Cysteamine
（重定向自Decarboxycysteine）
![Ball-and-stick model of the cysteamine molecule](/Images/godic/202501/08/Cysteamine_3D_ball3400.png")
Cysteamine is the chemical compound with the formula HSCH2CH2NH2. It is the simplest stable aminothiol and a degradation product of the amino acid cysteine. It is often used as the hydrochloride salt, HSCH2CH2NH3Cl. The comparatively high melting point of cysteamine (95-97 °C), indicates that it exists in a salt form.