The 40L stainless steel storage drum is designed for bulk storage needs on semiconductor mass production lines. The thickened body improves pressure resistance and resistance to deformation, suited to long-term storage of photoresists and developers in large volumes. Passivation of the inner wall forms a stable protective layer that strictly controls metal ion leaching, safeguarding electronic chemical purity from contamination at the source. The brushed matte outer surface does not easily accumulate dust, making routine cleanroom cleaning and disinfection easier. An integrated side grip with a narrow sealed opening effectively blocks light and oxygen, suited to bulk raw material transfer and storage operations in plants.