Methacrylic Acid (MAA)

MAA (methacrylic acid, CAS 79-41-4) is an unsaturated carboxylic acid and polymer monomer. It is used in the production of acrylic resins and PMMA, paints and coatings, adhesives, ion exchange resins, superabsorbent polymers and surfactants.

MAA is a monomer prone to spontaneous polymerization, so it is stabilized with 100-200 ppm of MEHQ inhibitor. To prevent polymerization it is kept cool (<25°C), away from heat and oxidizers, with an oxygen-containing headspace maintained. For this reason it is transported in stabilized form under UN 2531.

MAA is stored cool (<25°C) in inhibited (MEHQ) form, away from heat and oxidizers, with an oxygen-containing headspace maintained to prevent polymerization. Its shelf life is 6 months. It is supplied in drums or IBCs, with bulk available on request.

MAA has a minimum purity of 99.0%. Typical values are moisture max 0.05%, colour (Hazen) max 20, acid value 645-655 mgKOH/g, free polymer max 0.10% and MEHQ inhibitor 100-200 ppm. The full specification and a certificate of analysis (CoA) are provided by KORKİMYA on request.