|appearance:||free flowing, dustless, white flakes, with typical pungent formaldehyde odor|
|assay:||90 % +/- 1 %|
(as formic acid):
|less than 0.1 %|
|iron:||less than 0.0003 %|
|ash:||less than 0.04 %|
|particle size:||most of the flakes with dimensions 10 x 20 mm, thickness 1 to 3 mm.|
As by-product, is obtained in the plant a diluted formaldehyde solution, with assay 15 to 25 %.