Monoglycerides citric acid esters

Chem. Descrip. Monoglyceride citric acid ester CAS 68990-05-6... 

Chem. Descrip. Lecithin/monoglyceride citric acid ester Uses Food emulsifier, antispattering agent for margarine Properties Powd. m.p. 55 C acid no. 20 max. iodine no. 30 sapon. no. 175-185 Incrocas 30 [Croda Inc]... 

Citric acid esters of monoglycerides (CMG) are manufactured by esterification of monoglycerides with citric acid, and the resulting product is often partially neutralized by alkali (Na salts). 

Figure 34 Monoglyceride derivatives, (a) Ethoxylated monostearate (b) succinic acid ester of monostearate (c) diacetyl tartaric acid of monostearate (d) citric acid ester of monostearate (e) lactic acid ester of monopalmitate (f) acetic acid ester of monostearate.

Esters of monoglycerides with organic acids such as acetic acid, lactic acid, diacetyltartaric acid, succinic acid and citric acid are widely used as food emulsifiers. The esters are produced in standard batch reactors normally by reacting monoglycerides with the organic acid or its anhydride. A direct esterification of fatty acids, glycerol and the organic acid is also possible for some products. 

The properties of monoglycerides can also be modified by esterification of one of the hydroxyl groups with acetic, lactic, fumaric, tartaric or citric acids. Similar emulsifiers are synthesised by reacting propylene glycol with saturated fatty acids to give a mixture of mono- and diacyl esters, which can be molecularly distilled to prepare concentrates containing about 90% propylene-glycol monostearate. 

Citric acid Na-, K-, Ca-salts, monoisopropyl ester, monoglyceride ester, triethyl ester, monostearyl ester. 

Besides the examples listed above, a wide range of other compounds with diverse properties can be envisaged using different tail groups other than natural fatty acids and monoglycerides. As an example, alkoxylated alcohols have been esterified with carboxylic acids such as citric acid with potential applications for high-viscosity surfactants in cosmetics [14]. In addition to esters, amides of carboxylic acids linked with lipophilic groups are also known from the patent literature [15]. 

Trade Names Containing Imwitor 377 Imwitor 380 Citric acid, 6-(2-hydroxydecyloxy)-2,3,4,5,6-pentahydroxyhexyl ester. See Disodium hydroxydecyl sorbitol citrate Citric acid, monoester with glycerol. See Monoglyceride citrate Citric acid monosodium saK. See Sodium citrate Citric acid, octadecyl ester. See Stearyl citrate Citric acid sodium salt. See Sodium cKrate Citric acid, tributyl ester. See Tributyl cKrate Citric acid, triisopropyl ester. See Triisopropyl citrate Citric acid, triisostearyl ester. See Triisostearyl citrate Citric acid, tripotassium salt. See Potassium citrate Citric acid, tris (2-octyldodecyl) ester. See Trioctyidodecyl citrate Citric acid trisodium saK. See Trisodium citrate... 

Esters of fatty acids, primarily stearic and palmitic, and distilled monoglycerides with lactic, tartaric, citric, succinic, and related hydroxy acids have found wide application as emulsifiers and improvers in the food industry. Sodium or calcium salts of esters of stearic acid with lactic acid [sodium stearoil-2-lactylate (SSL)]... 

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