7048-04-6/L-Cysteine hydrochloride monohydrate

Quick Details
Molecular Formula:C3H8ClNO2S.H2O
Molecular Weight:175.636
Appearance:white crystalline powder

  • Product Details


    Product Name:L-Cysteine hydrochloride monohydrate

    Molecular Formula:C3H8ClNO2S.H2O

    Appearance:white crystalline powder


    Chinese Manufacturer Supply Top Purity 99% 7048-04-6 L-Cysteine hydrochloride monohydrate with Efficient Delivery

    • Molecular Formula:C3H8ClNO2S.H2O
    • Molecular Weight:175.636
    • Appearance/Colour:white crystalline powder 
    • Vapor Pressure:0.000411mmHg at 25°C 
    • Melting Point:175 °C 
    • Refractive Index:6 ° (C=8, 1mol/L HCl) 
    • Boiling Point:293.9 °C at 760 mmHg 
    • Flash Point:131.5 °C 
    • PSA:111.35000 
    • Density:1.54 g/cm3 
    • LogP:0.76610 

    L-Cysteine hydrochloride monohydrate (Cas 7048-04-6) Usage

    General descriptio

    L-Cysteine hydrochloride monohydrate is a versatile chemical compound with various applications in different industries. It is a monohydrate, which means it contains one molecule of water for every molecule of the compound.

    Chemical Properties

    white crystalline powder


    L-Cysteine hydrochloride monohydrate is used as a precursor in the food industry. It is added to various food products, particularly baked goods, to improve their texture and appearance. It has been used in research to test its effectiveness as an inhibitor of enzymatic browning in apples. Enzymatic browning is the natural process of fruits and vegetables turning brown when exposed to air, and inhibitors like L-Cysteine can help prevent this. L-Cysteine hydrochloride monohydrate finds use in the pharmaceutical industry, although specific applications are not detailed. It may be employed as an ingredient in pharmaceutical formulations.


    ChEBI: A hydrate that is the monohydrate form of L-cysteine hydrochloride.

    Biochem/physiol Actions

    NMDA glutamatergic receptor antagonist.

    Purification Methods

    Likely impurities are cystine and tyrosine. Crystallise the salt from MeOH by adding diethyl ether, or from hot 20% HCl. Dry it under vacuum over P2O5. Hygroscopic. [Beilstein 4 III 1580, 1600.]

    Consumer Uses

    ECHA has no public registered data indicating whether or in which chemical products the substance might be used. ECHA has no public registered data on the routes by which this substance is most likely to be released to the environment.


    7048-04-6 Relevant articles

    Growth and Characterization of Non-Linear Optical Single Crystal: L-cysteine Hydrochloride Monohydrate

    V. Azeezaaa,b, A.J. Arul Pragasama , T.G. Sunithac , P. Koteeswarid and S. Sureshe,*

    , ACTA PHYSICA POLONICA A, Vol. 128 (2015)

    Some of the L-cysteine complexes are L-cysteine tartarate monohydrate [15], L-cysteine hydrochloride monohydrate [16, 17] and L-cysteine hydrochloride [18]. In the present investigation, attempts were made to grow single crystals of L-cysteine hydrochloride monohydrate (LCB) by slow solvent evaporation technique and characterization on single crystal X-ray diraction (XRD), UVvisible absorption, the Fourier transform infrared (FTIR) spectroscopy, microhardness, thermogravimetricdierential thermal analysis (TG-DTA), dierential scanning calorimetry (DSC), second harmonic generation and dielectric studies were done as well

    Unidirectional growth of L-cysteine hydrochloride monohydrate: first time observation as nonlinear optical material and its characterization

    G. Bhagavannarayana, S. Kumar, M. Shakir, S. K. Kushawaha, K. K. Maurya, R. Malhotra and K. R. Rao

    , J. Appl. Cryst. (2010). 43, 710-715

    A bulk size (~60 mm length and 20 mm diameter) single crystal of L-cysteine hydrochloride monohydrate has been successfully grown for the first time by the unidirectional Sankaranarayanan-Ramasamy method and found to be a nonlinear optical material by observing the second harmonic generation (SHG).

    7048-04-6 Process route

    phenol red

    phenol red

    L-cysteine hydrochloride monohydrate

    L-cysteine hydrochloride monohydrate

    Conditions Yield


    L-cysteine hydrochloride monohydrate

    L-cysteine hydrochloride monohydrate

    Conditions Yield

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