Technical formalin GOST 1625-89
Technical formalin is used as a raw material for the production of plastics, paints, synthetic resins and glues, 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 40oС 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.