Melamine cyanurate, an organic crystalline complex was, synthesized by evaporation of an aqueous solution containing equimolar quantities of melamine and cyanuric acid. The synthesized compound has been subjected to various characterizations like Powder XRD, FT-IR, TG-DTG, SEM, and SHG. The presence of sharp diffraction peaks in the XRD confirms that the products are highly crystalline. The average particle size was calculated using the Debye-Scherrer formula, and it was found to be 3.067？μm. Thermal behavior of the grown crystal has been studied by TG-DTG analysis. From TG-DTG, it is found that the title crystal possesses good thermal stability. The activation energy was calculated using the Broido, Coats-Redfern, and Horowitz-Metzger methods. A sharp peak exothermic peak at 405.40°C was assigned as the melting point of the title material. SEM reveals the morphology of the synthesized salt. No detectable signal was observed during the Kurtz-Perry technique. 1. Introduction The rapid growth in material and processing technology makes it essential for its use in various industrial applications. Cyanuric acid which is also known as triazinetriol or trihydroxy cyaniding is a polymer of cyanic acid and arises by dry heating of urea. The organic derivatives of cyanuric acid find wide industrial applications today. The composition of cyanurates includes the s-triazine ring formed as a result of trimerization of the cyanato groups. The cyanuric acid derivatives containing the s-triazine ring (C3N3) are considered to be promising compounds for the synthesis of complexes [1]. The strong interaction of the π electrons of the cyanuric acid with the unshared electron pair of the amine nitrogen atom imparts basic properties to the melamine amino groups. Two forms of hydrogen bonding between melamine and cyanuric acid are suggested with a planar structure [2, 3]. Flame retardancy is one of the important properties in industrial application. Melamine cyanurate offers better thermal stability (up to 377°C) than pure melamine. This helps in polymer processing steps. Both melamine and cyanuric acid have got several industrial applications [4]. Melamine cyanurate is particularly effective in improving fire safety of nitrogen-based polymers, such as polyamides (nylons) and thermoplastics (polyurethane). It can be used in epoxy polymers and in a variety of other substrates. These complexes are very promising light-emitting materials because of their good thermal stability [5]. The thermochemical properties of cyanuric acid were characterized using mass spectrometry
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