Zinc borate is an inorganic additive flame retardant, which is characterized by good thermal stability, both flame retardant and smoke suppression. It can replace antimony trioxide in some products and can also be used in conjunction with other inorganic flame retardants.

Aluminum Hydroxide (also known as: hydrated alumina, abbreviated as: ATH)
　　Molecular formula: AL(OH)3 or AL2·3H2O Molecular weight: 78

Physical properties: Magnesium hydroxide mainly has three specifications of 325 mesh, 1250 mesh, 2500 mesh, and 5000 mesh. Remarks: Surface modification treatment can be carried out according to customer requirements. Special instructions are required when ordering.

Due to its extremely low water solubility, this product is especially suitable for use as an acid source for intumescent coatings. Intumescent coatings on steel structures can meet the fire protection rating of DIN4102; it can also be used as intumescent coatings on wood or plastic.

Antimony trioxide (also referred to as antimony oxide, commonly known as antimony white)