Difference between revisions of "Sodium acetylsalicylate"
| Line 51: | Line 51: | ||
| BoilingPtC = | | BoilingPtC = | ||
| BoilingPt_ref = | | BoilingPt_ref = | ||
| − | | BoilingPt_notes = | + | | BoilingPt_notes = Decomposes |
| Density = | | Density = | ||
| Formula = C<sub>9</sub>H<sub>7</sub>O<sub>4</sub>Na | | Formula = C<sub>9</sub>H<sub>7</sub>O<sub>4</sub>Na | ||
| Line 60: | Line 60: | ||
| MeltingPtC = | | MeltingPtC = | ||
| MeltingPt_ref = | | MeltingPt_ref = | ||
| − | | MeltingPt_notes = | + | | MeltingPt_notes = Decomposes |
| + | | Odor = Odorless | ||
| pKa = | | pKa = | ||
| pKb = | | pKb = | ||
| Solubility = Soluble | | Solubility = Soluble | ||
| − | | SolubleOther = | + | | SolubleOther = Insoluble in [[diethyl ether]] |
| Solvent = | | Solvent = | ||
| − | | VaporPressure = | + | | VaporPressure = ~ 0 mmHg |
}} | }} | ||
| Section3 = {{Chembox Structure | | Section3 = {{Chembox Structure | ||
| Line 89: | Line 90: | ||
| AutoignitionPt = | | AutoignitionPt = | ||
| ExploLimits = | | ExploLimits = | ||
| − | | ExternalMSDS = | + | | ExternalMSDS = None |
| FlashPt = | | FlashPt = | ||
| LD50 = | | LD50 = | ||
| LC50 = | | LC50 = | ||
| − | | MainHazards = | + | | MainHazards = Irritant |
| NFPA-F = | | NFPA-F = | ||
| NFPA-H = | | NFPA-H = | ||
Latest revision as of 21:02, 30 June 2017
| Names | |
|---|---|
| IUPAC name
Sodium acetylsalicylate
| |
| Other names
Aspirin sodium
Sodium aspirinate Sodium O-acetylsalicylate Sodium aspirin | |
| Properties | |
| C9H7O4Na | |
| Molar mass | 202.141 g/mol |
| Appearance | White solid |
| Odor | Odorless |
| Melting point | Decomposes |
| Boiling point | Decomposes |
| Soluble | |
| Solubility | Insoluble in diethyl ether |
| Vapor pressure | ~ 0 mmHg |
| Hazards | |
| Safety data sheet | None |
| Related compounds | |
| Related compounds
|
Salicylic acid |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Sodium acetylsalicylate, also known as sodium aspirinate, is the sodium salt of acetylsalicylic acid. It is an easy-to-make compound used in the production of other acetylsalicylate salts.
Contents
Properties
Chemical
Sodium acetylsalicylate can be added to solutions of metal ions to precipitate insoluble acetylsalicylate salts, such as copper(II) acetylsalicylate.
Physical
Unlike aspirin itself, sodium acetylsalicylate is soluble in water.
Availability
Sodium acetylsalicylate is not a very common compound to be found outside of a lab. It is, however, easily synthesized from aspirin.
Preparation
Sodium aspirinate can be produced by adding an excess of pure acetylsalicylic acid to a solution of sodium carbonate. Sodium hydroxide cannot be used as the base as it will cause hydrolysis of the acetylsalicylic acid into other products. Because sodium acetylsalicylate is much more water-soluble than aspirin itself, excess aspirin can be crystallized out by cooling the solution.
Projects
- Copper(II) aspirinate synthesis
Handling
Safety
Sodium aspirinate is toxic if ingested in large quantities.
Storage
In closed containers, best away from moisture and air.
Disposal
Can be safely poured down the drain, with lots of water.
