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2-Methylpentaldehyde

Also known as 2-Methylpentanal, 2-Methylvaleraldehyde, Methyl valeraldehyde

CAS 123-15-9Formula C6H12OMolar mass 100.16 g/molEC 204-605-2
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant 2 suppliers listed
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2-Methylpentaldehyde chemical structure, C6H12O, CAS 123-15-9
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless liquid
Melting point
-100 °C
Boiling point
117 °C
Density
0.8092
Flash point
20 °C
HS code
291219
Category
Flavor ingredients
UN number
UN 2367
Illustrative photo, 200 litre steel drums of liquid in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is 2-Methylpentaldehyde?

Plain description, key identifiers and synonyms

2-Methylpentanal is a 2-methyl-branched fatty aldehyde.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-methylpentanal
CAS number
123-15-9 CAS number cross-checkedOther or deprecated CAS: 73513-30-1
EC number
204-605-2
Molecular formula
C6H12O
UNII
64L45T2504
MDL number
MFCD00006986
InChIKey
FTZILAQGHINQQR-UHFFFAOYSA-N
InChI
InChI=1S/C6H12O/c1-3-4-6(2)5-7/h5-6H,3-4H2,1-2H3
SMILES (canonical and isomeric)
CCCC(C)C=O

Synonyms

  • 2-Methylpentanal
  • 2-Methylvaleraldehyde
  • Methyl valeraldehyde
  • Pentanal, 2-methyl-
  • 2-Formylpentane
  • Valeraldehyde, 2-methyl-
  • 2-Methylvaleric aldehyde
  • alpha-Methylpentanal
  • alpha-Methylpentenal
  • 2-Methyl valeraldehyde
  • alpha-Methylvaleraldehyde
  • Ftzilaqghinqqr-uhfffaoysa-
  • 2methylpentanal
  • 2Formylpentane
  • alphaMethylpentanal
  • Pentanal, 2methyl
  • 2Methylvaleraldehyde
  • alphaMethylvaleraldehyde
  • 2Methylvaleric aldehyde
  • Valeraldehyde, 2methyl
  • (+-)-2-Methylpentanal
  • Valeraldehyde, 2-methyl-(8CI)
  • Methyl valeraldehyde (alpha)
  • Pentanal, methyl-
  • Methylpentaldehyde
Show all 34 synonyms
  • 2-methyl-pentanal
  • 2-Methylpental
  • 2-Methyl-n-valeraldehyde
  • n-C3H7CH(CH3)CHO
  • 2-Methylvaleraldehyde (>90%)
  • methyl-pentanal
  • 2-methyl pentanal
  • alpha -methylpentenal
  • 2-methylpentan-1-al

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
Colorless liquidexp.
Odour
REMINISCENT OF HAM & CHEESEexp.
Taste
WOODY, OILY HAM TASTEexp.
Melting point
-100 °Cexp.
Boiling point
117 °Cexp.
Density
0.8092exp.
Flash point
20 °Cexp.
Solubility
Sol in water, ether, acetone, slightly sol in carbon tetrachloride.exp.

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
100.16 g/molcalc.
Exact mass
100.0888 Dacalc.
LogP (octanol/water)
1.62calc.
Topological polar surface area
17.07 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
3calc.
Heavy atoms
7calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.83calc.
Formal charge
0calc.
Stereocentres
1calc.
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

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant
321NFPA 704 rating

Hazard statements

  • H225Highly flammable liquid and vapour.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (20)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • 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.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2367
Transport hazard class
3
Packing group
II

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

2-Methylpentaldehyde suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 2 suppliers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

2 suppliers in 1 country

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2-Methylpentaldehyde price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Flavoring ingredient.

Intermediate for dyes, resins, pharmaceuticals.

Used as insect sex attractant.

Functional uses

  • Flavouring and nutrient
  • Fragrance

How it is made

From 2-methylpentanol by catalytic oxidation.

By aldol condensation of propanal.

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active 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 2-Methylpentaldehyde is traded under.

HS 2912.19Indicative HS code

Acyclic aldehydes without other oxygen function, other

World exports in 2024
$679M
+4.8% vs 2023, imports $743M
2019 to 2024
Top exporters
  1. Germany22.0%
  2. China21.2%
  3. United States18.5%
Top importers
  1. United States13.1%
  2. Germany9.6%
  3. Belgium8.2%
Reported customs values in USD, not prices.Full trade data

The HS code shown for 2-Methylpentaldehyde is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 2-Methylpentaldehyde, based on the data on this page

What is 2-Methylpentaldehyde?

2-Methylpentanal is a 2-methyl-branched fatty aldehyde.

What is the CAS number of 2-Methylpentaldehyde?

The CAS registry number of 2-Methylpentaldehyde is 123-15-9. Other or deprecated CAS numbers: 73513-30-1.

What is the molecular formula and weight of 2-Methylpentaldehyde?

The molecular formula of 2-Methylpentaldehyde is C6H12O and its molar mass is 100.16 g/mol.

What is 2-Methylpentaldehyde used for?

Flavoring ingredient. Intermediate for dyes, resins, pharmaceuticals. Used as insect sex attractant.

Is 2-Methylpentaldehyde hazardous?

2-Methylpentaldehyde carries the GHS signal word "Danger". Main hazards: highly flammable liquid and vapour, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 2-Methylpentaldehyde?

2-Methylpentaldehyde is usually classified under HS code 291219 (Acyclic aldehydes without other oxygen function, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 2-Methylpentaldehyde?

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

What is the price of 2-Methylpentaldehyde?

Suppliers quote 2-Methylpentaldehyde 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

Practical guides that help when you source, ship or handle 2-Methylpentaldehyde

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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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