1,3-Phenylenediamine TCI P1911

1,3-Phenylenediamine from TCI (product code P1911), also known as m-phenylenediamine, is an aromatic amine with two amino groups at the meta positions of a benzene ring. It is an important chemical intermediate in both industry and research. In the laboratory, 1,3-phenylenediamine is used as a monomer for aromatic polyamides, as a curing agent for epoxy resins, and as a starting material for dyes. Today its most prominent use is as the main monomer for thin-film composite polyamide membranes, so it is a standard non-heterocyclic building block for polymer and materials chemistry.

Its two amino groups are equally reactive, so the molecule can react with two partner molecules at once. This bifunctional character suits it well to condensation polymerization and to building crosslinked polymer networks. Because the two amino groups sit in the meta position, the polymer chains it forms are bent, which gives the resulting materials different properties from those made with the para isomer. The compound reacts readily with acyl chlorides, isocyanates, and epoxide groups, so researchers can use it in many synthetic routes. Researchers working on polymer design, resin formulation, and dye synthesis value this combination of reactivity and structural control.

In Indonesia, the need for clean water treatment and desalination has driven steady growth in membrane research. University and research institute laboratories working on separation technology often use 1,3-phenylenediamine to prepare polyamide selective layers by reacting it with acyl chloride partners. Materials science and polymer chemistry groups also use it to study aromatic polyamides and epoxy curing systems, and organic chemistry laboratories use it as a starting material for dye synthesis.

• Thin-film composite polyamide membranes: as the main diamine monomer, its two reactive amino groups react with acyl chlorides to form the crosslinked polyamide selective layer used in water treatment and desalination research.
• Aromatic polyamide synthesis: its bifunctional structure allows condensation polymerization, and the meta arrangement of the amino groups produces bent polymer chains with properties different from those made with para isomers.
• Epoxy resin curing: both amino groups react readily with epoxide groups, so the compound acts as a curing agent that builds a crosslinked network in resin formulation studies.
• Dye synthesis: as an aromatic diamine, it serves as a starting material for dyes, giving chemists a versatile aromatic core with two reactive sites for further derivatization.
• Isocyanate-based polymer research: its amino groups react readily with isocyanates, so researchers can use it to build polymer structures and to study reactions between diamines and isocyanates in materials chemistry.

• Synonym: m-Phenylenediamine

As an aromatic amine, 1,3-phenylenediamine is sensitive to air and light, and its color may darken if it is stored improperly. Keep it in a tightly closed original container, protected from light, in a cool, dry, well-ventilated place. Reseal the container promptly after each use to limit air exposure. Keep it away from incompatible reactive substances such as acyl chlorides, isocyanates, and epoxides unless it is being used in a controlled reaction. Handle the material in a fume hood while wearing suitable gloves, safety glasses, and a lab coat. Avoid skin contact and inhaling dust, and always consult the supplier's Safety Data Sheet before use.

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