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.
1 The ammonium ion (NH 4 +) is an example of a polyatomic cation. 2  Hydrogen can also form a cation, H + , in which case the name hydrogen is used in naming. 3  For metals that have only one possible charge (valency) the name of the metal is used.