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Particle size generally refers to the linear scale of a single particle in a powder (often expressed as equivalent diameter, in micrometers (µm) or nanometers (nm)). Since actual powders are aggregates of numerous particles, their size is often not uniform.

Whiteness is a numerical indicator of how close an object's surface color is to pure white, reflecting its ability to reflect visible light (especially the 457nm blue light band). An ideal pure white object should reflect light uniformly across the entire wavelength range, but actual materials exhibit different levels of whiteness due to variations in their absorption and reflection characteristics.

Among the many flame retardants, magnesium hydroxide stands out with its unique combination of properties, hailed as the "Green Guardian" in the field of flame retardancy.

Magnesium hydroxide (MDH) has emerged as a significant and environmentally friendly filler-type flame retardant, gaining prominence as industries worldwide shift towards halogen-free materials due to stringent safety and environmental regulations. Its mechanism and advantages make it a superior choice in many polymer applications compared to traditional options like aluminum hydroxide (ATH).

Magnesium hydroxide, as an important alkaline compound, plays a key role in various industrial and daily life fields, with applications spanning wastewater treatment, medicine, textiles, agriculture, and food processing, among others.