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Technical formalin is a hydromethanol solution of formaldehyde. Technical formalin is used as a raw material for the production of plastics, paints, synthetic resins, tanning substances, insulating materials, disinfectants and medicines, textile auxiliary substances; as a dresser in agriculture, as well as for numerous organic syntheses.
Production by means of contact transformation of methanol to formaldehyde along with subsequent formaldehyde absorption by water.
|Appearance||Colorless transparent liquid. Turbidity or white sediment soluble at temperature not higher than 40°С may be formed|
|Mass share of formaldehyde, %||37,0 + 0,5|
|Mass share of methanol, %||from 4,0 to 8,0|
|Mass share of acids recalculated to formic acid, %||from 0,02 to 0,004|
|Mass share of residue after incineration, %||not exceeding 0,008|
|Mass share of iron, %||from 0,0001 to 0,0005|
Formalin is supplied in rail cars and road tankers with aluminum and stainless steel boilers.