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Cysteamine hydrochloride

≥97.0% (RT)

β-Mercapto­ethylamine hydrochloride, 2-Mercapto­ethyl­amine hydrochloride, Decarboxy­cysteine hydrochloride, 2-Amino­ethane­thiol hydrochloride, Thio­ethanol­amine hydrochloride
Linear Formula:
CAS Number:
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EC Number:
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PubChem Substance ID:

Quality Level


≥97.0% (RT)


64-70 °C
67-71 °C

storage temp.


SMILES string




InChI key


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Cysteamine hydrochloride has been used in the in-situ generation of chiral cysteamine-capped cadmium sulfide quantum dots (CA-CdS QDs) for the sensing of Cd2+ and S2-.

Biochem/physiol Actions

Cysteamine is an aminothiol that can reduce important oxidized disulfide molecules such as cystine to yield cysteine. Cysteamine is used in a wide range of applications from regulation of gene expression, to depletion of somatostatin, to coating of nanoparticles.
Cysteamine hydrochloride is derived from the degradation of coenzyme A endogenously. Its concentration in plasma is low. It is commonly used as a drug for the orphan disease cystinosis, a lysosomal storage disorder, in which cysteamine decreases intralysosomal cystine accumulation.


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Signal Word


Hazard Statements

Hazard Classifications

Acute Tox. 4 Oral

Storage Class Code

13 - Non Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

A circular dichroism sensor for selective detection of Cd2+ and S2- based on the in-situ generation of chiral CdS quantum dots
Sianglam P, et al.
Spectrochemical Analysis by Atomic Absorption and Emission, 183, 408-416 (2017)
Mengxiao Yu et al.
Journal of the American Chemical Society, 133(29), 11014-11017 (2011-07-01)
pH regulates many cellular processes and is also an indicator of disease progression. Therefore, pH-responsive materials often serve as either tools in the fundamental understanding of cell biology or medicine for disease diagnosis and therapy. While gold nanoparticles have broad...
Martine Besouw et al.
Drug discovery today, 18(15-16), 785-792 (2013-02-19)
Cysteamine is an amino thiol with the chemical formula HSCH2CH2NH2. Endogenously, cysteamine is derived from coenzyme A degradation, although its plasma concentrations are low. Most experience with cysteamine as a drug originates from the field of the orphan disease cystinosis...
Paula Díez et al.
Analytical and bioanalytical chemistry, 405(11), 3773-3781 (2012-10-24)
Cysteamine core polyamidoamine G-4 dendron branched with β-cyclodextrins was chemisorbed on the surface of Au electrodes and further coated with Pt nanoparticles. Adamantane-modified glucose oxidase was subsequently immobilized on the nanostructured electrode surface by supramolecular association. This enzyme electrode was...
Adrien Jézégou et al.
Proceedings of the National Academy of Sciences of the United States of America, 109(50), E3434-E3443 (2012-11-22)
Cystinosin, the lysosomal cystine exporter defective in cystinosis, is the founding member of a family of heptahelical membrane proteins related to bacteriorhodopsin and characterized by a duplicated motif termed the PQ loop. PQ-loop proteins are more frequent in eukaryotes than...

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