What are the properties of Pyrex glass?

Chemically, Pyrex contains borosilicate and expands only about one-third as much as common glass (silicate) when heated. As a result, it is less apt to break when subjected to rapid temperature changes. It is resistant to many chemicals and is an electrical insulator.

What is the material used for Pyrex glass?

borosilicate glass
Pyrex glass is a borosilicate glass first produced by The Corning Glass Works company. It is made by heating raw materials like silica sand and boric oxide to extremely high temperatures for extended periods of time. The molten material is then processed into different types of glassware.

Is Pyrex glass chemical free?

For example, popular Pyrex glass storage containers and glass baking dishes are made from soda lime glass. World Kitchen acquired Pyrex in 1998. And that is when World Kitchen started making Pyrex lead free glassware from soda lime, not borosilicate.

What is the specific heat for Pyrex glass?

750 J/kg-K

Is it safe to heat sealed Pyrex glass?

Although PYREX® and VYCOR® products can take extreme temperatures, always use caution. Do not heat glassware that is etched, cracked, chipped, nicked, or scratched. It is more prone to break. Glassware with thick walls, such as bottles and jars, should not be heated over a direct flame or comparable heat source.

Is borosilicate glass better than tempered glass?

Although borosilicate glass is more resistant to thermal shock than tempered glass, under sufficiently extreme temperature changes it can still break (more on this below); it’s also more likely than tempered glass to break if you drop it.

Is Pyrex glass safe for health?

The safety concerns of most types of cookware are based on some pretty thin evidence. For everyday cooking, very little evidence actually suggests that metal or enameled pans are dangerous to health. And glass/Pyrex and clay cookware is almost certainly safe.

What material has the highest specific heat?

Water
Water has the highest specific heat capacity of any liquid. Specific heat is defined as the amount of heat one gram of a substance must absorb or lose to change its temperature by one degree Celsius.

What are the properties of Pyrex 7740 glass?

7740 Pyrex Glass Pyrex 7740 glass is Corning’s trade name borosilicate glass. Because of its low coefficient of thermal expansion, the material is useful in high temperature applications, and is also heat shock resistant. 7740 Pyrex glass is also resistant to acid and has high optical transmission over a wide wavelength range.

What kind of glass is used in Pyrex glasses?

Introduction Most PYREX glassware is made from Code 7740 PYREX borosilicate glass, the most widely known of Corning’s family of low expansion Type 1, Class A borosilicate glasses (ASTM E438 Standard Specification for Glasses in Laboratory Apparatus). It comes closest to being the ideal glass for most laboratory applications.

How is the refractive index of Pyrex determined?

Refractive Index 1.474 @ Sodium D Line 490°C (Extreme Service) Temperature Limits 230°C (Normal Service) Maximum Thermal Shock 160°C 1. Thick-walled glassware, such as bottles, jars and desiccators, should notbe heated over a flame, a hot plate, or other comparable source of heat. 2. Do not use hydrofluoric or hot phosphoric acid in glass. 3.

What kind of glass is Pyrex low actinic made of?

PYREX Low Actinic Labware was originally developed for work in the vitamin field, but it has found other uses in applications with chemicals sensitive to light in the 300o to 500nm range. PYREXPLUS glassware is made from Code 7740 borosilicate glass to which is added a tough transparent polyvinylchloride coating.