The 500mL wide-mouth ultra-clean PE bottle uses a dual-layer HDPE structure, and the brown body provides inherent light protection against light-induced degradation of sensitive high-purity reagents. The wide mouth eases filling and sampling of powders and high-viscosity materials, avoiding the contamination hazards of a narrow neck. The entire production process takes place in a clean environment, controlling particle and metal ion leaching at the source and preserving the reagent's original purity as far as possible. Suited to laboratory dispensing and semiconductor high-purity chemical storage, balancing ease of use with stringent process cleanliness demands.