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Merck

30120

L-Cysteine hydrochloride

≥99.0% (RT)

Synonym(s):

L-Cysteine hydrochloride (1:1)

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About This Item

Linear Formula:
HSCH2CH(NH2)COOH · HCl
CAS Number:
Molecular Weight:
157.62
NACRES:
NA.77
PubChem Substance ID:
UNSPSC Code:
12352209
EC Number:
200-157-7
MDL number:
Beilstein/REAXYS Number:
3560277
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Product Name

L-Cysteine hydrochloride, anhydrous, ≥99.0% (RT)

Quality Level

assay

≥99.0% (RT)

form

powder or crystals

optical activity

[α]20/D +6.4±0.3°, c = 5% in 5 M HCl

impurities

≤0.5% foreign amino acids

ign. residue

≤0.1% (as SO4)

loss

≤1.0% loss on drying

color

white

mp

174.1-174.7 °C

solubility

H2O: 1 g/10 mL, clear, colorless

anion traces

sulfate (SO42-): ≤100 mg/kg

cation traces

Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤50 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, NH4+: ≤500 mg/kg, Na: ≤50 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg

application(s)

peptide synthesis

SMILES string

Cl[H].N[C@@H](CS)C(O)=O

InChI

1S/C3H7NO2S.ClH/c4-2(1-7)3(5)6;/h2,7H,1,4H2,(H,5,6);1H/t2-;/m0./s1

InChI key

IFQSXNOEEPCSLW-DKWTVANSSA-N

Application


  • Drug delivery systems: A study utilized L-Cysteine HCl in the formulation of mixed micelles for the enhanced delivery of carvedilol, a cardiovascular drug, illustrating its utility in improving solubility and bioavailability of pharmaceutical compounds (Öztürk et al., 2022).

Biochem/physiol Actions

NMDA glutamatergic receptor agonist that is also an agonist at AMPA glutamatergic receptors at high concentrations.
NMDA glutamatergic receptor agonist; AMPA glutamatergic receptor agonist at high concentrations.


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Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves



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Omicron BQ.1.1 and XBB.1 unprecedentedly escape broadly neutralizing antibodies elicited by prototype vaccination.
Ju, et al.
Cell Reports, 42, 112532-112532 (2023)
Michela Miani et al.
Cell metabolism, 28(4), 557-572 (2018-07-19)
The gut microbiota is essential for the normal function of the gut immune system, and microbiota alterations are associated with autoimmune disorders. However, how the gut microbiota prevents autoimmunity in distant organs remains poorly defined. Here we reveal that gut
Orit Redy-Keisar et al.
Nature protocols, 9(1), 27-36 (2013-12-07)
This protocol describes the synthesis of modular turn-ON QCy7-based probes for the detection of biologically relevant analytes, such as hydrogen peroxide, ubiquitous sulfhydryl and β-galactosidase. The probes presented herein are prepared through a simple procedure that involves the preliminary alkylation