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CAS 55399-93-4

CAS 55399-93-4 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

Chemical identity and properties

PubChem 2D chemical structure for CAS 55399-93-4
CAS 55399-93-4PubChem CID 6918732

Hydroxyisoleucine

(4S)-4-hydroxy-L-isoleucine is an L-isoleucine derivative that is L-isoleucine bearing a (4S)-hydroxy substituent. It has a role as a plant metabolite. It is an amino alcohol, a non-proteinogenic L-alpha-amino acid and a L-isoleucine derivative. It is a tautomer of a (4S)-4-hydroxy-L-isoleucine zwitterion. ChEBI

IUPAC name
(2S,3R,4S)-2-amino-4-hydroxy-3-methylpentanoic acid
Molecular formula
C6H13NO3
Molecular weight
147.17 g/mol
Exact mass
147.08954328 Da
XLogP3
-2.8
Topological polar surface area
83.6 Ų
Hydrogen-bond donors
3
Hydrogen-bond acceptors
4
Covalent units
1
Defined stereocentres
3

Also known as

(4S)-4-Hydroxy-L-isoleucineUNII-4SWT01T54O(4S)-4-hydroxyisoleucine4SWT01T54OL-Ribonic acid, 2-amino-2,3,5-trideoxy-3-methyl-CHEBI:790794-HYDROXYISOLEUCINE, (+)-2-amino-2,3,5-trideoxy-3-methyl-L-ribonic acid
16 more reported names
4-HYDROXYISOLEUCINE (USP-RS)4-HYDROXYISOLEUCINE [USP-RS]RefChem:390694-HYDROXYISOLEUCINE (CONSTITUENT OF FENUGREEK SEED)(2S,3R,4S)-4-HYDROXYISOLEUCINEID-1101(2S,3R,4S)-2-Amino-4-hydroxy-3-methyl-pentanoic acidrel-(2S,3R,4S)-2-Amino-4-hydroxy-3-methylpentanoic acidAdyvia(4S)-4-Hydroxy-L-isoleucine, from fenugreek seed, >=98.0% (TLC)4-HYDROXY-L-ISOLEUCINE(2S,3R,4S)-4-hydroxy-L-isoleucine4-OH-IleH-Ile(4-OH)-OH(4S)-Hydroxy-L-isoleucine(4S)-4-Hydroxy-L-isoleucine;
External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 55399-93-4

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How CAS 55399-93-4 is used on this site

CAS 55399-93-4 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 55399-93-4 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.