Formaldehyde – product qualities

Product qualities

Quality of the products obtained in the standard plants:

 

1. The 37 % aqueous solution has following characteristics:

formaldehyde
37 % b.w.
methanol
less than 0.8 % b.w.
acidity (as formic acid)
less than 0.03 % b.w.
iron
less than 0.5 ppm
appearance
clear, colorless liquid

2. The medium concentration aqueous solution has following characteristics:

formaldehyde
45 % b.w.
methanol
less than 1 % b.w.
acidity (as formic acid)
less than 0.04 % b.w.
iron
less than 0.5 ppm
appearance
clear or slightly haze, colorless liquid

3. The urea stabilized solution has following characteristics:

formaldehyde
49 % to 59 % b.w.
urea
21 % to 26 % b.w.
water
the balance
pH
8 – 8.5
viscosity at 20 °C
10-50 cP
density at 20 °C
1.25 – 1.29 Kg/lt
appearance
clear to yellowish liquid
stability at temperature below 50°C
beyond 3 months