Description

p-Phenylenediamine Dihydrochloride is a high-purity, water-soluble salt derivative of a primary aromatic diamine, serving as a critical intermediate and reagent in advanced chemical synthesis. Its value lies in providing a stable, readily handled form of the reactive diamine, essential for controlled reactions in demanding applications. This compound is particularly needed by manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries for processes such as heterocyclic synthesis and polymer modification.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of various active pharmaceutical ingredients (APIs), particularly for dyes used in diagnostic assays and certain heterocyclic compounds.
• Hair Dye and Cosmetic Ingredient Synthesis: Acts as a primary intermediate in the production of oxidation hair dye precursors and other permanent colorants.
• Polymer and Resin Modifier: Used in the production of aramid fibers (like Kevlar-type polymers) and epoxy curing agents to enhance thermal and mechanical properties.
• Analytical Reagent: Employed in biochemical research and as a reagent in colorimetric detection methods and enzymatic assays.
• Agrochemical Synthesis: Intermediate in the manufacture of certain herbicides, fungicides, and plant growth regulators.
• Photographic Developer Component: Used in the formulation of specialized black-and-white photographic developing solutions.
• Corrosion Inhibitor Precursor: Serves as a starting material for compounds used in metal surface treatment and protection formulations.
• Research & Development: A versatile reagent in organic chemistry laboratories for coupling reactions and the synthesis of complex organic molecules.

Basic Information

Product Name	p-Phenylenediamine Dihydrochloride
CAS No.	624-18-0
Molecular Formula	C6H10Cl2N2
Molecular Weight	181.06 g/mol
Synonyms	1,4-Phenylenediamine Dihydrochloride; p-Phenylenediamine Hydrochloride; 1,4-Diaminobenzene Dihydrochloride; PPD Dihydrochloride; 4-Aminoaniline Dihydrochloride; Benzene-1,4-diamine Dihydrochloride; p-Aminoaniline Dihydrochloride; C.I. 76010 Dihydrochloride
EINECS	210-834-9

Quality Control

Our p-Phenylenediamine Dihydrochloride is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for pharmaceutical and industrial applications. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility (in Water)	Clear, colorless solution

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