Industrial formaldehyde level 37%
1 the appearance of transparent liquid, no suspension. / The 2 density (P 20) fand ~1.114 g/cm 1.075 3 formaldehyde, e% 36.5~37.4 / 4 acidity (HCOOH) less than or equal to 0.05 / E% 5 iron, e% less than or equal to 0.0005 |
