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Technical formalin
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
Production by means of contact transformation of methanol to formaldehyde along with subsequent formaldehyde absorption by water.
Basic physical and chemical features
| 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 |
Transportation
Formalin is supplied in rail cars and road tankers with aluminum and stainless steel boilers.