PARAFORMALDEHYDE

DESCRIPTION
Synonyms:  paraform, paraformaldehyde, PFA. Chemical formula: OH (CH 2 O) n H (n = 8 - 100) Release form and appearance Colorless solid, free-flowing. Supplied in the form of granules or powder. Due to partial depolymerization, it has a faint smell of formaldehyde. Production Received from an aqueous solution of formaldehyde (formalin) by vacuum evaporation to the required concentration, after which the formation of polymer flakes begins. Subsequently, the flakes are dried and crushed. Properties:

Paraformaldehyde - polyacetal with a degree of polymerisation from 8 to 100
When dissolved in water, depolymerization occurs

Main areas and methods of application
For the production of an aqueous solution of formaldehyde in case a higher formaldehyde content and a lower water content are required. Production of phenolic, melamine and urea resins. Production of ion exchange resins. As a component of hydrogen sulfide scavengers in the oil industry. As a raw material in the chemical and pharmaceutical industries. Dye production; auxiliary substances for the leather, paper and textile industries; technical preservatives, auxiliary substances for the rubber industry, herbicides. As a free-flowing additive for urea fertilizers.
SPECIFICATIONS
Index    Value
Brand    Granuform® 91    Granuform® 96
Basic substance content, wt%    89.5 - 92.5    94.5 - 96.5
Average molecular weight range    200 - 1000 g / mol
Melting range    Approx. 120 о С before depolymerization
Density at 20  О С, g / cm 3    1.3
Vapor pressure at 20  О С, hPa    1.5 - 2.0
Flash point (open crucible), О С    70
Packing:
- 25 kg
bags - 500 and 100 kg net big bags Safety rules and storage: fine paraformaldehyde dust can form explosive mixtures with air! Store in a cool, dry, well-ventilated place in a tightly closed container.