Why is Hydrogen Peroxide Stored in Plastic Containers

When two molecules of hydrogen and two molecules of oxygen are combined, what do you get? H₂O₂, also known as hydrogen peroxide, is the result. Peroxide is clear and colourless, and it kills a wide range of bacteria when poured over an open wound. When properly stored, it’s also a very stable chemical. That’s why hydrogen peroxide comes in a brown plastic bottle when you buy it.

Hydrogen peroxide, like many other chemical substances, degrades over time. Despite its great stability, the solution can begin to disintegrate when exposed to light and heat. Your medicine cabinet’s dark container is a deterrent to those two catalysts. The brown bottle’s hue prevents light from penetrating it, preventing oxidation and a temperature rise.

Storage of Hydrogen Peroxide

Hydrogen peroxide decomposes continually into water and oxygen, even at low concentrations. This rate is very low while storing hydrogen peroxide in certified materials and free of impurities.

• However, excessive gas pressure may develop if the oxygen pressure is not alleviated.
• Hydrogen peroxide should be stored in its original container until it is needed.
• Only approved, dedicated equipment composed of appropriate materials may be used for handling and transferring.
• After drawing hydrogen peroxide from a storage container, it must not be returned because it could be contaminated.
• Keep in mind that the main danger of hydrogen peroxide is contamination with organic or aqueous molecules.

Exposure to Heat

• Hydrogen peroxide breakdown is exothermic, and the rate of decomposition increases as the temperature rises.
• Suppose the heat generated by decomposition is not removed at the same rate as produced (via heat loss to the environment or cooling). In that case, the temperature will rise, and the decomposition rate will accelerate.
• This occurrence can cause a self-accelerating decomposition, leading to highly rapid decomposition or “boil off” in severely contaminated situations.

Circulation and Ventilation

• Even after final decomposition, liquid water is still present in solutions up to 64% concentration.
• As a result, the final temperature of decomposition cannot be higher than the boiling point of water.

Storage Container Materials

• Plastic tanks may hold up to 50% hydrogen peroxide if manufactured of the appropriate polymeric material.
• Polypropylene, polytetrafluoroethylene, polyvinylidene fluoride (Solvay SOLEF®) and VITON® (a copolymer of vinylidene fluoride and hexafluoropropylene) are examples of plastics.
• Hydrogen peroxide uses are not limited to industries, including food, papermaking, textiles, and electronics.
• Both white chemical porcelain and borosilicate glass can withstand high concentrations of hydrogen peroxide and are commonly used in small-scale laboratory apparatus.
• Light can cause hydrogen peroxide to decompose photochemically.
• Amber-coloured glass containers help high-concentration H₂O₂ solutions last longer.

Peroxide heats up when it decomposes. As a result, the rate of breakdown of the chemical accelerates. The rate of disintegration roughly doubles for every ten degrees Celsius increase in temperature. Furthermore, if a contaminant, such as dust, silver, lead or another metal, is introduced into the solution, it can cause a fire, even though the solution is not explosive.

If you consider storing hydrogen peroxide, it must be treated with caution by those in the industry. If the solution is in a closed system, the pressure might build up and cause an explosion. The good news is that the bottle of peroxide in your medicine cabinet only contains a 3% solution, which is much lower than the 35% used in the food business.

Oxidiser Rating of Hydrogen Peroxide

H₂O₂ is referred to as high-test peroxide when its concentration exceeds 70%. (HTTP). Currently, rocket propellants with concentrations of H₂O₂ more than 91% are employed. H₂O ₂ is classified as a Class 4 Oxidizers, Corrosive, and Class 3 Unstable (reactive) material at these concentrations.

Disinfecting and Cleaning Plastic

Soak the plastic container in a bleach-water solution containing about 5 to 10% bleach for thorough plastic sterilisation. Because bleach disinfects quickly, the soaking time is small. Heat the plastic by rinsing it in a hot dishwasher, but a microwave is more efficient.

Conclusion

Hydrogen peroxide is a chemical with a strong reactivity. Storing hydrogen peroxide is highly unstable and slowly decomposes. As a result, hydrogen peroxide should be stored in amber-coloured or opaque bottles that allow little or no light to penetrate through. With a molecular formula of 1, hydrogen peroxide is a highly reactive chemical molecule. It’s a very pale blue liquid that’s somewhat denser than liquid water in its purest state.