L-Cysteine S-sulfate (LCSS) is used as an NMDA glutamatergic receptor agonist. It serves as a substrate for cystine lyase(s).Cysteine is one of the functional amino acids that are associated with growth, reproduction, maintenance and immunity. Cysteine

Storage

Store at -20°C

Shipped In

Ice chest + Ice pads

This product requires cold chain shipping. Ground and other economy services are not available.

Action Type

AGONIST

Purity

≥98%

Names and Identifiers

Pubchem Sid	504756734
Pubchem Sid Url	https://pubchem.ncbi.nlm.nih.gov/substance/504756734
Canonical Smiles	C(C(C(=O)O)N)SS(=O)(=O)O
IUPAC Name	(2R)-2-amino-3-sulfosulfanylpropanoic acid
InChIKey	NOKPBJYHPHHWAN-REOHCLBHSA-N
INCHI	1S/C3H7NO5S2/c4-2(3(5)6)1-10-11(7,8)9/h2H,1,4H2,(H,5,6)(H,7,8,9)/t2-/m0/s1
Isomeric SMILES	C([C@@H](C(=O)O)N)SS(=O)(=O)O
Molecular Weight	201.22
Beilstein	1726832
Reaxy-Rn	2415846
Reaxys-RN_link_address	https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=2415846&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

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✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

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📊 Datasheet

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

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Advanced Data

Taxonomic Classification

Taxonomy Tree

Kingdom Organic compounds
- Superclass Organic acids and derivatives
  - Class Carboxylic acids and derivatives
    - Subclass Amino acids, peptides, and analogues
      - Level5 Amino acids and derivatives
        Level6 Alpha amino acids and derivatives
        Level7 Cysteine and derivatives
        Level8 L-cysteine-S-conjugates
        Level9 S-sulfo-L-cysteines

Kingdom	Organic compounds
Superclass	Organic acids and derivatives
Class	Carboxylic acids and derivatives
Subclass	Amino acids, peptides, and analogues
Intermediate Tree Nodes	Amino acids and derivatives - Alpha amino acids and derivatives - Cysteine and derivatives - L-cysteine-S-conjugates
Direct Parent	S-sulfo-L-cysteines
Alternative Parents	L-alpha-amino acids S-alkyl thiosulfates Amino acids Sulfenyl compounds Monocarboxylic acids and derivatives Carboxylic acids Organopnictogen compounds Organic oxides Monoalkylamines Hydrocarbon derivatives Carbonyl compounds
Molecular Framework	Aliphatic acyclic compounds
Substituents	S-sulfo-l-cysteine - Alpha-amino acid - L-alpha-amino acid - S-alkyl thiosulfate - Amino acid - Carboxylic acid - Monocarboxylic acid or derivatives - Sulfenyl compound - Organic nitrogen compound - Hydrocarbon derivative - Organic oxide - Primary amine - Organosulfur compound - Organooxygen compound - Organonitrogen compound - Organopnictogen compound - Primary aliphatic amine - Organic oxygen compound - Carbonyl group - Amine - Aliphatic acyclic compound
Description	This compound belongs to the class of organic compounds known as s-sulfo-l-cysteines. These are s-conjugated L-cysteine where the S-substituent is specified as a sulfo group.
External Descriptors	S-substituted L-cysteine - organic thiosulfate
1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61. DOI: 10.1186/s13321-016-0174-y

3D Structure

Associated Targets(Human)

VDR Tclin Vitamin D receptor (26531 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ALDOA Tbio Fructose-bisphosphate aldolase A (1 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ALOX15B Tchem Arachidonate 15-lipoxygenase, type II (7244 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ALDH1A1 Tchem Aldehyde dehydrogenase 1A1 (77053 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

CYP2D6 Tclin Cytochrome P450 2D6 (33882 Activities)

Discover Target: CYP2D6

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

GAPDH Tchem Glyceraldehyde-3-phosphate dehydrogenase liver (1284 Activities)

Discover Target: GAPDH

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

CYP1A2 Tchem Cytochrome P450 1A2 (26471 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

CYP2C9 Tchem Cytochrome P450 2C9 (32119 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

CYP2C19 Tchem Cytochrome P450 2C19 (29246 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

CYP3A4 Tclin Cytochrome P450 3A4 (53859 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

HSD17B10 Tchem Endoplasmic reticulum-associated amyloid beta-peptide-binding protein (20669 Activities)

Discover Target: HSD17B10

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

APEX1 Tchem DNA-(apurinic or apyrimidinic site) lyase (38016 Activities)

Discover Target: APEX1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

TDP1 Tchem Tyrosyl-DNA phosphodiesterase 1 (345557 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

KDM4E Tchem Lysine-specific demethylase 4D-like (40243 Activities)

Discover Target: KDM4E

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

HPGD Tchem 15-hydroxyprostaglandin dehydrogenase [NAD+] (24926 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

USP1 Tchem Ubiquitin carboxyl-terminal hydrolase 1 (22556 Activities)

Discover Target: USP1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

RGS4 Tchem Regulator of G-protein signaling 4 (13867 Activities)

Discover Target: RGS4

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

RUNX1 Tbio Runt-related transcription factor 1/Core-binding factor subunit beta (7867 Activities)

Discover Target: RUNX1

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Associated Targets(non-human)

Hdac6 Histone deacetylase 6 (222 Activities)

Discover Target: Hdac6

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

lef Anthrax lethal factor (7585 Activities)

Discover Target: lef

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

GCN5 Histone acetyltransferase GCN5 (89 Activities)

Discover Target: GCN5

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

rep Replicase polyprotein 1ab (378 Activities)

Discover Target: rep

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

asd Aspartate-semialdehyde dehydrogenase (2 Activities)

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Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Mapt Microtubule-associated protein tau (6 Activities)

Discover Target: Mapt

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

fba Putative fructose-1,6-bisphosphate aldolase (15559 Activities)

Discover Target: fba

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

ffp 4'-phosphopantetheinyl transferase ffp (24982 Activities)

Discover Target: ffp

Activity Type	Relation	Activity value	Units	Action Type	Journal	PubMed Id	doi	Assay Aladdin ID

Mechanisms of Action

Certificates（CoA,COO,BSE/TSE and Analysis Chart)

C of A & Other Certificates(BSE/TSE, COO):

Analytical Chart:

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5 results found

Lot Number	Certificate Type	Date	Item
I2312411	Certificate of Analysis	Jun 15, 2026	L465016
I2312412	Certificate of Analysis	Jun 15, 2026	L465016
I2312413	Certificate of Analysis	Jun 15, 2026	L465016
I2312414	Certificate of Analysis	Jun 15, 2026	L465016
I2312415	Certificate of Analysis	Jun 15, 2026	L465016

Chemical and Physical Properties

Flash Point(°F)	Not applicable
Flash Point(°C)	Not applicable
Molecular Weight	201.200 g/mol
XLogP3	-4.000
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	7
Rotatable Bond Count	4
Exact Mass	200.977 Da
Monoisotopic Mass	200.977 Da
Topological Polar Surface Area	151.000 Å²
Heavy Atom Count	11
Formal Charge	0
Complexity	229.000
Isotope Atom Count	0
Defined Atom Stereocenter Count	1
Undefined Atom Stereocenter Count	0
Defined Bond Stereocenter Count	0
Undefined Bond Stereocenter Count	0
The total count of all stereochemical bonds	0
Covalently-Bonded Unit Count	1

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L-Cysteine S-sulfate - ≥98% , CAS No.1637-71-4

Why this grade

Storage & shipping

Quality documents

Literature proof

Specifications