Dyneema Â® SK60 is the only super-fiber with a density below 1.0 (the fiber can float on water). The specific gravity of Dyneema Â® SK60 is 0.97, which is the lowest value among super fibers and is lighter than water.
Benzalkonium chloride is a quaternary ammonium compound and is used as a preservative in many ophthalmic solutions. Typically in dilutions of 0.01% or less.lkyl triethanol ammonium chloride, benzethonium chloride, CETRIMIDE (cetyltrimethylammonium bromide), DYMED and POLYQUAD are also examples of quaternary ammonium compounds that are used in ophthalmic preparations.
Â« on: September 15, 2009, 09:55:43 AM Â». We're reviewing ionic compounds, and one of the examples of an ionic compound with a polyatomic ion is NH 4 Br (ammonium bromide). I'm wondering why the NH 4 came first, because both N and H are on the nonmetal side of the periodic table.