C5H9NO3
131.13 g/mol
APIWarning
L-Hydroxyproline
CAS51-35-4EC200-091-9
Category
API
Compound Class
Natural Product
Primary Use
Pharmaceutical Raw Material
L-Hydroxyproline is a non-essential amino acid that serves as a key component of collagen, the primary structural protein in connective tissues. It is endogenously produced in the human body and participates in metabolic and catabolic processes.
Pharmaceutical raw material for collagen-related manufacturingResearch compound for metabolic and catabolic studies
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
StrongSame Parent
(2S,4R)-4-hydroxypyrrolidine-2-carboxylic Acid Hydrochloride
CAS32968-78-8
pharmaceutical intermediate
ReferenceSame Category
Norepinephrine bitartrate
CAS51-40-1
pharmaceutical raw material
ReferenceSame Category
Norepinephrine
CAS51-41-2
pharmaceutical raw material
ReferenceSame Category
Epinephrine bitartrate
CAS51-42-3
pharmaceutical raw material
ReferenceSame Category
Epinephrine
CAS51-43-4
pharmaceutical raw material
Referencestereoisomer of
Cis-4-hydroxyproline
CAS618-27-9
Non-essential amino acid analog
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for L-Hydroxyproline (CAS 51-35-4) 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,4R)-4-hydroxypyrrolidine-2-carboxylic acid
InChIKey
PMMYEEVYMWASQN-DMTCNVIQSA-N
SMILES
C1[C@H](CN[C@@H]1C(=O)O)O
Synonyms (54)
- (2S,4R)-4-hydroxyproline
- (2s,4r)-4-hydroxy-l-proline
- (4R)-4-hydroxy-L-proline
- (4r)-hydroxyproline
- 4 HYDROXYPROLINE
- 4-Hydroxy-L-proline
- 4-L-Hydroxyproline
- H-Hyp-OH
- H-trans-Hyp-OH
- Hydroxyproline (VAN)
- Hydroxyproline,(l)
- Hyp
- Hypro
- L-4-hydroxyproline
- L-4-transhydroxyproline
- L-Hydroxyproline
- L-Hydroxyproline (Standard)
- L-Hydroxyproline pure
- L-Proline, 4-hydroxy-
- L-Proline, 4-hydroxy-, (4R)-
- L-Proline, 4-hydroxy-, trans-
- L-Proline, trans-
- L-threo-4-hydroxyproline
- L-trans-4-hydroxy-proline
- Ls-Hydroxyproline
- NMH-Pro
- Proline, 4-hydroxy-
- Proline, 4-hydroxy- (VAN)
- Proline, 4-hydroxy-, L-
- cis 4 Hydroxyproline
- delta-Hydroxyproline
- hydroxiproline
- hydroxy-L-proline
- hydroxyproline
- oxyproline
- trans 4-hydroxy-l-proline
- trans-Hydroxyproline
- trans-L-Hydroxyproline
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