Attackers have used adhesives, oils, caustic soda, ammonia and, most commonly, all kinds of acid.
He said that at some point before it was seized by coalition forces, the van had been scrubbed with "a very caustic substance," perhaps ammonia, and had been painted.
NK was tested for the presence of reducing sugars, alkaloids, anthraquinones, quinones, protein and tannins by reacting with Fehling's solution A and B, acetic acid followed by Draggendroff's reagent, aqueous ammonia or caustic soda, sodium hydroxide, few drops of biuret reagent and basic lead acetate solution respectively.
Bichromate of potash, iron salts, ammonia and caustic soda are chemicals most often used to color wood.
It is the main contributor to the build-up of nitrogen and phosphorus in the world's soils, producing too much ammonia (which is caustic), nitrous oxide (a greenhouse gas) and dead zones in oceans (the result of excess phosphorus).A fifth of the world's pasture has been spoilt by overgrazing.
Ammonia is a caustic substance that should be treated with caution, but it does come closer than any other method to creating the green brown appearance of naturally aged brass.
Health officials have said the water in three incidents was contaminated, with ammonia, sodium hydroxide (or caustic soda) and possibly other substances.
One of the caustic agents contained in urine is ammonia.
Where ammonia is required for acid neutralization in DA pretreatment, caustic soda is used to remove accumulated ammonium salts as sodium nitrate; this is modeled as brine waste and sent to landfill [ 40].
