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Cysteamine CAS 60-23-1

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Cysteamine, also known as 2-Aminoethanethiol, is an organic compound containing a thiol group (-SH). Its chemical formula is C₂H₇NS, molecular weight is 77.149, and CAS number is 60-23-1. The thiol group in its molecule is chemically reactive and easily oxidized to disulfides. It must be prepared and used immediately or stored as a hydrochloride salt, typically at 2–8°C in a light-protected environment. Its physicochemical properties include a density of approximately 1.0 g/cm³, a boiling point of approximately 133.6 °C, a melting point of 95 °C, and a flash point of approximately 34.6 °C. It appears as a white powder and is readily soluble in water and alcohol. This compound exists in a free state under alkaline conditions. Industrially, it is mainly prepared by the reaction of ethanolamine with hydrogen sulfide, the addition and subsequent cyclization hydrolysis of ethanolamine with hydrogen bromide, or the reduction of cysteine.
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Cysteamine Basic information
Product Name:	Cysteamine
CAS:	60-23-1
MF:	C2H7NS
MW:	77.15
EINECS:	200-463-0
Mol File:	60-23-1.mol
Cysteamine Chemical Properties
Melting point	95°C
Boiling point	130 °C
density	0.934 (estimate)
refractive index	1.5300 (estimate)
storage temp.	2-8°C
Water Solubility	Soluble in water
solubility	Water (soluble), Ethanol (soluble (95% EtOH))
form	Powder
pka	8.35(at 25℃)
color	White to slightly yellow
Merck	142,779
BRN	635649
Henry's Law Constant	2.7×101 mol/(m3Pa) at 25℃, HSDB (2015)
Stability:	Stable, but may be air-sensitive. Incompatible with strong oxidizing agents.
Cosmetics Ingredients Functions	HAIR WAVING OR STRAIGHTENING
InChI	1S/C2H7NS/c3-1-2-4/h4H,1-3H2
InChIKey	UFULAYFCSOUIOV-UHFFFAOYSA-N
SMILES	NCCS
CAS DataBase Reference	60-23-1(CAS DataBase Reference)
EPA Substance Registry System	Cysteamine (60-23-1)