Propylene glycol alginate (PGA) is an emulsifier, stabilizer, and thickener used in food products. It is a food additive with E number E405. Chemically, propylene glycol alginate is an ester of alginic acid, which is derived from kelp. Some of the carboxyl groups are esterified with propylene glycol, some are neutralized with an appropriate alkali, and some remain free.[1]
| Names | |
|---|---|
| Other names
Hydroxypropyl alginate, | |
| Identifiers | |
| ChemSpider |
|
| ECHA InfoCard | 100.123.773 
|
| EC Number |
|
| E number | E405 (thickeners, ...) |
PubChem CID |
|
| UNII | |
CompTox Dashboard (EPA) |
|
| Properties | |
| Molar mass | 234.21 per structural unit (theoretical) |
| Appearance | white to yellowish brown filamentous, grainy, granular or powdered forms |
| Soluble | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
This article is about the food additive E405. For the Italian E405 locomotive, see FS Class E.405.
- ^ a b Propylene glycol alginate, Food and Agriculture Organization of the United Nations
- What is the "propylene glycol alginate" found in salad dressings? at The Straight Dope