Glass hydrochloric acid attack

Since iodine monochloride attacks cork and rubber, the use of an all-glass apparatus is recommended. If it should come into contact with the skin, an elective antidote is dilute hydrochloric acid (1 1). 

Care must be taken with both sintered glass and porous base crucibles to avoid attempting the filtration of materials that may clog the filter plate. A new crucible should be washed with concentrated hydrochloric acid and then with distilled water. The crucibles are chemically inert and are resistant to all solutions which do not attack silica they are attacked by hydrofluoric acid, fluorides, and strongly alkaline solutions. 

The physical properties of tantalum are similar to those of mild steel, with the exception that its melting point (2996°C) is much higher. It is ordinarily used in the pure form, and it is readily fabricated into many different shapes. The corrosion-resistance properties of tantalum resemble those of glass. The metal is attacked by hydrofluoric acid, by hot concentrated alkalies, and by materials containing free sulfur trioxide. It is resistant to all other acids and is often used for equipment involving contact with hydrochloric acid. 

The reaction of acids with glass may be either a leaching process or a complete dissolution process. Acids such as hydrofluoric acid attack silica glasses by dissolving the silica network. Other acids such as hydrochloric acid or nitric acid may react by dissolving certain glasses. However, the reaction mechanism is by selective extraction of alkali and the substitution of protons in a diffusion-controlled process. 

BROMOFLUOROFORM (75-63-8) Can react violently with barium, sodium, and potassium chemically active metals powdered aluminum. Contact with moisture forms hydrofluoric acid. Attacks glass, ceramics, and some plastics, rubber, and coatings in the presence of moisture. Undergoes thermal decomposition when exposed to flame or red-hot surfaces Hydrofluoric and hydrochloric acid, and smaller amounts of phosgene and carbonyl fluoride are formed. 

---