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Heterocyclic building blocks

Butopyronoxyl

Also known as Indalone, BMOO, Butyl mesityl oxide oxalate

CAS 532-34-3Formula C12H18O4Molar mass 226.27 g/molEC 208-535-3
GHS signal word: Warning. Pictograms: Harmful or irritant
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Butopyronoxyl chemical structure, C12H18O4, CAS 532-34-3
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Yellow to pale reddish-brown liquid
Boiling point
256 to 270
Density
1.052-1.060 @ 25 °C/25 °C
Solubility
Practically insol in water, miscible with alcohol, chloroform, ether, glacial acetic acid
HS code
293299
Category
Heterocyclic building blocks
Illustrative photo, steel drums with a pale yellow liquid sample in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Butopyronoxyl?

Plain description, key identifiers and synonyms

Butopyronoxyl is a member of pyrans and a carbonyl compound.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
butyl 2,2-dimethyl-4-oxo-3H-pyran-6-carboxylate
CAS number
532-34-3 CAS number cross-checked
EC number
208-535-3
Molecular formula
C12H18O4
UNII
4I5PG5VZ0V
MDL number
MFCD00006574
InChIKey
OKIJSNGRQAOIGZ-UHFFFAOYSA-N
InChI
InChI=1S/C12H18O4/c1-4-5-6-15-11(14)10-7-9(13)8-12(2,3)16-10/h7H,4-6,8H2,1-3H3
SMILES (canonical and isomeric)
CCCCOC(=O)C1=CC(=O)CC(O1)(C)C

Synonyms

  • Indalone
  • BMOO
  • Butyl mesityl oxide oxalate
  • ENT 9
  • Butyl mesityl oxide
  • Butylmesityl oxide oxalate
  • n-Butylmesityloxid oxalate
  • n-Butyl mesityl oxide oxalate
  • Butyl 3,4-dihydro-2,2-dimethyl-4-oxo-2H-pyran-6-carboxylate
  • 2-Carbo-N-butoxy-6,6-dimethyl-5,6-dihydro-1,4-pyrone
  • Butyl-3,4-dihydro-2,2-dimethyl-4-oxo-2H-pyran-6-carboxylate
  • Butyl dihydro-6,6-dimethyl-4-oxopyran-2-carboxylate
  • 2H-Pyran-6-carboxylic acid, 3,4-dihydro-2,2-dimethyl-4-oxo-, butyl ester
  • n-Butyl ester of 3,4-dihydro-2,2-dimethyl-4-oxo-2H-pyran-6-carboxylic acid
  • alpha,alpha-Dimethyl-alpha'-carbobutoxy-dihydro-gamma-pyrone
  • Butyl 5,6-dihydro-6,6-dimethyl-4-oxo-4H-pyran-2-carboxylate
  • alpha,alpha-Dimethyl-alpha'-carboxydihydro-gamma-pyrone butyl ester
  • n-Butyl-3,4-dihydro-2,2-dimethyl-4-oxo-1,2H-pyran-6-carboxylate
  • Dihydropyrone
  • butyl 2,2-dimethyl-4-oxo-3H-pyran-6-carboxylate
  • Butyl 2,2-dimethyl-4-oxo-3,4-dihydro-2H-pyran-6-carboxylate
  • 2,2-Dimethyl-6-carbobutoxy-2,3-dihydro-4-pyrone
  • 3,4-Dihydro-2,2-dimethyl-4-oxo-2H-pyran-6-carboxylic acid butyl ester
  • Indalon
  • Butyl 3,4-dihydro-2,2-dimethyl-4-oxo-1-2H-pyran-6-carboxylate
Show all 36 synonyms
  • 3,4-Dihydro-2,2-dimethyl-4-oxo-2H-pyran-6-carboxylic acid, n-butyl ester
  • 2,3-dihydro-4-pyrone
  • Butyldimethyldihydro-gamma-pyrone carboxylate
  • Indalone, NSC 404420, NSC 5750, BMOO
  • 2-Carbo-n-butoxy-6,6-dihydro-1,4-pyrone
  • Butyl 3,2-dimethyl-4-oxo-2H-pyran-6-carboxylate
  • Butyl 3,2-dimethyl-4-oxo-1-2H-pyran-6-carboxylate
  • butyl 6,6-dimethyl-4-oxo-5H-6-hydropyran-2-carboxylate
  • Butyl dimethyl dihydro-pyrone carboxylate
  • 3,2-dimethyl-4-oxo-2H-pyran-6-carboxylic acid, n-butyl ester
  • n-Butyl ester of 3,2-dimethyl-4-oxo-2H-pyran-6-carboxylic 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

Appearance
Yellow to pale reddish-brown liquidexp.
Odour
Aromatic odorexp.
Boiling point
256 to 270exp.
Density
1.052-1.060 @ 25 °C/25 °Cexp.
Solubility
Practically insol in water, miscible with alcohol, chloroform, ether, glacial acetic acidexp.

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
226.27 g/molcalc.
Exact mass
226.1205 Dacalc.
LogP (octanol/water)
1.98calc.
Topological polar surface area
52.6 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
4calc.
Heavy atoms
16calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.67calc.
Formal charge
0calc.
Stereocentres
0calc.
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, O=C1C=COCC1

O=C1C=COCC1

1 ring, 7 atoms, the 3,4-Dihydro-2H-pyran-4-one ring system.

95 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

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

Full safety data and first aid

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Butopyronoxyl price

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Uses and applications

What the substance is used for, by industry and function

The active ingredient is no longer contained in any registered pesticide products ... "cancelled.".

Insect repellents (indalone) are intended for application to human skin ...

(Among) better repellents for ticks ...

How it is made

Prepared by condensation of mesityl oxide with dibutyl oxalate in the presence of sodium ethoxide.

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Inactive in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2932.99Indicative HS code

Heterocyclic compounds with oxygen hetero-atom(s) only, other

World exports in 2024
$3.81B
+10.3% vs 2023, imports $7.05B
2019 to 2024
Top exporters
  1. China28.9%
  2. Switzerland * partner reported12.7%
  3. Germany7.8%
Top importers
  1. United States49.7%
  2. China11.9%
  3. India * partner reported3.3%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Butopyronoxyl?

Butopyronoxyl is a member of pyrans and a carbonyl compound.

What is the CAS number of Butopyronoxyl?

The CAS registry number of Butopyronoxyl is 532-34-3.

What is the molecular formula and weight of Butopyronoxyl?

The molecular formula of Butopyronoxyl is C12H18O4 and its molar mass is 226.27 g/mol.

What is Butopyronoxyl used for?

The active ingredient is no longer contained in any registered pesticide products ... "cancelled.". Insect repellents (indalone) are intended for application to human skin ... (Among) better repellents for ticks ...

Is Butopyronoxyl hazardous?

Butopyronoxyl carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Butopyronoxyl?

Butopyronoxyl is usually classified under HS code 293299 (Heterocyclic compounds with oxygen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Butopyronoxyl?

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What is the price of Butopyronoxyl?

Suppliers quote Butopyronoxyl 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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