Specification of PARAFORMALDEHYDE POWDER EX LOKAL IMPORT
Paraformaldehyde (PFA) is the smallest polyoxymethylene, formaldehyde polymerization product with a polymerization rate of 8-100 units. Paraformaldehyde usually has a slight formaldehyde odor due to decomposition. Paraformaldehyde is poly-acetal.
After the depolymerization of paraformaldehyde, the formaldehyde produced can be used as a fumigant, disinfectant, fungicide, and fixative. Polyoxymethylene with a longer chain length (high molecular weight) is used as a thermoplastic and is known as polyoxymethylene plastic (POM, Delrin). It was used in the past in Sargenti's discredited root canal treatment method. [2]
Paraformaldehyde is not a fixative; it must be depolymerized to formaldehyde in solution. In cell culture, a typical formaldehyde fixation procedure will involve using a 4% solution of formaldehyde in phosphate buffered saline (PBS) over ice for 10 minutes. In histological and pathological specimen preparation, the fixation stage is usually carried out using 10% Neutral Buffered Formalin (4% formaldehyde) for a minimum of 24 hours.
Paraformaldehyde is also used to cross-bind proteins to DNA, as is used in ChIP (chromatin immunoprecipitation) which is a technique for determining which part of DNA binds to a particular protein.
Paraformaldehyde can be used as a substitute for dilute formaldehyde to produce a resin binder, which is commonly used in conjunction with melamine, phenol or other reactive substances in the manufacture of particleboard, medium density fiberboard and plywood.
Paraformaldehyde can be used as a substitute for liquid formaldehyde to produce a resin binder, which is commonly used in conjunction with urea, melamine, phenol, resorcinol, tannins or other reagents in the manufacture of particleboard, fiberboard, and plywood.
special chemicals
