8 April 2022 Bulletin

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4,4′-methylenebis(2- chloroaniline) or MOCA, is an aromatic amine used as a curing agent in the manufacture of castable polyurethane products, with the chemical formula C13H12Cl2N2. It creates chemical reactions that bond other molecules in relatively stable complex structures and produces a tough abrasion-resistant polymer. Pure MOCA is a colourless crysalline solid, but it is usually made and used as yellow, tan, or brown pellets. If MOCA is heated above 205°C it may decompose by itself. It has no odour or taste. [1,2]

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