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Carboxylic acids and anhydrides

4-Hydroxybutanoate

Also known as 4-hydroxybutyrate, Hydroxybutyrate, g-hydroxybutyric acid

CAS 1320-61-2Formula C4H7O3-Molar mass 103.10 g/molEC 691-053-4
Prohibited, not for trade
Why it is not for trade
4-Hydroxybutanoate chemical structure, C4H7O3-, CAS 1320-61-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1320-61-2
Formula
C4H7O3-
Molar mass
103.10 g/mol
EC number
691-053-4
HS code
291819
Category
Carboxylic acids and anhydrides

What is 4-Hydroxybutanoate?

Plain description, key identifiers and synonyms

4-hydroxybutyrate is a 4-hydroxy monocarboxylic acid anion resulting from the removal of a proton from the carboxy group of 4-hydroxybutyric acid. It has a role as an intravenous anaesthetic and an anaesthesia adjuvant. It is a 4-hydroxy monocarboxylic acid anion, a short-chain fatty acid anion and a hydroxy fatty acid anion. It is functionally related to a butyrate. It is a conjugate base of a 4-hydroxybutyric acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-hydroxybutanoate
CAS number
1320-61-2 CAS number cross-checkedOther or deprecated CAS: 591-81-1
EC number
691-053-4
Molecular formula
C4H7O3-
InChIKey
SJZRECIVHVDYJC-UHFFFAOYSA-M
InChI
InChI=1S/C4H8O3/c5-3-1-2-4(6)7/h5H,1-3H2,(H,6,7)/p-1
SMILES (canonical and isomeric)
C(CC(=O)[O-])CO

Synonyms

  • 4-hydroxybutyrate
  • Hydroxybutyrate
  • g-hydroxybutyric acid
  • Butyric acid, hydroxy-, ion(1-)
  • Butanoic acid, hydroxy-, ion(1-)
  • Butyric acid, hydroxy, ion(1)
  • Butanoic acid, hydroxy, ion(1)
  • Gamma Hydroxy butyrate

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
103.10 g/molcalc.
Exact mass
103.0401 Dacalc.
LogP (octanol/water)
-1.49calc.
Topological polar surface area
60.36 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
3calc.
Heavy atoms
7calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.75calc.
Formal charge
-1calc.
Stereocentres
0calc.
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.

4-Hydroxybutanoate suppliers

Trading restrictions apply to this substance

Psychotropic substance

4-Hydroxybutanoate is prohibited on CompoundList. Listings, quotes and messages are disabled. This page is kept for information only.

Listing and enquiries are not allowed for this substance.

Reference: UN Convention on Psychotropic Substances 1971 Schedule II

Our policy on controlled substances

4-Hydroxybutanoate price

Indicative price range per kg from live supplier offers

Prices are not shown for prohibited substances.

Uses and applications

What the substance is used for, by industry and function

Roles

  • adjuvant
  • anaesthesia adjuvant
  • anaesthetic
  • general anaesthetic
  • intravenous anaesthetic
  • pharmaceutical

Regulatory status

Inventories, regulations and trade controls that list this substance

Psychotropic substance

4-Hydroxybutanoate is prohibited on CompoundList. Listings, quotes and messages are disabled. This page is kept for information only.

Listing and enquiries are not allowed for this substance.

Reference: UN Convention on Psychotropic Substances 1971 Schedule II

Our policy on controlled substances

Controls

  • US DEA controlled substance or listed chemical

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 4-Hydroxybutanoate is traded under.

HS 2918.19Indicative HS code

Carboxylic acids with alcohol function but without other oxygen function, their…

World exports in 2024
$1.37B
+0.5% vs 2023, imports $1.18B
2019 to 2024
Top exporters
  1. China23.7%
  2. Italy14.7%
  3. India * partner reported12.0%
Top importers
  1. Germany11.7%
  2. South Korea9.8%
  3. Italy9.6%

* Partner reported figures, a lower bound.

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

The HS code shown for 4-Hydroxybutanoate is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 4-Hydroxybutanoate, based on the data on this page

What is 4-Hydroxybutanoate?

4-hydroxybutyrate is a 4-hydroxy monocarboxylic acid anion resulting from the removal of a proton from the carboxy group of 4-hydroxybutyric acid. It has a role as an intravenous anaesthetic and an anaesthesia adjuvant.

What is the CAS number of 4-Hydroxybutanoate?

The CAS registry number of 4-Hydroxybutanoate is 1320-61-2. Other or deprecated CAS numbers: 591-81-1.

What is the molecular formula and weight of 4-Hydroxybutanoate?

The molecular formula of 4-Hydroxybutanoate is C4H7O3- and its molar mass is 103.10 g/mol.

What is 4-Hydroxybutanoate used for?

Known uses and roles of 4-Hydroxybutanoate include building blocks in research and laboratory, adjuvant, anaesthesia adjuvant, anaesthetic, general anaesthetic and 2 more.

Is 4-Hydroxybutanoate hazardous?

No GHS hazard classification for 4-Hydroxybutanoate 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 4-Hydroxybutanoate?

4-Hydroxybutanoate is usually classified under HS code 291819 (Carboxylic acids with alcohol function but without other oxygen function, their…). This is indicative, confirm it with your customs broker before shipping.

Can I buy 4-Hydroxybutanoate on CompoundList?

No. 4-Hydroxybutanoate is on our prohibited list, so listings, quotes and messages for it are disabled. This page is kept for information only.

Guides for buyers

Practical guides that help when you source, ship or handle 4-Hydroxybutanoate

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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