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Cysteamine hydrochloride structure
Cysteamine hydrochloride structure

Cysteamine hydrochloride

Iupac Name:2-aminoethanethiol;hydrochloride
CAS No.: 156-57-0
Molecular Weight:77.14868
Modify Date.: 2023-05-14 12:28
Introduction: Cysteamine hydrochloride is used as an antioxidant and in radiation therapy. View more+
1. Names and Identifiers
1.1 Name
Cysteamine hydrochloride
1.2 Synonyms

1-Amino-2-mercaptoethane hydrochloride 1-Aminoethane-2-thiol hydrochloride 205-858-1 2-AMino&CYSTEAMINE HCL 2-Amino-ethanethiol 2-Aminoethanethiol Hydrochloride 2-amino-ethanethiol hydrochloride 2-Aminoethanethiol hydrochloride (1:1) 2-Amino-ethanethiol.HCl 2-aminoethylmercaptan hydrochloride 2-Mercapto ethyl amine hydrochloride 2-Mercaptoethanamine Hydrochloride 2-Mercaptoethylamin 2-Mercaptoethylamine hydrochloride 2-Mercaptoethylammonium chloride Aminoethanethiol hydrochloride b-Mercaptoethylamine Hydrochloride Cysteamine (Hydrochloride) Cysteamine HCl CYSTEAMINE HCL SOLID CYSTEAMINIUM CHLORIDE Cysteinamine Hydrochloride Decarboxycysteine hydrochloride EINECS 205-858-1 Ethanamine, N-mercapto-, hydrochloride (1:1) Ethanethiol, 2-amino-, hydrochloride (1:1) mea hydrochloride MERCAPTOETHYLAMINE HYDROCHLORIDE MFCD00012904 N-Sulfanylethanamine hydrochloride (1:1) Thioethanolamine hydrochloride thiol hydrochloride Β-Mercapto ethylamine hydrochloride Β-Mercaptoethylamine hydrochloride

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1.3 CAS No.
1.4 CID
1.6 Molecular Formula
C2H8ClNS (isomer)
1.7 Inchi
1.8 InChIkey
1.9 Canonical Smiles
1.10 Isomers Smiles
2. Properties
2.1 Density
2.1 Melting point
2.1 Boiling point
116.4°C at 760 mmHg
2.1 Refractive index
1.6100 (estimate)
2.1 Flash Point
2.1 Precise Quality
2.1 PSA
2.1 logP
2.1 Solubility
H2O: 1?m at?20?°C, clear, colorless
2.2 Appearance
white crystalline powder with a strong and disagreeable smell
2.3 Storage
Keep Cold. Store under Nitrogen. Hygroscopic.
2.4 Chemical Properties
White Solid
2.5 Color/Form
Crystals by sublimation in vacuo
Crystals from alcohol
2.6 PH
3.3-5.0 (400g/l, H2O, 20℃)
2.7 Water Solubility
2.8 Spectral Properties
1H NMR: 12825 (Sadtler Research Laboratories spectral collection)
IR: 17171 (Sadtler Research Laboratories spectral collection)
MASS: 4032 (National Bureau of Standards)
2.9 Stability
Stable, but hygroscopic. Incompatible with strong oxidizing agents.
2.10 StorageTemp
3. Use and Manufacturing
3.1 Purification Methods
Purify the salt by recrystallisation from EtOH. It is freely soluble in H2O and should be stored in a dry atmosphere. [Mills & Bogert J Am Chem Soc 62 1177 1940.] The picrate has m 125-126o; see previous entry for free base. [Beilstein 4 IV 1570.] Cysteamine hydrochloride Preparation Products And Raw materials Raw materials
3.2 Usage
Cysteamine hydrochloride is used as an antioxidant and in radiation therapy.
4. Safety and Handling
4.1 Symbol
4.1 Hazard Codes
4.1 Signal Word
4.1 Risk Statements
4.1 Safety Statements
4.1 Exposure Standards and Regulations
The Approved Drug Products with Therapeutic Equivalence Evaluations List identifies currently marketed prescription drug products, incl cysteamine bitartrate, approved on the basis of safety and effectiveness by FDA under sections 505 of the Federal Food, Drug, and Cosmetic Act. /Cysteamine Bitartrate/
4.2 Octanol/Water Partition Coefficient
log Kow = -0.20 (est)
4.3 Hazard Declaration
4.3 DisposalMethods
SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational exposure or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal, aquatic, and plant life; and conformance with environmental and public health regulations.
UN 3335
4.4 Formulations/Preparations
U.S.- 50 mg (Rx) Cystagon. 150 mg (Rx) Cystagon.
4.5 WGK Germany
4.5 Sensitive
4.6 Toxicity

Risk terms : R22 : Harmful if swallowed


2.Hazard identification

2.1 Classification of the substance or mixture

Skin corrosion, Category 1B

Specific target organ toxicity \u2013 single exposure, Category 3

2.2 GHS label elements, including precautionary statements

Signal word


Hazard statement(s)

H314 Causes severe skin burns and eye damage

H335 May cause respiratory irritation

Precautionary statement(s)

P260 Do not breathe dust/fume/gas/mist/vapours/spray.

P264 Wash ... thoroughly after handling.

P280 Wear protective gloves/protective clothing/eye protection/face protection.

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P271 Use only outdoors or in a well-ventilated area.


P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower].

P363 Wash contaminated clothing before reuse.

P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.

P310 Immediately call a POISON CENTER/doctor/\u2026

P321 Specific treatment (see ... on this label).

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

P312 Call a POISON CENTER/doctor/\u2026if you feel unwell.


P405 Store locked up.

P403+P233 Store in a well-ventilated place. Keep container tightly closed.


P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification


9. Other Information
9.0 Usage
An inhibitor of DMBA-induced mammary tumors2-Mercaptoethylamine hydrochloride acts as a precursor in taurine biosynthesis and component of coenzyme A. It is involved in the preparation of active pharmaceutical ingredients like ranitidine and nizatidine. It acts as an antidote for acetaminophen poisoning. Further, it is used in the oral treatment of nephropathic cystinosis, radiation sickness and disorders of cysteine excretion. In addition to this, it serves as an antioxidant and an inhibitor of 7,12-Dimethylbenz[a]anthracene (DMBA)-induced tumors.
10. Computational chemical data
  • Molecular Weight: 77.14868g/mol
  • Molecular Formula: C2H8ClNS
  • Compound Is Canonicalized: True
  • XLogP3-AA: null
  • Exact Mass: 113.0065981
  • Monoisotopic Mass: 113.0065981
  • Complexity: 10
  • Rotatable Bond Count: 1
  • Hydrogen Bond Donor Count: 3
  • Hydrogen Bond Acceptor Count: 2
  • Topological Polar Surface Area: 27
  • Heavy Atom Count: 5
  • Defined Atom Stereocenter Count: 0
  • Undefined Atom Stereocenter Count: 0
  • Defined Bond Stereocenter Count: 0
  • Undefined Bond Stereocenter Count: 0
  • Isotope Atom Count: 0
  • Covalently-Bonded Unit Count: 2
11. Question & Answer
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13. Realated Product Infomation