(2S,3R)-3-Amino-2-hydroxy-4-phenylbutyric acid hydrochloride
(2S,3R)-3-Amino-2-hydroxy-4-phenylbutyric acid hydrochloride (CAS: 128223-55-2) is a modified amino acid with a molecular weight of 231.68 g/mol. This compound presents as a white to off-white solid. It is primarily utilised as a building block in organic synthesis and as a research chemical for biochemical studies. Its specific stereochemistry makes it valuable in applications requiring precise molecular architecture.
- IUPAC
- (2S,3R)-AHPA
- Synonyms
- (2S,3R)-AHPA

Organic Synthesis Intermediate
Serves as a chiral building block in the synthesis of complex organic molecules, particularly in pharmaceutical research and development where stereospecificity is crucial.
Biochemical Research
Used in laboratory settings to investigate biochemical pathways and enzyme interactions. Its structure is relevant for studies involving amino acid metabolism or protein modification.
Peptide Chemistry
Can be incorporated into peptide chains to introduce specific structural features or modified functionalities, aiding in the development of novel peptidomimetics.
| Molecular weight | 231.68 |
|---|---|
| Empirical formula | C10H13NO3 · HCl |
| 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 (2S,3R)-3-Amino-2-hydroxy-4-phenylbutyric acid hydrochloride used for?
+
This compound is primarily used as a chiral building block in organic synthesis and as a research chemical in biochemical studies. It is also applicable in peptide chemistry for creating modified peptide chains.
What are the CAS number and formula for this compound?
+
The CAS number is 128223-55-2 and the empirical formula (hill notation) is C10H13NO3 · HCl.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies this chemical for research and development purposes. The specific assay and purity are available on the product's Certificate of Analysis. TSS does not represent this product as USP, BP, EP, or pharmacopoeia grade.
How should (2S,3R)-3-Amino-2-hydroxy-4-phenylbutyric acid hydrochloride be handled safely?
+
This compound is classified as a Warning with hazards H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, and gloves, should be worn. Handle in a well-ventilated area.
Is this compound a controlled substance?
+
The provided data does not indicate that this compound is a controlled substance.
How is this chemical packed and shipped?
+
We ensure secure packaging suitable for international shipping of fine chemicals, adhering to relevant transport regulations. Please contact us for detailed export information.
How can I request a sample or quote?
+
To request a sample or a quotation, please use the 'Request Quote' or 'Sample Request' functionality on our website, or contact our sales team directly.
▶ Related products
![(±)-(E)-4-Ethyl-2-[(E)-hydroxyimino]-5-nitro-3-hexenamide (C8H13N3O4) — chemical structure, CAS 138472-01-2; Biochemicals & Reagents, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F138472-01-2.png&w=3840&q=75)
(±)-(E)-4-Ethyl-2-[(E)-hydroxyimino]-5-nitro-3-hexenamide
C8H13N3O4
Biochemicals & Reagents![(±)-(E)-4-Ethyl-2-[(Z)-hydroxyimino]-5-nitro-3-hexen-1-yl-nicotinamide (C14H18N4O4) — chemical structure, CAS 162626-99-5; Biochemicals & Reagents, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F162626-99-5.png&w=3840&q=75)
(±)-(E)-4-Ethyl-2-[(Z)-hydroxyimino]-5-nitro-3-hexen-1-yl-nicotinamide
C14H18N4O4
Biochemicals & Reagents
(±)-2,5-Dimethoxy-4-bromoamphetamine hydrobromide
Biochemicals & Reagents

(±)-2-(p-Methoxyphenoxy)propionic acid
C10H12O4
Biochemicals & Reagents
(±)-2-Amino-6,7-dihydroxy-1,2,3,4-tetrahydronaphthalene hydrobromide
C10H13NO2·HBr
Biochemicals & Reagents
(±)-2-Hydroxydecanoic acid
C10H20O3
Biochemicals & Reagents
(±)-3-Hydroxydecanoic acid
C10H20O3
Biochemicals & Reagents
(±)-3-Hydroxyoctanoic acid
C8H16O3
Biochemicals & Reagents▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis