C5H9NO3
131.13 g/mol
OtherWarning
(4S)-4-hydroxy-L-proline
CAS618-27-9EC210-542-1
Category
Other
Compound Class
Natural Product
Primary Use
Non-essential amino acid analog
(4S)-4-hydroxy-L-proline is a naturally occurring non-essential amino acid analog that is a major component of collagen, the structural protein found in connective tissues. It is formed by the post-translational hydroxylation of proline residues and is essential for the stability of the collagen triple helix.
Structural component in collagen and connective tissueResearch tool for studying collagen biosynthesis and stability
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
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Industrial chemical
Referencestereoisomer of
(2S,4R)-4-hydroxypyrrolidine-2-carboxylic Acid Hydrochloride
CAS32968-78-8
pharmaceutical intermediate
Referencestereoisomer of
Hydroxyproline
CAS51-35-4
pharmaceutical raw material
Safety Reference
Warning
H302Harmful if swallowed
H312Harmful in contact with skin
H315Causes skin irritation
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for (4S)-4-hydroxy-L-proline (CAS 618-27-9) is 2933.99.
HS code (international, 6-digit)
2933.99
EU CN code (8-digit)
2933 99 80
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
(2S,4S)-4-hydroxypyrrolidine-2-carboxylic acid
InChIKey
PMMYEEVYMWASQN-IMJSIDKUSA-N
SMILES
C1[C@@H](CN[C@@H]1C(=O)O)O
Synonyms (27)
- (2S,4S)4Hydroxyproline
- (4S)-4-hydroxy-L-proline
- (4s)-hydroxyproline
- 4-HYDROXYPROLINE CIS-(-)-
- 4-cis-L-hydroxyproline
- H-CIS-HYP-OH
- Hydroxyproline cis-form
- Hydroxyproline, cis-
- L-CIS-HYDROXYPROLINE
- L-Proline, 4-hydroxy-, (4S)-
- L-Proline, allo-hydroxy-
- L-allo-hydroxyproline
- L-cis-4-hydroxyproline
- LHydroxyproline
- LProline, 4hydroxy, cis
- LProline, 4hydroxy, cis (9CI)
- Proline, 4-allo-hydroxy-, L-
- allo-hydroxy-L-Proline
- cis-Hydroxyproline
- cis-hydroxy-L-proline
- cis-oxyproline
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