Antimony trioxide (CAS 1309-64-4)
Antimony trioxide (CAS 1309-64-4)
Antimony(III) oxide is the inorganic compound with the formula Sb2O3. It is the most important commercial compound of antimony. It is found in nature as the minerals valentinite and senarmontite. Like most polymeric oxides, Sb2O3 dissolves in aqueous solutions with hydrolysis. A mixed arsenic-antimony oxide occurs in the nature as the very rare mineral stibioclaudetite.
Antimony(III) oxide is an amphoteric oxide, it dissolves in aqueous sodium hydroxide solution to give the meta-antimonite NaSbO2, which can be isolated as the trihydrate. Antimony(III) oxide also dissolves in concentrated mineral acids to give the corresponding salts, which hydrolyzes upon dilution with water. With nitric acid, the trioxide is oxidized to antimony(V) oxide.
When heated with carbon, the oxide is reduced to antimony metal. With other reducing agents such as sodium borohydride or lithium aluminium hydride, the unstable and very toxic gas stibine is produced. When heated with potassium bitartrate, a complex salt potassium antimony tartrate, KSb(OH)2•C4H2O6 is formed.
Argan oil (CAS 223747-87-3)
Argan oil (CAS 223747-87-3)
Argan oil is a plant oil produced from the kernels of the argan tree (Argania spinosa L.).
Argan oil has a relative density at 20 °C (68 °F) ranging from 0.906 to 0.919.
Argan oil contains tocopherols (vitamin E), phenols, carotenes, squalene, and fatty acids (80% unsaturated). The main natural phenols in argan oil are caffeic acid, oleuropein, vanillic acid, tyrosol, catechol, resorcinol, (−)-epicatechin and (+)-catechin.
Depending on the extraction method, argan oil may be more resistant to oxidation than olive oil.
Ascorbyl palmitate (CAS 137-66-6)
Ascorbyl palmitate (CAS 137-66-6)
Ascorbyl palmitate is an ester formed from ascorbic acid and palmitic acid creating a fat-soluble form of vitamin C. In addition to its use as a source of vitamin C, it is also used as an antioxidant food additive (E number E304). It is approved for use as a food additive in the EU, the U.S., Canada, Australia, and New Zealand.
Ascorbyl palmitate is also marketed as “vitamin C ester”. It is synthesized by acylation vitamin C using different acyl donors.