Dilauryl ether

Alcohol sulfates decompose at high temperature. At 100°C they lose any associated water and at 150°C thermal decomposition begins. The organic part of the molecule is completely decomposed at 285 °C. Main decomposition substances of sodium lauryl sulfate are dilauryl ether and sodium pyrosulfate [64]. 

Dilauryl ether (didodecyl ether) n. A lubricant for plastics processing. 

A new synthetic substrate (l,2 0-dilauryl-rac-glycero-3-glutaric acid-(4-methyl-resorufin)-ester), consisting of two glycerol ether and one ester bonds, has been proposed. LPS hydrolyze the latter bond in an alkaline medium to an unstable dicarbonic acid ester that spontaneously hydrolyzes to yield glutaric acid and methylresorufin this is a bluish-purple chromophore with peak absorption at 580 nm. 

Propionic acid, 3,3 -thiodi, didodecyl ester. See Dilauryl thiodipropionate Propionic aldehyde. See Propionaldehyde Propionic ether. See Ethyl propionate 2-Propoxyethanol. See Ethylene glycol propyl ether 2-(2-Propoxyethoxy) ethanol. See Diethylene glycol propyl ether Propoxylated (2) allylmethacrylate. See PPG-2 allylmethacrylate Propoxylated glycerol triacrylate. See Glyceryl propoxy triacrylate Propoxylated (2) 1,6-hexanediol diacrylate. See PPG-2 1,6-hexanediol diacrylate... 

Synonyms Bis (dodecyloxycarbonylethyl) sulfide Didodecyl 3,3 -thiodipropionate Dilauryl 3,3 -thiodipropionate DLT DLTDP DLTP LTDP Propionic acid, 3,3 -thiodi, didodecyl ester Thiobis (dodecyl propionate) 3,3 -Thiobispropanoic acid, didodecyl ester Thiodipropionic acid dilauryl ester Classification Diester Definition Diester of lauryl alcohol and 3,3 -thiodipropionic acid Empirical C30H58O4S Formula (Ci2H2500CCH2CH2)2S Properties Wh. flakes, sweetish odor sol. in benzene, toluene, acetone, ether, chloroform si. sol. in alcohols, ethyl acetate insol. in water m.w. 514.94 dens. 0.975 m.p. 40 C b.p. 240 C (1 mm) acid no. < 1 flash pt. HOC Toxicology LD50 (oral, rat) > 10.3 g/kg no known toxicity eye irritant TSCA listed Precaution Combustible Hazardous Decomp. Prods. Heated to decomp., emits toxic fumes thermal decomp, prods. SOx... 

For additives extracted from polyolefins, usually with diethyl ether, the extract is refluxed with ethanol and the solution is decanted from the insoluble residual polymer. On cooling, additives such as dilauryl and distearyl thiodipropionate separate out and are identified by infrmed examination. A 30 ul volume of the ethanolic solution is then spotted on to a thin Kieselgel 60 TLC plate and eluted with a suitable solvent, usually 98.5 + 1.5 toluene-ethyl acetate. The eluted plate is dried and sprayed with colour-developing reagents and the spots are examined. If the spots are to be submitted to mass spectrometric examination, methanolic iodine is used as the colour-developing reagent as this does not over-complicate the mass spectrometry. 

This procedure was used to check the recoveries of dilauryl thiodipropionate (DLTDP) by ether extraction. The method was checked at the 15 and 75 ppm DLTDP level from 700 ml of the aqueous and alcoholic extraction liquids. DLTDP was determined in the extracts by infrared spectroscopy and by elemental analysis for sulfur as discussed in Chapter 4). Table 12.1 shows that the recoveries are in excess of 80%. 

---