(5R)-5-Hydroxy-L-lysine dihydrochloride monohydrate
(5R)-5-Hydroxy-L-lysine dihydrochloride monohydrate (CAS: 355118-29-5, Formula: C6H14N2O3 · 2HCl · H2O, MW: 253.12) is a chiral amino acid derivative. This compound is valuable in chemical biology and synthesis, particularly for creating modified peptides and unnatural amino acid sequences. Its specific stereochemistry makes it a useful building block in research settings requiring precise molecular architecture.
- IUPAC
- (2S,5R)-2,6-Diamino-5-hydroxycaproic acid dihydrochloride

Peptide Synthesis
Incorporates a non-proteinogenic amino acid with specific stereochemistry into peptide chains for research and development of novel peptidomimetics.
Chemical Biology Research
Serves as a building block for constructing modified biomolecules or as a probe to study biological systems due to its defined chiral centre.
Synthesis of Unnatural Amino Acids
Used as a starting material or intermediate in the multi-step synthesis of more complex unnatural amino acid derivatives for medicinal chemistry.
Chiral Building Block
Its defined (5R) stereochemistry makes it a critical component in asymmetric synthesis requiring precise stereochemical control.
| Molecular weight | 253.12 |
|---|---|
| Empirical formula | C6H14N2O3 · 2HCl · H2O |
| Assay | ≥99.0% (AT) |
| Optical activity | [α]20/D +11.5±1.0°, c = 1% in 6 M HCl |

Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3261 8 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-36/37/39-45 |
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 (5R)-5-Hydroxy-L-lysine dihydrochloride monohydrate used for?
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(5R)-5-Hydroxy-L-lysine dihydrochloride monohydrate is primarily used as a building block in chemical synthesis, particularly in peptide chemistry, chemical biology research, and the creation of unnatural amino acid derivatives where precise stereochemistry is essential.
What is the CAS number and chemical formula for this product?
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The CAS number is 355118-29-5 and the chemical formula is C6H14N2O3 · 2HCl · H2O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies (5R)-5-Hydroxy-L-lysine dihydrochloride monohydrate with an assay of ≥99.0%. This is a technical/research grade material and TSS does not represent it as USP, BP, EP, or any other pharmacopoeia grade.
How should (5R)-5-Hydroxy-L-lysine dihydrochloride monohydrate be handled safely?
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This compound is classified as Danger with hazard statement H314 (Causes severe skin burns and eye damage). Appropriate personal protective equipment, including eyeshields, face shields, gloves, and suitable respiratory protection, must be used. Handle in a well-ventilated area and follow all safety precautions outlined in the Safety Data Sheet.
Is this product controlled or regulated?
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The provided data does not indicate that this product is a controlled or scheduled substance.
How is this chemical packed and shipped by TSS?
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As a global supplier and exporter, Tech Serve Solutions ensures that (5R)-5-Hydroxy-L-lysine dihydrochloride monohydrate is packed and shipped in compliance with all relevant international regulations for hazardous materials, identified under UN 3261, Class 8, Packing Group III.
How can I request a sample or quote?
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To request a sample or a quote for (5R)-5-Hydroxy-L-lysine dihydrochloride monohydrate, please contact our sales department through the website or via email, providing your details and the quantity required.
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