Description

o-Phenylenediamine (CAS NO 95-54-5) is a vital aromatic diamine compound that serves as a versatile building block in organic synthesis and industrial manufacturing. Its primary value lies in its bifunctional amine groups, which enable it to act as a key precursor for heterocyclic compounds, dyes, and complexing agents. This chemical is essential for industries including pharmaceuticals, agrochemicals, polymer production, and analytical chemistry, where it is used to synthesize benzimidazoles, as a curing agent for epoxy resins, and in the preparation of photographic developers and corrosion inhibitors.

Application

• Pharmaceutical Intermediate: Critical precursor for the synthesis of benzimidazole-based drugs, including anthelmintics and proton pump inhibitors.
• Dye and Pigment Manufacturing: Used in the production of oxidation hair dyes, azo dyes, and pigments for textiles and plastics.
• Polymer Industry: Functions as a curing agent and cross-linking agent for epoxy resins, enhancing thermal and chemical resistance.
• Agrochemical Synthesis: Building block for fungicides, herbicides, and other crop protection agents.
• Corrosion Inhibitor: Component in formulations that protect metals in industrial cooling systems and other applications.
• Analytical Reagent: Used as a derivatization agent in chromatography and as a reagent for the detection of specific ions and compounds.
• Photographic Developer: Employed in specific photographic development processes.
• Rubber and Vulcanization Chemicals: Used in the production of certain accelerators and antioxidants for rubber.

Basic Information

Product Name	o-Phenylenediamine
CAS No.	95-54-5
Molecular Formula	C6H8N2
Molecular Weight	108.14 g/mol
Synonyms	1,2-Diaminobenzene; 1,2-Phenylenediamine; o-Diaminobenzene; 2-Aminoaniline; OPDA; Benzene-1,2-diamine; OPD; 1,2-Benzenediamine
EINECS	202-430-6

Quality Control

Our o-Phenylenediamine is produced under strict quality management systems to ensure batch-to-batch consistency and high purity. The product undergoes rigorous analytical testing, including HPLC, GC, and titration methods, to meet exacting customer specifications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment. We adhere to relevant industry standards and can support requirements for GMP, ISO, and REACH compliance documentation.

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 light-sensitive and easily oxidized nature (store under inert atmosphere), it is recommended to keep the container under an inert gas blanket (e.g., nitrogen or argon) after opening to minimize oxidation and discoloration. Keep away from heat, sparks, open flames, and incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Light brown to brown crystalline powder or flakes
Identification (IR)	Conforms
Assay (HPLC)	≥ 99.0%
Melting Point	100 - 104 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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