Sodium 4- (methoxycarbonyl) phenate
Structural formula | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
|||||||||||||||||||
General | |||||||||||||||||||
Surname | Sodium 4- (methoxycarbonyl) phenate | ||||||||||||||||||
other names | |||||||||||||||||||
Molecular formula | C 8 H 7 NaO 3 | ||||||||||||||||||
Brief description |
white, almost odorless solid |
||||||||||||||||||
External identifiers / databases | |||||||||||||||||||
|
|||||||||||||||||||
properties | |||||||||||||||||||
Molar mass | 174.13 g mol −1 | ||||||||||||||||||
Physical state |
firmly |
||||||||||||||||||
density |
1.42 g cm −3 |
||||||||||||||||||
solubility |
|
||||||||||||||||||
safety instructions | |||||||||||||||||||
|
|||||||||||||||||||
Toxicological data | |||||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Sodium 4- (methoxycarbonyl) phenolate ( sodium methyl paraben ) is a chemical compound from the group of substituted phenolates and carboxylic acid esters . It is a paraben derivative , more precisely the sodium salt of methyl paraben .
Extraction and presentation
For the synthesis of sodium 4- (methoxycarbonyl) phenolate, potassium salicylate is heated to 215 to 220 ° C in air or under a carbon dioxide atmosphere. The resulting p-hydroxybenzoic acid is esterified with methanol under sulfuric acid catalysis and converted into the sodium salt with a base such as an alkali hydroxide or phenolate.
properties
Sodium 4- (methoxycarbonyl) phenolate is a flammable, difficult to ignite, crystalline, white, almost odorless solid that is easily soluble in water. It is hygroscopic and decomposes when heated above 313 ° C.
use
Sodium 4- (methoxycarbonyl) phenolate is used to preserve cosmetics and food, and in industry to preserve technical products. In the additive approval regulation it is listed under E 219.
Individual evidence
- ↑ Entry on SODIUM METHYLPARABEN in the CosIng database of the EU Commission, accessed on December 28, 2019.
- ↑ a b c d e f g Entry on sodium 4- (methoxycarbonyl) phenolate in the GESTIS substance database of the IFA , accessed on December 10, 2019(JavaScript required) .
- ↑ a b c d Franz v. Bruchhausen, Siegfried Ebel, Eberhard Hackenthal, Ulrike Holzgrabe: Hager's Handbook of Pharmaceutical Practice, Volume 5: Substances LZ . Springer-Verlag, 2013, ISBN 978-3-642-58388-9 , pp. 162 ( limited preview in Google Book search).
- ↑ a b European Pharmacopoeia, 8th edition, Grundwerk 2014, p. 4256.
- ↑ Data sheet sodium 4- (methoxycarbonyl) phenolate (PDF) from Merck , accessed December 10, 2019.
- ↑ Additive Admission Ordinance, Annex 5