The list of deleterious materials has always remained fluid because as technology advances new products come onto the market and medical research establishes new risks to health. Clauses in contracts and appointment documents often refer to compliance with 'Good Practice in the selection of construction materials'.he list of deleterious materials has always remained fluid because as technology advances new products come onto the market and medical research establishes new risks to health. Clauses in contracts and appointment documents often refer to compliance with 'Good Practice in the selection of construction materials'.
Hydrogen peroxide is a weak acid. Generally, acids distinguishable by the hydrogen proton, while bases are generally anything with a hydroxide. For instance, hydrochloric acid, or HCl, can be distinguished by the H+ bonded with Cl-. NaOH on the other hand, is a bond between Na+ and OH-.
the strength of an acid or base is the degree of ionization in solution which in turn means the ability to give or accept protons. acetic acid is weak because only 1 in 10,000 acid molecules break up to give the H+ ion in solution. HCl is a strong acid because it completely dissociates into H+ and Cl -. likewise a weak base does not ionize fully in an aqueous solution. for example NaOH is a stronger base than diethylamine because of the degree in ionization in water to produce the OH- ion. the measure of acid and base strength is the Ka and Kb.