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.
The ammonium ion is a positively charged ion or cation and has the chemical formula, NH 4 +. Ammonium salts are commonly used in fertilizers. Examples of compounds containing the ammonium ion include, ammonium nitrate, NH 4 NO 3 and ammonium sulfate, (NH 4) 2 SO 4.All ammonium salts are soluble in water and dissociate or break down to produce aqueous ammonium ions.he ammonium ion is formed by the neutralization of the base ammonia, NH 3 with and acid. NH 3 + HNO 3 4 NO 3. NH 3 + H 2 SO 4 4) 2 SO 4. The ammonium ion has one co-ordinate covalent bond which involves the nitrogen atom donating two electrons in one of the N-H bonds.