Reference

Aminoethanethiol depilatories

Aminoethanethiol depilatories. Murcia, Daniel Antonio; Wells, Robert Lee (Procter and Gamble Co., USA). Eur.In this study， 26691-13-4 and 96-27-5 are also used. Pat. Appl. EP 95916 A2 7 Dec 1983, 11 pp. DESIGNATED STATES: R: BE, DE, FR, GB, IT, NL. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: A61K007-155. APPLICATION: EP 83-303086 27 May 1983. PRIORITY: US 82-383431 1 Jun 1982. DOCUMENT TYPE: Patent CA Section: 62 (Essential Oils and Cosmetics) A fast-acting aq. depilatory with a pH of 10.5-12.5 contains 0.1-2M aminoethanethiol [60-23-1] or its salts, and addnl., filler, emulsifier, thickener, emollient, chelating agent, fragrance, colorant, H2O, and optionally a 2nd active thiol. The depilatory may be formulated as a cream, gel, or aerosol. A depilatory gel contained Ceteareth 50 24.50, thioglycerol [96-27-5] 2.48, 2-aminoethanethiol-HCl [68-11-1] 5.00, Ca(OH)2 10.80, fragrance 2.00, and H2O 55.22%. .

Production of S-carboxymethyl-L-cysteine

Production of S-carboxymethyl-L-cysteine. (Showa Denko K. K., Japan). Jpn. Kokai Tokkyo Koho JP 58187198 A2 1 Nov 1983 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C12P013-12. ICA: C07C149-247. APPLICATION: JP 82-69559 27 Apr 1982. DOCUMENT TYPE: Patent CA Section: 16 (Fermentation and Bioindustrial Chemistry) S-Carboxymethyl-L-cysteine (I) [638-23-3] is prepd. from thioglycolic acid (II) [68-11-1] and b-chloroalanine (III) [3981-36-0] or serine [56-45-1] in the presence of vitamin B6 enzymes catalyzing b-substitution of amino acids. Thus, 34 units of tryptophan synthetase [9014-52-2] from Escherichia coli ATCC-15491 was added to 200 mL soln. contg. 56-45-1 and 3981-36-0 which are cas registry numbers are also used here. II 4.6, DL-III 12.3, Na EDTA 1.5 g, and pyridoxal phosphate 8 mg in 0.05M Na borate buffer (pH 8) and incubated at 37°; 0.6 g III and 0.23 g II were added to the reaction soln. every 30 and 60 min, resp., for 9 h, maintaining the pH at 8 with NaOH. After 10 h, the reaction was terminated by addn. of 40 mL HCl and the resulting mixt. centrifuged to give the sugernatant contg. 2.3 g I. .