|
Appearance
|
Clear colorless solution
|
|
Assay (acidimetric, after oxidation)
|
Min 20.0%
|
|
Free acid (as formic acid)
|
Max 0.03%
|
|
Density (at 20°C)
|
1.034 - 1.044 g/mL
|
|
Chloride (Cl)
|
Max. 0.0001%
|
|
Sulphate (SO4)
|
Max. 0.002%
|
|
Heavy metal (as Pb)
|
Max. 0.0002%
|
|
Iron (Fe)
|
Max. 0.0001%
|
|
Sulphated ash
|
Max 0.002%
|