In order to break the bonds, it requires energy levels equivalent to those used in its creation (Indiana University, n.d.). Boron trioxide is an intermediate that synthesizes glass, creating a low coefficient of thermal expansion, giving the glass substance its heat resistant property and mechanical strength attributes (University of Delaware, nd) (Glass Alliance Europe, 2012). Na2O is added to the silica and aluminum fusion mixture (reducing the energy required) to create a very durable glass, offering better chemical stability. The most common molecular bond in this list is SiO2, silicon-oxygen, a bond that has a high enthalpy of formation (contributes to the chemical stability of glass). It would take a possible bond more stable than silicon-oxygen to interfere with the compound. The majority of existing substances would not be altered when stored in the inert material, which is why they are used in the laboratory.