing polyamides, polyimides, and other high-temperature resistant polymers.
• Coordination Chemistry & Metal-Organic Frameworks (MOFs): Functions as a multidentate ligand for chelating metal ions in catalyst design and porous material construction.
• Chemical Research & Development: A valuable reagent for academic and industrial R&D in organic synthesis and material science.

Basic Information

Product Name	4-Aminophthalic Acid
CAS No.	5434-21-9
Molecular Formula	C8H7NO4
Molecular Weight	181.15 g/mol
Synonyms	4-Aminobenzene-1,2-dicarboxylic Acid; 1,2-Benzenedicarboxylic Acid, 4-Amino-; 4-Aminophthalate; 4-Amino-1,2-benzenedicarboxylic Acid; 4-Aminophthalic Acid Monohydrate (common form); 4-NH2-Phthalic Acid
EINECS	226-596-8

Quality Control

Our 4-Aminophthalic Acid is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing to ensure it meets high-purity standards for research and industrial use. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming identity, purity, and impurity profiles. We adhere to relevant industry guidelines and can support compliance documentation as required.

Storage

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

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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