m-Phenylenediamine [1,3-diaminobenzene] solution I make for reverse osmosis membrane synthesis keeps changing colour, I suspect that some sort of reaction is happening that could affect the quality of the membranes. Is there something like an additive that can be done to mitigate this?
m-Phenylenediamine, also called 1,3-diaminobenzene, is an organic compound with the formula C6H4(NH2)2. It is an isomer of o-phenylenediamine and p-phenylenediamine. It is a colourless solid.m-Phenylenediamine is produced by hydrogenation of 1,3-dinitrobenzene. The dinitrobenzene is prepared by dinitration of benzene.m-Phenylenediamine is used in the preparation of various polymers including aramid fibers, epoxy resins, wire enamel coatings and polyurea elastomers. Other uses for m-phenylenediamine include as an accelerator for adhesive resins, and as a component of dyes for leather and textiles. Basic Brown 1 (Bismarck Brown), Basic Orange 2, Direct Black 38, and Developed Black BH. In hair-dying, m-phenylenediamine is a "coupling agent", used to produce blue colors
Vapor-phase 1,3-benzenediamine is rapidly degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals (estimated half-life 1.9 hours)
Geoff Pain , Thank you for your answer Dr. Pain, based on this, is there an additive I can add to bind the hydroxyls or just do the reaction in the dark?
I would think it best to try the reaction shielded from light, perhaps doing 2 experiments at the same time, one shielded, the other not.
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