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Amino acids and derivatives

Thiocysteine

Also known as (2R)-2-amino-3-(disulfanyl)propanoic acid, L-Thiocysteine, (2S)-2-amino-3-disulfanylpropanoic acid

CAS 5652-32-4Formula C3H7NO2S2Molar mass 153.23 g/mol
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Thiocysteine chemical structure, C3H7NO2S2, CAS 5652-32-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
5652-32-4
Formula
C3H7NO2S2
Molar mass
153.23 g/mol
HS code
293090
Category
Amino acids and derivatives

What is Thiocysteine?

Plain description, key identifiers and synonyms

3-disulfanyl-L-alanine is an S-substituted L-cysteine where the S-substituent is specified as sulfanyl. It has a role as a mouse metabolite and a human metabolite. It is a tautomer of a 3-disulfanyl-L-alanine zwitterion.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2R)-2-amino-3-(disulfanyl)propanoic acid
CAS number
5652-32-4 CAS number cross-checkedOther or deprecated CAS: 6165-31-7
Molecular formula
C3H7NO2S2
UNII
3RZ74WA9J2
InChIKey
XBKONSCREBSMCS-REOHCLBHSA-N
InChI
InChI=1S/C3H7NO2S2/c4-2(1-8-7)3(5)6/h2,7H,1,4H2,(H,5,6)/t2-/m0/s1
Canonical SMILES
NC(CSS)C(=O)O
Isomeric SMILES
C([C@@H](C(=O)O)N)SS

Synonyms

  • (2R)-2-amino-3-(disulfanyl)propanoic acid
  • L-Thiocysteine
  • (2S)-2-amino-3-disulfanylpropanoic acid
  • (2R)-2-azaniumyl-3-(disulfanyl)propanoate
  • S-Mercaptocysteine
  • 3-disulfanyl-L-alanine
  • cysteine perthiol
  • S-sulfanylcysteine
  • cysteine persulfide
  • 3-(Thiosulfeno)-L-alanine
  • L-cysteine persulfide
  • (R)-2-amino-3-disulfanylpropanoic acid
  • 3-(Thiosulfeno)alanine
  • 3-(thiosulfeno)-alanine
  • Alanine, 3-(thiosulfeno)-
  • L-Alanine, 3-(thiosulfeno)-
  • 2-amino-3-disulfanylpropanoic acid
  • 2-amino-3-persulfhydrylpropanoic acid
  • 2-amino-3-hydrodisulfidopropanoic acid
  • 2-amino-3-hydropersulfidopropanoic acid
  • CSS
  • S-Mercapto-L-cysteine
  • s-thiocystine

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
153.23 g/molcalc.
Exact mass
152.9918 Dacalc.
LogP (octanol/water)
-0.02calc.
Topological polar surface area
63.32 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
3calc.
Heavy atoms
8calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.67calc.
Formal charge
0calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Thiocysteine suppliers

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Thiocysteine price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Roles

  • animal metabolite
  • eukaryotic metabolite
  • human metabolite
  • mammalian metabolite
  • metabolite
  • mouse metabolite

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Thiocysteine is traded under.

HS 2930.90Indicative HS code

Organo-sulphur compounds, other

World exports in 2024
$5.83B
+0.1% vs 2023, imports $5.93B
2019 to 2024
Top exporters
  1. China40.7%
  2. United States10.9%
  3. Japan9.3%
Top importers
  1. United States13.3%
  2. Brazil12.6%
  3. China6.6%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Thiocysteine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Thiocysteine, based on the data on this page

What is Thiocysteine?

3-disulfanyl-L-alanine is an S-substituted L-cysteine where the S-substituent is specified as sulfanyl. It has a role as a mouse metabolite and a human metabolite. It is a tautomer of a 3-disulfanyl-L-alanine zwitterion.

What is the CAS number of Thiocysteine?

The CAS registry number of Thiocysteine is 5652-32-4. Other or deprecated CAS numbers: 6165-31-7.

What is the molecular formula and weight of Thiocysteine?

The molecular formula of Thiocysteine is C3H7NO2S2 and its molar mass is 153.23 g/mol.

What is Thiocysteine used for?

Known uses and roles of Thiocysteine include animal metabolite, eukaryotic metabolite, human metabolite, mammalian metabolite, metabolite and 1 more.

Is Thiocysteine hazardous?

No GHS hazard classification for Thiocysteine is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Thiocysteine?

Thiocysteine is usually classified under HS code 293090 (Organo-sulphur compounds, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Thiocysteine?

Post a free request on CompoundList and suppliers of Thiocysteine will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Thiocysteine?

Suppliers quote Thiocysteine on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Thiocysteine

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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