Understanding the Pyrex Glass Tube Better
By definition, glass is an interesting material that is made of metal oxides. It is an inorganic mixture of oxides that are carefully fused together at extreme temperatures. At high temperature, glass solidifies and cools into a versatile, clear, non-crystalline and rigid material. This is how traditional glass is made.
On the other hand, there are notable differences between traditional glass and Pyrex (the special one). As you browse through glass tubes.eu, you will come across a range of Pyrex glass tubes.
Pyrex glass has a unique and a typical composition. With respect to weight, nearly 80 percent of Pyrex is silicon dioxide, 13 percent is boron dioxide and 3 percent is made of aluminum oxide. Pyrex glass is completely different from traditional glass varieties. It possesses a range of unique qualities that make it ideal for chemists, scientists, and researchers. Unique properties of Pyrex would be chemical resistance, resistance to thermal shock and low coefficient of thermal expansion. These are important benefits any lab experience can use. Most lab experiments involve direct heating. This is where test tubes, beakers, and flasks are subject to the direct flame of alcohol and gas burners. And, it is important to use equipment that can handle extreme temperatures effortlessly and smoothly.
Unique Properties of Pyrex glass tubes
#1 Chemical Abilities of the Pyrex glass tube
As mentioned previously, Pyrex glass tubes are highly resistant to harsh chemicals. It can cope with attacks from salt solutions, organic solvents, water, acids, and halogens. The only solutions that can affect the Pyrex are strong alkalines, hydrofluoric acid and concentrated phosphoric acid (preferably the hot ones). Strong alkaline solutions can result in severe corrosion. Apart from these situations, Pyrex is suitable for all kinds of lab experiments.
#2 Hydrolytic Resistance of Pyrex
It is quite important for all laboratory glassware to have hydrolytic resistance. This property is important for many chemical applications. For example, steam sterilization exposes water vapor to extreme temperatures and removes alkali ions. Pyrex test tubes are low on the metal oxide. This is why Pyrex test tubes can resist alkali attacks.
#3 Resistance to Acid
Pyrex is rich in silica. This makes Pyrex glass tubes resistant to acid attacks. More than 80-percent of Pyrex is made of silicon dioxide. This means Pyrex is remarkably resistant to strong acids. It doesn’t experience chemical corrosion. Thus, Pyrex test tubes are suitable for lab experiments involving strong acids (with few exceptions).
#4 Alkaline Resistance
Moving on, Pyrex test tubes cannot be attacked by alkaline solutions easily. When compared to traditional glasses, Pyrex is remarkably strong.
#5 Resistance to high temperatures
A key property of the Pyrex glass tube would be thermal resistance. Pyrex is known for its ability to cope up with low and high temperatures. This is one of its key selling features. Due to the low thermal expansion and contraction coefficient of Pyrex, temperature fluctuations don’t affect this type of glass. Pyrex glass tubes can handle sudden temperature fluctuations without cracking and breaking.
On the whole, Pyrex glass tubes play an integral role in laboratories. It would be difficult to find a lab without the Pyrex!