Pyrex® Brand Labware
Of the hundreds of commercial glasses produced, Code No. 7740 borosilicate glass comes closest to being the ideal glass for most laboratory applications.
With proper care, it will withstand nearly all temperatures used in normal laboratory use. It is highly resistant to chemical attack. Its low coefficient of expansion allows it to be manufactured with heavy walls, giving it mechanical strength, while retaining reasonable heat resistance. And, it is a glass that can be fabricated more easily than most other glasses, thus making it more economical.
Corning Trademark: PYREX®
Borosilicate -- Low Expansion -- Type 1 Glass
Type 1, Class A Borosilicate conforming to federal specification DD-G-54 lb and ASTM E-438. Also meets the U.S. Pharmacopoeia specs for Type 1 Borosilicate Glass.
Designed for use in all products requiring very high resistance to strong acids, alkalis and products intended for use in heat applications such as autoclaves, hot plates, and open flame.
Beakers, burets, bottles, centrifuge tubes, condensers, cylinders, desiccators, dishes, flasks, fritted ware, funnels, ground joints, jars stopcocks, tubing and other assorted products.
Thick-walled ware, such as bottles, jars and desiccators, should not be heated over a flame, a hot plate, or other comparable source of heat.
Do not use hydrofluoric or hot phosphoric acid in glass.
Do not use scratched or abraded glassware.
Hot alkalis will etch glass.
|Coeff. of Exp.
Max. Thermal Shock
|32.5 X 10-7cm/cm/°C
76 X 103 Kg/mm2
1.474 @ Sodium D Line