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Aliphatic and alicyclic building blocks

Auxin

Also known as Auxin a, 5-(3,5-Di-sec-butylcyclopent-1-enyl)-2,3,5-trihydroxyvaleric acid, Acids, Indoleacetic

CAS 491-14-5Formula C18H32O5Molar mass 328.45 g/molEC 207-731-6
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Auxin chemical structure, C18H32O5, CAS 491-14-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
491-14-5
Formula
C18H32O5
Molar mass
328.45 g/mol
EC number
207-731-6
HS code
291819
Category
Aliphatic and alicyclic building blocks

What is Auxin?

Plain description, key identifiers and synonyms

Auxin a is a carbocyclic compound that is 3,5-di-sec-butylcyclopentene which is substituted by a 4-carboxy-1,3,4-trihydroxybutyl group at position 1. It is a secondary allylic alcohol, a carbocyclic compound and a hydroxy monocarboxylic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
5-[3,5-di(butan-2-yl)cyclopenten-1-yl]-2,3,5-trihydroxypentanoic acid
CAS number
491-14-5 CAS number cross-checked
EC number
207-731-6
Molecular formula
C18H32O5
InChIKey
RKOUCPMGBBKLNK-UHFFFAOYSA-N
InChI
InChI=1S/C18H32O5/c1-5-10(3)12-7-13(11(4)6-2)14(8-12)15(19)9-16(20)17(21)18(22)23/h8,10-13,15-17,19-21H,5-7,9H2,1-4H3,(H,22,23)
SMILES (canonical and isomeric)
CCC(C)C1CC(C(=C1)C(CC(C(C(=O)O)O)O)O)C(C)CC

Synonyms

  • Auxin a
  • 5-(3,5-Di-sec-butylcyclopent-1-enyl)-2,3,5-trihydroxyvaleric acid
  • Acids, Indoleacetic
  • 5-[3,5-di(butan-2-yl)cyclopenten-1-yl]-2,3,5-trihydroxypentanoic acid
  • 5-[3,5-bis(butan-2-yl)cyclopent-1-en-1-yl]-2,3,5-trihydroxypentanoic acid
  • 4-Deoxy-5-C-[3,5-di(butan-2-yl)cyclopent-1-en-1-yl]pentonic acid

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
328.45 g/molcalc.
Exact mass
328.225 Dacalc.
LogP (octanol/water)
2.2calc.
Topological polar surface area
97.99 Ųcalc.
Hydrogen bond donors
4calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
9calc.
Heavy atoms
23calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.83calc.
Formal charge
0calc.
Stereocentres
7calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, C1=CCCC1

C1=CCCC1

1 ring, 5 atoms, the Cyclopentene ring system.

1,868 other chemicals share this scaffold

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.

Auxin suppliers

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  • EvitaChem
    China, BeijingUnclaimed profile
    AuxinGrade, purity and minimum order on request
    Price on request
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Auxin 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

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Auxin 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 Auxin is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Auxin?

Auxin a is a carbocyclic compound that is 3,5-di-sec-butylcyclopentene which is substituted by a 4-carboxy-1,3,4-trihydroxybutyl group at position 1. It is a secondary allylic alcohol, a carbocyclic compound and a hydroxy monocarboxylic acid.

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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