Laboratory glassware refers to a variety of equipment in scientific work traditionally made of glass. Glass can be blown, bent, cut, molded, formed into many sizes and shapes, and is therefore common in chemistry, biology, and analytical laboratories. Many laboratories have training programs to demonstrate how glassware is used and to alert first time users to the safety hazards involved with using glassware.
Laboratory glassware may be made from several types of glass, each with different capabilities and used for different purposes. Borosilicate glass is transparent and can withstand thermal stress. Quartz glass can withstand very high temperatures and is transparent in certain parts of the electromagnetic spectrum. Darkened brown or amber (actinic) glass can block ultraviolet and infrared radiation. Heavy-wall glass can withstand pressurized applications. Fritted glass is finely porous glass through which gas or liquid may pass. Coated glassware is specially treated to reduce the occurrence of breakage or failure. Silanized (siliconized) glassware is specially treated to prevent organic samples from sticking to the glass.