| abstract |
Emulsions contain (a) =4% carotenoids (e.g. bixin, crocetin, crocin, xanthophyll or zeaxanthin), (b) soaps of tris(hydroxymethyl)-amino-methane (I) with 9-20 C opt. satd. fatty acids and (c) a diluent. They are produced by heating the tris soap to between 30 degrees and its m.pt mixing with and carotenoid, and adding the diluent to the warm emulsion. The diluent is pref. a second emulsifier, propylene glycol, polyethylene glycol ethyl ether and/or an aq. vitamin A dispersion. The emulsions can be used for parenteral administration of animals in order to provide a source of provitamin A. |