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Paraformaldehyde (Paraform)

Abbreviation PFA
Plant Niigata
Main Applications Coating compounds, adhesive agent, textile-processing resins, phenol resins
Existing Chemical Substance No. (9)-1941


  86%PFA 92%PFA
Chemical Formula HO(CH2O)nH
Molecular Weight n=2~100 (Melecular weight differs with number of 'n')
Appearance or other feature White, granular solid, pungent odor
Specific Gravity (true specific gravity) 1.25~1.35 1.30~1.40
Boiling Point (℃ 30mmHg) No data
Freezing Point (℃) 80~160 120~170
Flash Point (℃) Approx. 63 Approx. 93
Ignition Temperature (℃) Approx. 300
Dust Explosion: Lower Explosive Limit 40g/m3
Minimum Ignition Energy 20mJ
Solubility Hardly soluble in water, readily soluble in hot water
Highly reactive substance; mainly produces methylol and methylene compounds.

Applicable Laws

  86%PFA 92%PFA
Industrial Safety and Health Law Hazard indication required, specified type 3 chemical (as formalin)
High Pressure Gas None
Fire Service Law Specified combustible
Poisonous and Deleterious Substances Control Law Deleterious substance (when containing formaldehyde)
Law on the Prevention of Marine Pollution and Maritime Disaster
Ship Safety Law Hazardous material, Flammable materials
Civil Aeronautics Law Explosives, Flammable materials
Other Major Applicable Laws Air Pollution Control Law: specified toxic substance (as formalin)
Pharmaceutical Affairs Law: dangerous drug (designated drug)
(MGC does not directly market this chemical.)

Classification of Hazard

  86%PFA 92%PFA
Classification Release corrosive and flammable formaldehyde.
Hazardous Explosive and hazardous mixture can be formed when flammable solid or dust is dispersed into the air.
Depolymerize with temperature increase and will release flammable formaldehyde which is toxic and corrosive.
Harmful Acute toxicity of medium grade and irritates the skin and the eye. Generated formaldehyde is classified into 2A of IARC, which means it is a probable carcinogen to man, and designated R43 (skin contact may cause sensitization) according to the EEC convention.

Product Standard

  86%PFA 92%PFA
Appearance White solid
Formaldehyde Content (%) 86.0±1.0 92.0±1.0
Free Acid (% as formic acid) 0.02 or less
Ignition Residue (%) 0.01 or less
Chloride (Cl) (%) 0.002 or less
Heavy Metal (Pb) (%) 0.002 or less
Iron (Fe) (%) 0.001 or less

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