Find all of your laboratory and workplace safety supplies at Safety Emporium!
 Anesthesia |
 Glossary Index |
 Anhydrous |
| MSDS Topics |
Free Sites | FAQ's | Regulations | Glossary | Software | Suppliers |
| Books | Forum | Poll | Fun stuff | Quiz | Store | |
| Understand your MSDS with the MS-Demystifier | Search ALL our MSDS info | |||||
An anhydride is a water reactive compound that gives an acid or a base when combined with water.
Filter mixtures at constant temperature with laboratory frits and filters from Safety Emporium.
Many substances are not themselves acids or bases, but will become such when exposed to water. This does not necessarily require the addition of water (such as from a fire hose). Many anhydrides will react readily with ambient humidity and even the water present in your skin or lungs!
The reaction of anhydrides with water is often very violent and exothermic (giving off a great deal of heat energy). Some examples of anhydrides and their reaction products with water include:
See the links under Further Reading below for the preparation and reactivity of other anyhydrides.
The reaction shown in the first equation which forms sulfuric acid is one step in the reaction of sulfur oxide emissions to form "acid rain". The reaction to form acetic acid is used in certain silicone caulks, leading to the familiar smell of vinegar (vinegar is a 5% solution of acetic acid in water) while the caulk cures.
The Safety Data Sheet of n anyhdride will contain a multitude of useful information concerning the properties, use, storage, precautions, handling and more. In particular, pay attention to Section 11 (toxicological information) which will explain the signs and symptoms of exposure.
Treat anhydrides with great respect, keeping them away from water and recognizing that they can be as dangerous or corrosive as their corresponding acid or base. Always wear proper personal protective equipment, including chemical splash goggles and gloves when handling anhydrides.
Be sure you're in compliance with DOT placards and labels from Safety Emporium.
As noted above, reactions of anhydrides can often be violent and exothermic. Plan experiments and emergency procedures to deal with such situations before beginning your work.
See also: acid, base, hygroscopic, IUPAC, pH, water reactive.
Additional definitions from Google and OneLook.
Entry last updated: Monday, February 21, 2022. This page is copyright 2000-2024 by ILPI. Unauthorized duplication or posting on other web sites is expressly prohibited. Send suggestions, comments, and new entry desires (include the URL if applicable) to us by email.
Disclaimer: The information contained herein is believed to be true and accurate, however ILPI makes no guarantees concerning the veracity of any statement. Use of any information on this page is at the reader's own risk. ILPI strongly encourages the reader to consult the appropriate local, state and federal agencies concerning the matters discussed herein.