Formaldehydhalter

Formaldehydhalter is a container or device used to hold formaldehyde, a volatile and toxic chemical widely used as a fixative in biology, pathology, and chemistry. In practice, a formaldehydhalter can refer to a storage vessel for formaldehyde solutions (often formalin, about 37% formaldehyde in water, sometimes stabilized with methanol) or to a component of a fixation system that allows safe, controlled exposure of specimens to formaldehyde.

Common designs include sealed glass flasks with vented closures and plastic bottles made from materials compatible with formaldehyde, such as HDPE or certain fluoropolymers. The goal is to minimize volatilization and leakage while enabling safe handling and disposal. Metal parts are minimized or specially treated to resist corrosion.

Materials selection emphasizes compatibility with formaldehyde and stabilizers, with inert gaskets and seals to prevent permeation. Construction should support safe pouring, labeling, and, where applicable, venting to limit pressure buildup in closed systems.

Safety and handling considerations are essential. Formaldehyde is a known irritant and carcinogen; use should occur in a fume hood or well-ventilated area, with appropriate labeling, secondary containment, and spill containment measures. Store in a cool, dry, well-ventilated location away from heat and incompatible substances, and keep out of reach of unauthorized personnel. Regular inspection for cracks, leaks, and degraded seals is advised, and compliance with applicable regulations and GHS labeling is required.

See also: Formalin, tissue fixation, chemical storage safety, hazardous materials handling.