Showing papers on "Thioglycolic acid published in 1970"
TL;DR: A modified procedure is presented for the spectrophotometric determination of iron by orthophenanthroline, and reduction of iron prior to development of color is accomplished by thioglycolic acid, and is instantaneous at room temperature.
29 citations
28 citations
Patent•
07 Apr 1970TL;DR: In this article, the authors present a method of treating unconstrained hair in a HAIR TREATING PROCESS to improve and maintain its set-up without imposing any permanent deformation.
Abstract: 1. A METHOD OF TREATING UNCONSTRAINED HAIR IN A HAIR TREATING PROCESS TO IMPROVE AND PROLONG ITS SETTING PROPERTIES WITHOUT IMPARTING ANY PERMANENT DEFORMATION TO THE SAME COMPRISING THE STEPS OF FIRST APPLYING TO THE UNCONSTRAINED HAIR AN EFFECTIVE AMOUNT OF A COMPOSITON CONTAINING, IN AQUEOUS MEDIA, A THIOL REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF THIOGLYCOLIC ACID, THIOGLYCEROLL, GLYCOL THIOGLYCOLATE, GLYCEROL THIOGLYCOLATE, GLYCOL THIOLACTATE, B-MERCAPTO-ETHANOL, N-CARBOXYMETHYLMERCAPTO-ACETAMIDE, THIOLACTIC ACID AND B-MERCAPTOPROPIONIC ACID AND AN OXIDATION AGENT SELECTED FROM THE GROUP CONSISTING OF THE DISULFIDES OF THE FOLLOWING THIOLS; THIOGLYCOLIC ACID, THIOGLYCEROL, GLYCOL THIOGLYCOLATE, GLYCEROL THIOLGLYCOLATE, GLYCOL THIOLACTATE, B-MERCAPTO-ETHANOL, N-CAROXYMETHYL-MERCAPTO-ACETATMIDE, THIOLACTIC ACID AND B-MERCAPTOPROPIONIC ACID, THE MOLAR RATIO OF THE OXIDIZING AGENT TO SAID REDUCING AGENT BEING AT LEAST 1.5:1 AND UP TO 20:1, WITH THE AMOUNT OF REDUCING AGENT IN THE COMPOSITION BEING ABOUT 0.01-0.5 MOLE PER LITER AND THE AMOUNT OF OXIDIZING AGENT BEING ABOUT 0.015-10 MOLE PER LITER, SAID COMPOSITION HAVING A PH OF ABOUT 9-10, ALLOWING THE COMPOSITION TO REMAIN IN CONTACT WITH THE UNCONSTRAINED HAIR FOR ABOUT 1 TO 15 MINUTES AND THEREAFTER RINSING AND DRYING THE HAIR.
18 citations
TL;DR: Methylated western hemlock tannin (Tsuga heterophylla) was cleaved with thioglycolic acid to give approximately equal amounts of the methyl 2,3-cis and trans leucocyanidin units and further substantiates the presence of carbon-carbon linkages between them as mentioned in this paper.
17 citations
Patent•
15 Jan 1970TL;DR: In this paper, the authors describe the reaction product of a NICKEL COMPOUND with a ligand selected from the group consisting of GLYCOLIC ACID, THIOGLY COLIC ACIDs, and THIOLACTIC ACIDS.
Abstract: ETHYLENE IS POLYMERIZED IN THE PRESENCE OF A CATALYST WHICH IS THE REACTION PRODUCT OF A NICKEL COMPOUND WITH A LIGAND SELECTED FROM THE GROUP CONSISTING OF GLYCOLIC ACID, THIOGLYCOLIC ACID AND THIOLACTIC ACID. THE NICKEL COMPOUNDS COMPRISE OLEFINICALLY UNSATURATED COMPOUNDS OF FROM 2 TO 20 CARBON ATOMS. THE PREFERRED NICKEL COMPOUND IS BISCYCLOOCTADIENE-1,5-NICKEL.
16 citations
TL;DR: In this paper, the magnetic and spectroscopic properties of dihydrates and anhydrous copper(II) complexes with methyl, ethyl, n-propyl, isopropyl and benzyl thioglycolic acids were investigated.
Abstract: The dihydrates and anhydrous copper(II) complexes with methyl, ethyl, n-propyl, isopropyl, n-butyl, and benzyl thioglycolic acids were synthesized, and their properties were investigated. The magnetic data show that the copper in the complexes is divalent and that the complexes do not have a copper(II) acetate structure. The spectroscopic data show that these ligands bond to the central metal ion as strongly as does amino acid or water. In the case of isopropyl thioglycolato copper(II) dihydrate, the blue and the violet isomers were obtained. The structures of the complexes in the solid state as well as in the solution were discussed.
