L-Cysteine hydrochloride, monohydrate

To a suspension of 35.2 grams (0.2 mol) of L-cysteine hydrochloride monohydrate stirred in a reaction vessel containing 87 ml of 91% aqueous tetrahydrofuran under a nitrogen... 

C3H7NO2S 52-90-4) see Carbocisteine Cilastatin Eptifibatide Letosteine Timonacic L-cysteine hydrochloride monohydrate... 

The submitters purchased L-cysteine hydrochloride monohydrate from Schwartz/Mann Division, Becton, Dickinson, and Company, Mountain View Avenue, Orangeburg, New York 10962. The checkers used material supplied by Aldrich Chemical Company, Inc. 

S-Acetamidomethyl-L-cysteine hydrochloride Alanine, 3-[(acetamidomethyl)thio]-, monohydrochloride, i- (8) L-Cysteine, S-[(acetylamino)methyl]-, monohydrochloride (9) (28798-28-9) L-Cysteine hydrochloride, monohydrate (8, 9) (7048-04-6) Mercury(II) acetate Acetic acid, mercury (2) salt (8,9) (1600-27-7)... 

L-Cysteine is normally added as L-cysteine hydrochloride or L-cysteine hydrochloride monohydrate. When the ADD process was in use it was incorporated in a compound improver. If L-cysteine is used as a pastry relaxant it is supplied mixed with either soy flour or an inactivated wheat flour. This of course aids dispersion and the measurement of very small quantities. 

L-Cysteine hydrochloride monohydrate [7048-09-6] (115) 1000C I(1)592A, N(1)499B HA2275000, USP... 

To a suspension of 35.2 grams (0.2 mol) of L-cysteine hydrochloride monohydrate stirred in a reaction vessel containing 87 ml of 91% aqueous tetrahydrofuran under a nitrogen atmosphere there is added 54.4 grams (0.4 mol) of sodium acetate trihydrate. The mixture is stirred for 20 minutes at room temperature to insure neutralization of the hydrochloride salt resulting in the formation of a suspension of equimolar amounts of cysteine and sodium acetate. 

Spectrophotometer to read absorbance at 340 nm 30 mM cysteine, pH 7.0 (prepare using L-cysteine hydrochloride, monohydrate, and pH to 7.0 using sodium bicarbonate)... 

CYSCLM10. L(+)-Cysteine hydrochloride monohydrate (C3H8N02S+, Cl-, H20). Ayyar RR (1968) Z Kristallogr 126 227... 

Sodium molybdate dihydrate, hydrazine dihydrochloride, and L-cysteine hydrochloride monohydrate were purchased from Nacalai Tesque. 

In the method described here, both reduction of molybdate and introduction of sulfide bridges are achieved by the addition of sodium sulfide to a solution of sodium molybdate. The addition of L-cysteine hydrochloride monohydrate to the resultant solution then gives the desired product. 

Even methylene iminiiim salts can be formed from ammonium salts and paraformaldehyde in the ball mill [18]. Kaupp found that they are extremely labile but were efficiently trapped by adjacent thiol groups, such as in the reaction of (L)-cysteine hydrochloride monohydrate yielding the (L)-thiazolidine hydrochloride 315, presumably via an imine intermediate 314 (Scheme 3.87). 

Synonyms L-2-Amino-3-mercaptopropanoic acid monohydrochloride monohydrate Cysteine chlorhydrate monohydrate Cysteine HCI monohydrate L-Cysteine hydrochloride monohydrate L-Cysteine monohydrochloride monohydrate... 

A suspension of L-cysteine hydrochloride monohydrate in aq. 91%-tetrahydro-furan stirred under Ng and treated with 2 moles Na-acetate trihydrate, stirring continued 20 min. at 9-15°, cooled to 3-6°, treated dropwise with 1.05 moles acetic anhydride, stirred 6 hrs. at room temp., allowed to stand overnight, finally refluxed 4 hrs. N-acetyl-L-cysteine. Y 80.6%. F. e. s. T. A. Martin, J. R. Corrigan, and C. W. Waller, J. Org. Chem. 30, 2839 (1965). 

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