ZSM-99 (formerly known as Jabel 99) is a family of high surface area zeolite materials developed by Jabel BV and commercialized by DSM. It is an AFI-type zeolite with a framework density of 24 kg/m³, a crystallite size of 0.8 nm, and an external surface area of up to 350 m²/g. It has a micro/mesoporous structure and a uniform pore size distribution, which makes it ideal for molecular sieving applications such as separations, catalysis, adsorption, and others. ZSM-99 can be synthesized in many different ways to customize its properties, and is used in a wide range of industries including energy, water treatment, petrochemicals, and other specialty applications.