L-Cysteine S-sulfate
L-Cysteine S-sulfate (CAS: 1637-71-4; Formula: C3H7NO5S2) is a modified amino acid derivative with a molecular weight of 201.22 g/mol. This compound is primarily utilized as a biochemical reagent in research and laboratory settings. It serves as a building block or intermediate in various chemical synthesis pathways, contributing to advancements in biochemical research and analysis. Available from Tech Serve Solutions with a purity of ≥98% (TLC).
- IUPAC
- S-Sulfo-L-cysteine
- Synonyms
- S-Sulfo-L-cysteine

Biochemical Research
L-Cysteine S-sulfate serves as a valuable reagent in biochemical research. Its structure makes it useful for studies involving amino acid metabolism and protein chemistry.
Chemical Synthesis
This compound can be employed as an intermediate or building block in the synthesis of more complex organic molecules. Its utility extends to the creation of novel chemical entities.
Laboratory Reagent
As a laboratory reagent, L-Cysteine S-sulfate is used in various analytical and experimental procedures. It supports a range of scientific investigations requiring specific amino acid derivatives.
| Molecular weight | 201.22 |
|---|---|
| Empirical formula | C3H7NO5S2 |
| Assay | ≥98% (TLC) |
| Storage temperature | −20°C |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is L-Cysteine S-sulfate used for?
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L-Cysteine S-sulfate is primarily used as a biochemical reagent in research and laboratory settings, and as an intermediate in chemical synthesis.
What are the CAS number and chemical formula for L-Cysteine S-sulfate?
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The CAS number for L-Cysteine S-sulfate is 1637-71-4, and its chemical formula is C3H7NO5S2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies L-Cysteine S-sulfate with an assay of ≥98% (TLC). This product is supplied for research and laboratory use and is not represented as USP, BP, EP, or other pharmacopoeia grades.
How should L-Cysteine S-sulfate be handled?
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L-Cysteine S-sulfate is a Warning substance that may cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, and gloves, should be used. Work in a well-ventilated area.
How is L-Cysteine S-sulfate shipped and exported?
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Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including L-Cysteine S-sulfate, adhering to all relevant shipping and export regulations.
How can I request a sample or quote for L-Cysteine S-sulfate?
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To request a sample or quote for L-Cysteine S-sulfate, please contact our sales team through the TSS website or by calling our main office. Provide the product name and CAS number for faster service.
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