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Carboxylic acids and anhydrides

Pivalic acid

Also known as Trimethylacetic acid, 2,2-Dimethylpropanoic acid, 2,2-Dimethylpropionic acid

CAS 75-98-9Formula C5H10O2Molar mass 102.13 g/molEC 200-922-5
GHS signal word: Danger. Pictograms: Corrosive, Harmful or irritant 36 suppliers listed
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Pivalic acid chemical structure, C5H10O2, CAS 75-98-9
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless cyrstals
Melting point
35.5 °C
Boiling point
163.8 °C
Density
Relative density (water = 1): 0.91
Flash point
64 °C
HS code
291560
Category
Carboxylic acids and anhydrides
UN number
UN 3261
Illustrative photo, colourless crystals in small glass vials on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Pivalic acid?

Plain description, key identifiers and synonyms

Pivalic acid is a branched, short-chain fatty acid composed of propanoic acid having two methyl substituents at the 2-position. It is a short-chain fatty acid, a branched-chain saturated fatty acid and a methyl-branched fatty acid. It is a conjugate acid of a pivalate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2,2-dimethylpropanoic acid
CAS number
75-98-9 CAS number cross-checked
EC number
200-922-5
Molecular formula
C5H10O2
UNII
813RE8BX41
MDL number
MFCD00004194
InChIKey
IUGYQRQAERSCNH-UHFFFAOYSA-N
InChI
InChI=1S/C5H10O2/c1-5(2,3)4(6)7/h1-3H3,(H,6,7)
SMILES (canonical and isomeric)
CC(C)(C)C(=O)O

Synonyms

  • Trimethylacetic acid
  • 2,2-Dimethylpropanoic acid
  • 2,2-Dimethylpropionic acid
  • Neopentanoic acid
  • tert-Pentanoic acid
  • Propanoic acid, 2,2-dimethyl-
  • Versatic 5
  • Kyselina pivalova
  • alpha,alpha-Dimethylpropionic acid
  • 2,2-dimethyl-propanoic acid
  • Acetic acid, trimethyl-
  • 2,2-dimethyl-propionic acid
  • Dimethylpropionic acid
  • acide pivalique
  • acido pivalico
  • Kyselina 2,2-dimethylpropionova
  • Neovaleric acid
  • Propionic acid, 2,2-dimethyl-
  • tert-C4H9COOH
  • acide 2,2-dimethylpropanoique
  • pivalicacid
  • Trimethyl-aceticaci
  • Pivalinsaeure
  • Pivalinsaure
  • pivaloic acid
Show all 34 synonyms
  • PivOH
  • PIV
  • trimethyl acetic acid
  • trimethyl-acetic acid
  • Pivalic acid, 99%
  • tert-Butyl carboxylic acid
  • 2,2,-dimethylpropionic acid
  • 2,2,2-trimethylacetic acid
  • 4-02-00-00908 (Beilstein Handbook Reference)

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 cyrstalsexp.
Melting point
35.5 °Cexp.
Boiling point
163.8 °Cexp.
Density
Relative density (water = 1): 0.91exp.
Flash point
64 °Cexp.
Autoignition temperature
560 °Cexp.
Solubility
1 g dissolves in 40 ml water, freely sol in alcohol, etherexp.
Vapour pressure
0.5 mm Hg at 25 °C (ext)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
102.13 g/molcalc.
Exact mass
102.0681 Dacalc.
LogP (octanol/water)
1.12calc.
Topological polar surface area
37.3 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
7calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.8calc.
Formal charge
0calc.
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

GHS signal word
Danger
GHS05: Corrosive
Corrosive
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
  • H312Harmful in contact with skin.
  • H314Causes severe skin burns and eye damage.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H332Harmful if inhaled.
Precautionary statements (24)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P352If on skin: Wash with plenty of water.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • 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.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • 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.
  • P363Wash contaminated clothing before reuse.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3261
Transport hazard class
8
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

Pivalic acid suppliers

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

All 36 suppliers
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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

36 suppliers in 8 countries

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Pivalic acid 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

Intermediate, as a replacement for some natural materials.

Finds numerous uses in the production of polymers and resins, pharmaceuticals, agricultural chemicals, cosmetics, fuels, lubricants and transmission fluids.

Prodrug ... to improve the bioavailability of therapeutic candidates.

Veterinary medication:.

Industrial uses: Intermediate.

How it is made

Prepared by the reaction of tert-butylmagnesium chloride and carbon dioxide.

From isobutylene or diisobutylene with carbon monoxide and water at a temperature below 100 °C and elevated carbon monoxide pressure.

The Koch-Haaf reaction can be used to prepare trimethylacetic acid from 2-methyl-1-propanol and 2-methyl-2-propanol by the addition of carbon monoxide in the presence of sulfuric acid. With readily available 2-methyl-1-propanol (isobutanol) from the oxo synthesis, trimethylacetic acid can be obtained in 89% yield.

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 Pivalic acid is traded under.

HS 2915.60Indicative HS code

Butanoic acids, pentanoic acids, their salts and esters

World exports in 2024
$704M
+7.9% vs 2023, imports $679M
2019 to 2024
Top exporters
  1. China24.0%
  2. United States23.0%
  3. Netherlands9.3%
Top importers
  1. India * partner reported9.8%
  2. United States9.7%
  3. Netherlands7.4%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Pivalic acid, based on the data on this page

What is Pivalic acid?

Pivalic acid is a branched, short-chain fatty acid composed of propanoic acid having two methyl substituents at the 2-position. It is a short-chain fatty acid, a branched-chain saturated fatty acid and a methyl-branched fatty acid. It is a conjugate acid of a pivalate.

What is the CAS number of Pivalic acid?

The CAS registry number of Pivalic acid is 75-98-9.

What is the molecular formula and weight of Pivalic acid?

The molecular formula of Pivalic acid is C5H10O2 and its molar mass is 102.13 g/mol.

What is Pivalic acid used for?

Intermediate, as a replacement for some natural materials. Finds numerous uses in the production of polymers and resins, pharmaceuticals, agricultural chemicals, cosmetics, fuels, lubricants and transmission fluids. Prodrug ... to improve the bioavailability of therapeutic candidates. Veterinary medication:.

Is Pivalic acid hazardous?

Pivalic acid carries the GHS signal word "Danger". Main hazards: harmful if swallowed, harmful in contact with skin, causes severe skin burns and eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Pivalic acid?

Pivalic acid is usually classified under HS code 291560 (Butanoic acids, pentanoic acids, their salts and esters). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Pivalic acid?

CompoundList lists 36 suppliers of Pivalic acid in China, United States, India, Belgium and 4 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Pivalic acid in India?

4 suppliers in India list Pivalic acid on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Pivalic acid?

Suppliers quote Pivalic acid 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 Pivalic acid

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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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