Home - Aluminium Hydroxide (ATH) Product Portfolio | RBH Ltd Aluminium Hydroxide (ATH) High purity aluminium hydroxide flame retardant and thermal stabiliser offering non-halogen performance, smoke suppression and multifunctional filler behaviour across engineering polymers, elastomers, cables, coatings and construction applications. CAS NUMBER: 21645-51-2 Enquire Now Names Aluminium Hydroxide|ATH|Hydrated Aluminium Oxide Chemical formula Al(OH)₃ Product Overview Aluminium Hydroxide (ATH) is a widely used non-halogen flame retardant and multifunctional mineral additive derived from high purity hydrated aluminium oxide. Its dual performance as a flame retardant and smoke suppressant agent makes it a favoured choice for demanding industrial and polymer systems requiring regulatory compliance, low smoke generation and thermal stability without halogen content. ATH decomposes endothermically at elevated temperatures, releasing water vapour which cools the material and dilutes combustible gases, contributing to flame retardancy. Its high thermal stability, high char yield and synergistic behaviour with smoke suppressants and other additives extend utility across engineering plastics, elastomers, coatings, construction membranes, cables and wire systems. Beyond fire performance, ATH also serves as a functional filler, offering high whiteness, good dispersion behaviour and reinforcement support in formulated systems. Grades are available in a range of particle sizes and surface characteristics to support targeted performance in flame retardant composites, PVC and thermoplastic compounds, silicone elastomers, rubber and high performance coatings. Technical Profile Technical Profile Key Industries Packaging & Availability Technical Profile of Aluminium Hydroxide (ATH) Molar Weight 78.00 g/mol Melting Point 200 °C (decomposes) Boiling Point Not applicable Flash Point Non combustible Form Fine white powder Key Industries of Aluminium Hydroxide (ATH) Industries served by this product. Adhesives, Sealants & Construction RBH supplies specialist raw materials for adhesives, sealants, and construction applications, supporting structural, functional, and laminating systems. Our market-driven approach combines high performance materials with technical expertise to address complex formulation challenges and evolving industry requirements. find out more Coatings RBH supplies specialist raw materials for decorative, industrial, powder, and ink coating systems, supporting consistent formulation and dependable performance. Our portfolio includes functional minerals, additives, and base materials designed to meet the technical demands of modern coating manufacture across a wide range of applications. find out more Composites RBH supplies specialist raw materials for composite applications, supporting high-performance, lightweight solutions across a wide range of industries. Our market-led approach combines trusted global supply with technical expertise to meet the evolving demands of modern composite manufacture. find out more Environmental RBH supplies functional materials and specialist chemicals for environmental applications including air and gas treatment, water purification, wastewater treatment, odour control, and filtration systems. Our solutions support performance, compliance, and process efficiency in environmental processes. find out more Lubricants & Oils RBH supplies a portfolio of functional additives and performance materials for lubricants and oils, helping formulators enhance product stability, friction control, and thermal performance across industrial and automotive applications. Our specialist materials support reliable, high-performance lubricant formulations that meet evolving regulatory and market requirements. find out more Refractories RBH supplies high quality minerals and specialist raw materials for refractory formulations, supporting thermal stability, durability, and process reliability in high temperature applications across a wide range of industrial applications. find out more Plastics & Thermoplastics RBH supplies specialist additives and mineral fillers for thermoplastic applications, supporting performance, protection, and process efficiency across a wide range of plastic formulations. find out more Rubber RBH supplies specialist raw materials and additives for rubber formulations, supporting performance, processing efficiency, and durability across a wide range of elastomer applications. find out more Packaging & Availability Available in multiple packaging formats to suit your processing needs, supplied under ISO 9001 quality management systems. Contact RBH for regional stock or customised packing options. 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