Cysteamine

Cysteamine
INN: mercaptamine
	Skeletal formula (top); Ball-and-stick model of the cysteamine
Clinical data
Trade names	Cystagon, Procysbi, Cystaran, others
Other names	2-Aminoethanethiol, β-Mercaptoethylamine, 2-Mercaptoethylamine, decarboxycysteine, thioethanolamine, mercaptamine bitartrate, cysteamine (USAN US)
AHFS/Drugs.com	Micromedex Detailed Consumer Information
License data	EU EMA: by mercaptamine; US DailyMed: Cysteamine;
Pregnancy; category	AU: B3;
Routes of; administration	By mouth, eye drops
ATC code	A16AA04 (WHO) S01XA21 (WHO);
Legal status
Legal status	CA: ℞-only; UK: POM (Prescription only); US: ℞-only; EU: Rx-only; In general: ℞ (Prescription only);
Identifiers
	IUPAC name 2-Aminoethane-1-thiol;
CAS Number	60-23-1 ;
PubChem CID	6058;
IUPHAR/BPS	7440;
DrugBank	DB00847;
ChemSpider	5834;
UNII	5UX2SD1KE2;
KEGG	D03634; as salt: D10468;
ChEBI	CHEBI:17141;
ChEMBL	ChEMBL602;
PDB ligand	DHL (PDBe, RCSB PDB);
CompTox Dashboard (EPA)	DTXSID3022875 ;
ECHA InfoCard	100.000.421
Chemical and physical data
Formula	C2H7NS
Molar mass	77.15 g·mol−1
3D model (JSmol)	Interactive image;
Melting point	95 to 97 °C (203 to 207 °F)
	SMILES C(CS)N;
	InChI InChI=1S/C2H7NS/c3-1-2-4/h4H,1-3H2 ; Key:UFULAYFCSOUIOV-UHFFFAOYSA-N;

Cysteamine is a chemical compound that can be biosynthesized in mammals, including humans, by the degradation of coenzyme A. The intermediate pantetheine is broken down into cysteamine and pantothenic acid. It is the biosynthetic precursor to the neurotransmitter hypotaurine.

It is a stable aminothiol, i.e., an organic compound containing both an amine and a thiol functional groups. Cysteamine is a white, water-soluble solid. It is often used as salts of the ammonium derivative [HSCH₂CH₂NH₃]⁺ including the hydrochloride, phosphocysteamine, and the bitartrate.

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