13 citations
TL;DR: Some new metal chelate compounds of ethanediylidenetetrathiotetraacetic acid (H4ETTA), such as Co2L·5H2O, Co 2L·4H 2O and FeHL·3.5H 2 O, were obtained in this paper, where the infrared spectra and other properties of these compounds were compared with those of other thioglycolic acid derivatives.
Abstract: Some new metal chelate compounds of ethanediylidenetetrathiotetraacetic acid (H4ETTA), Co2L·5H2O, Cu2L·4H2O, Zn2L·3H2O, Ni2L·6H2O, and FeHL·3.5H2O, where H4L is H4ETTA, were obtained. The infrared spectra and other properties of these compounds were compared with those of the metal complexes of other thioglycolic acid derivatives, some of which are also new compounds. Judging from the wave numbers of the stretching bands, the carboxyl group of these complexes can be said to be rather ionic. Though the bond is not very strong, thioglycolic acid derivatives seem to bond with the central metal ion with both the sulfur atom and the carboxyl group.
11 citations
Patent•
20 Jul 1970
TL;DR: In this article, a single reagent formulation for use in the spectrophotometric determination of iron, which is capable of carrying out the multiple functions required in spectral determination, comprises a solution of thioglycolic acid, a buffer to maintain the pH of the solution at a predetermined value or range and a ferroin reagent present in an amount effective to form a colored complex with the iron in a test sample.
Abstract: A single reagent formulation for use in the spectrophotometric determination of iron, which is capable of carrying out the multiple functions required in the spectrophotometric determination, comprises a solution of thioglycolic acid, a buffer to maintain the pH of the solution at a predetermined value or range and a ferroin reagent present in an amount effective to form a colored complex with the iron in a test sample. Superior solubilizing of the iron in a test sample is achieved when ammonium hydroxide serves as the buffer.
7 citations
Patent•
06 May 1970
TL;DR: In this article, aqueous solution of steroid 21-phosphate esters stabilized with a compound selected from thioglycerol and thioglobal acid is presented.
Abstract: Pharmaceutical compositions suitable for parenteral administration, consisting of aqueous solutions of steroid 21-phosphate esters stabilized with a compound selected from thioglycerol and thioglycolic acid.
4 citations
Patent•
30 Nov 1970
TL;DR: In this paper, the authors defined a permanent action in the keratin of hair and applied it as permanent wave solutions or depilatory creams, and formulated a formula HS-CH 2-R-CH2-SH (I) subject to the proviso that R3 and R4 may not both = H).
Abstract: Compounds of formula: HS-CH2-R-CH2-SH (I) (where R may be -CH-CH and R1,R2,R3 and R4 are H, OH, -COOH, -CH2OH, or -NH2, or may form part of heterocyclic ring) subject to the proviso that R3 and R4 may not both = H) have a permanent action in the keratin of hair, and in suitable compositions are applied as permanent wave solutions or depilatory creams - Preparation of the new compounds is by known methods, such as: Cl-CH2-R-CH2-Cl + CH3-C SH-CH2-R-CH2-SH H3O+ CH3OC-S-CH2-R-CH2-S-CO-CH3 - Formulations contain 05-15% compound A, usual cosmetic agents such as emulsants, perfumes, and opt another reducing agent such as thioglycolic acid, made up as a solution, cream, gel, powder or aerosol
2 citations
TL;DR: In this paper, the degradation of the pyrimidine moiety of thiamine for the use of radioactive determination of individual carbon atoms is discussed, which can be exhaustively methylated and the product hydrolytically cleaved, thus giving information about all the carbon atoms.
Abstract: Publisher Summary This chapter discusses the degradation of the pyrimidine moiety of thiamine for the use of radioactive determination of individual carbon atoms. The bisulfite cleavage of thiamine quantitatively yields 4-amino-2-methylpyrimidine-5-methylsulfonic acid. This is converted to the more easily purifiable 4-hydroxy derivative, which is then oxidized by the Kuhn–Roth method giving C-2 and C-8 as acetic acid. The thioglycolic acid cleavage of oxythiamine yields 4-hydroxy-2-methylpyrimidine-5-methylthioacetic acid. After purification, this compound can be treated by two different methods—including, (1) reduction by sodium in alcohol gives 1,3-diamino-2-methylpropane, which can be oxidized by the Kuhn–Roth method to give acetic acid from C-5 and C-7 and (2) Raney nickel reduction gives 4-hydroxy-2,5-dimethylpyrimidine, which can be exhaustively methylated and the product hydrolytically cleaved, thus giving information about all the carbon atoms.