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Humectants

Hydroxyisoleucine

Also known as (4S)-4-Hydroxy-L-isoleucine, (2S,3R,4S)-2-amino-4-hydroxy-3-methylpentanoic acid, (4S)-4-hydroxyisoleucine

CAS 55399-93-4Formula C6H13NO3Molar mass 147.17 g/mol
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Hydroxyisoleucine chemical structure, C6H13NO3, CAS 55399-93-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
55399-93-4
Formula
C6H13NO3
Molar mass
147.17 g/mol
HS code
292250
Category
Humectants

What is Hydroxyisoleucine?

Plain description, key identifiers and synonyms

(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.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2S,3R,4S)-2-amino-4-hydroxy-3-methylpentanoic acid
CAS number
55399-93-4 CAS number cross-checkedOther or deprecated CAS: 1044661-15-5, 50764-07-3
Molecular formula
C6H13NO3
UNII
4SWT01T54O
MDL number
MFCD07357252
INCI name
HYDROXYISOLEUCINE
InChIKey
OSCCDBFHNMXNME-YUPRTTJUSA-N
InChI
InChI=1S/C6H13NO3/c1-3(4(2)8)5(7)6(9)10/h3-5,8H,7H2,1-2H3,(H,9,10)/t3-,4-,5-/m0/s1
Canonical SMILES
CC(O)C(C)C(N)C(=O)O
Isomeric SMILES
C[C@@H]([C@H](C)O)[C@@H](C(=O)O)N

Synonyms

  • (4S)-4-Hydroxy-L-isoleucine
  • (2S,3R,4S)-2-amino-4-hydroxy-3-methylpentanoic acid
  • (4S)-4-hydroxyisoleucine
  • L-Ribonic acid, 2-amino-2,3,5-trideoxy-3-methyl-
  • 4-Hydroxyisoleucine, (+)-
  • 2-amino-2,3,5-trideoxy-3-methyl-L-ribonic acid
  • 4-Hydroxyisoleucine (usp-rs)
  • 4-Hydroxyisoleucine
  • 4-Hydroxyisoleucine (constituent of fenugreek seed)
  • (2S,3R,4S)-4-Hydroxyisoleucine
  • (2S,3R,4S)-2-Amino-4-hydroxy-3-methyl-pentanoic acid
  • rel-(2S,3R,4S)-2-Amino-4-hydroxy-3-methylpentanoic acid
  • Adyvia
  • (4S)-4-Hydroxy-L-isoleucine, from fenugreek seed, >=98.0% (TLC)
  • 4-Hydroxy-l-isoleucine
  • (2S,3R,4S)-4-hydroxy-L-isoleucine
  • 4-OH-Ile
  • H-Ile(4-OH)-OH
  • (4S)-Hydroxy-L-isoleucine
  • (4S)-4-Hydroxy-L-isoleucine,
  • rel-(2S,3R,4S)-2-A
  • (4S)-4-Hydroxy-L-isoleucine from fenugre
  • rel-(2S,3R,4S)-2-Amino-4-hydroxy-3-methylpentanoicacid
  • (2S,3R,4S)-2-Amino-4-hydroxy-3-methylpentanoic acid (H-L-Ile(4-OH)-OH)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
147.17 g/molcalc.
Exact mass
147.0895 Dacalc.
LogP (octanol/water)
-0.58calc.
Topological polar surface area
83.55 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
3calc.
Heavy atoms
10calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.83calc.
Formal charge
0calc.
Stereocentres
3calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Hydroxyisoleucine suppliers

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All 2 suppliers

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Where suppliers are based

2 suppliers in 1 country

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Hydroxyisoleucine price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Cosmetic ingredient, INCI name HYDROXYISOLEUCINE(humectant, skin conditioning)

Roles

  • eukaryotic metabolite
  • metabolite
  • plant metabolite

Functional uses

  • Humectant
  • Softener and conditioner

Cosmetic functions

  • Humectant
  • Skin conditioning

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Hydroxyisoleucine is traded under.

HS 2922.50Indicative HS code

Amino-alcohol-phenols, amino-acid-phenols and other amino-compounds with oxygen function

World exports in 2024
$3.29B
−5.9% vs 2023, imports $3.19B
2019 to 2024
Top exporters
  1. China39.2%
  2. United Kingdom27.1%
  3. India * partner reported4.8%
Top importers
  1. United States20.7%
  2. Germany7.6%
  3. Italy6.6%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Hydroxyisoleucine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Hydroxyisoleucine, based on the data on this page

What is 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.

What is the CAS number of Hydroxyisoleucine?

The CAS registry number of Hydroxyisoleucine is 55399-93-4. Other or deprecated CAS numbers: 1044661-15-5, 50764-07-3.

What is the molecular formula and weight of Hydroxyisoleucine?

The molecular formula of Hydroxyisoleucine is C6H13NO3 and its molar mass is 147.17 g/mol.

What is Hydroxyisoleucine used for?

Known uses and roles of Hydroxyisoleucine include humectants in cosmetics and personal care, skin conditioning agents in cosmetics and personal care, eukaryotic metabolite, metabolite, plant metabolite and 3 more.

Is Hydroxyisoleucine hazardous?

No GHS hazard classification for Hydroxyisoleucine is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Hydroxyisoleucine?

Hydroxyisoleucine is usually classified under HS code 292250 (Amino-alcohol-phenols, amino-acid-phenols and other amino-compounds with oxygen function). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Hydroxyisoleucine?

CompoundList lists 2 suppliers of Hydroxyisoleucine in China. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Hydroxyisoleucine?

Suppliers quote Hydroxyisoleucine on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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