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Alcohol and glycol solvents

1,5-Pentanediol

Also known as Pentane-1,5-diol, 1,5-Dihydroxypentane, Pentamethylene glycol

CAS 111-29-5Formula C5H12O2Molar mass 104.15 g/molEC 203-854-4
GHS signal word: Warning. Pictograms: Harmful or irritant 19 suppliers listed
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1,5-Pentanediol chemical structure, C5H12O2, CAS 111-29-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Viscous, oily liquid
Melting point
-18 °C
Boiling point
240 °C
Density
0.9941 g/cm cu at 20 °C, 0.9858 g/cm cu at 25 °C
Flash point
129 °C
HS code
290539
Category
Alcohol and glycol solvents
Illustrative photo, closed blue jerry cans in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is 1,5-Pentanediol?

Plain description, key identifiers and synonyms

Pentane-1,5-diol is a primary alcohol.

1,5-Pentanediol is an aliphatic diol compound.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
pentane-1,5-diol
CAS number
111-29-5 CAS number cross-checkedOther or deprecated CAS: 31784-47-1
EC number
203-854-4
Molecular formula
C5H12O2
UNII
07UXZ0SCST
MDL number
MFCD00002978
INCI name
1,5-PENTANEDIOL
InChIKey
ALQSHHUCVQOPAS-UHFFFAOYSA-N
InChI
InChI=1S/C5H12O2/c6-4-2-1-3-5-7/h6-7H,1-5H2
SMILES (canonical and isomeric)
C(CCO)CCO

Synonyms

  • Pentane-1,5-diol
  • 1,5-Dihydroxypentane
  • Pentamethylene glycol
  • 1,5-Pentamethylene glycol
  • 1,5-Pentylene glycol
  • alpha,omega-Pentanediol
  • 1,5-Pentandiol
  • 1,5 Pentanediol
  • 1.5-pentanediol
  • pentan-1,5-diol
  • 1,5-pentane diol
  • omega-Pentanediol
  • Pentane diol-1,5
  • 1,5-Pentanediol, 96%
  • HO(CH2)5OH
  • 4-01-00-02540 (Beilstein Handbook Reference)
  • 1,5-Pentanediol, purum, >=95.0% (GC)
  • 1,5-Pentanediol, purum, >=97.0% (GC)
  • 1,5-Pentanediol Solution in Methanol, 100ug/mL
  • 1,5-Pentanediol, Vetec(TM) reagent grade, 96%

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
Viscous, oily liquidexp.
Taste
Bitter tasteexp.
Melting point
-18 °Cexp.
Boiling point
240 °Cexp.
Density
0.9941 g/cm cu at 20 °C, 0.9858 g/cm cu at 25 °Cexp.
Flash point
129 °Cexp.
Autoignition temperature
335 °Cexp.
Solubility
Miscible with waterexp.
Vapour pressure
3.90 × 10⁻³ mm Hg at 25 °Cexp.

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
104.15 g/molcalc.
Exact mass
104.0837 Dacalc.
LogP (octanol/water)
0.14calc.
Topological polar surface area
40.46 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
4calc.
Heavy atoms
7calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
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
Warning
GHS07: Harmful or irritant
Harmful or irritant
110NFPA 704 rating

Hazard statements

  • H302Harmful if swallowed.
Precautionary statements (5)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • 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

1,5-Pentanediol suppliers

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

All 19 suppliers
19 of 19 offers

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

19 suppliers in 8 countries

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1,5-Pentanediol 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

1,5-Pentanediol is used as a building block in the production of polyesters, thermoplastic polyurethanes, and plasticizers. The linear structure with an uneven number of carbon atoms gives rise to a relatively low viscosity and glass transition temperature (Tg) and good flexibility. 1,5-Pentanediol is also used as an intermediate for dyes and of pharmaceuticals and pesticides. It can be used, for example, for the production of various heterocyclic compounds, such as 1-methylpiperidine.

As a plasticizer in cellulose products and adhesives, in brake fluid compositions. Forms esters and polyesters which can be used as plasticizers, emulsifying agents and resin intermediates.

1,5-Pentanediol has been reported to have antimicrobial and antifungal properties in pharmaceutical applications. Additionally, 1,5-Pentanediol has reported uses in products for hair loss, cold sores, nail problems, dry and scaly feet, and eczema, it can be used as a moisturizing substance and solvent.

Industrial uses: Solvent, Intermediate.

Consumer uses: Diluent.

Cosmetic ingredient, INCI name 1,5-PENTANEDIOL(solvent, solvent)

Functional uses

  • Humectant
  • Softener and conditioner
  • Solvent

Cosmetic functions

  • Solvent

How it is made

1,5-Pentanediol usually is produced by catalytic hydrogenation of glutaric acid or of its esters, e.g., dimethyl glutarate, although dicarboxylic acid mixtures containing glutaric acid also may be used, giving typically a mixture of 1,4-butanediol, 1,5-pentanediol, and 1,6-hexanediol.

Prepd by hydrogenolysis of tetrahydrofurfuryl alcohol in the presence of copper chromite.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

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 1,5-Pentanediol is traded under.

HS 2905.39Indicative HS code

Diols, other

World exports in 2024
$1.92B
−3.5% vs 2023, imports $2B
2019 to 2024
Top exporters
  1. China22.3%
  2. United States17.9%
  3. Germany16.1%
Top importers
  1. Germany12.0%
  2. China11.3%
  3. South Korea10.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for 1,5-Pentanediol is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 1,5-Pentanediol, based on the data on this page

What is 1,5-Pentanediol?

Pentane-1,5-diol is a primary alcohol.

What is the CAS number of 1,5-Pentanediol?

The CAS registry number of 1,5-Pentanediol is 111-29-5. Other or deprecated CAS numbers: 31784-47-1.

What is the molecular formula and weight of 1,5-Pentanediol?

The molecular formula of 1,5-Pentanediol is C5H12O2 and its molar mass is 104.15 g/mol.

What is 1,5-Pentanediol used for?

1,5-Pentanediol is used as a building block in the production of polyesters, thermoplastic polyurethanes, and plasticizers. The linear structure with an uneven number of carbon atoms gives rise to a relatively low viscosity and glass transition temperature (Tg) and good flexibility.

Is 1,5-Pentanediol hazardous?

1,5-Pentanediol carries the GHS signal word "Warning". Main hazards: harmful if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 1,5-Pentanediol?

1,5-Pentanediol is usually classified under HS code 290539 (Diols, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 1,5-Pentanediol?

CompoundList lists 19 suppliers of 1,5-Pentanediol in China, United States, Germany, Canada and 4 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of 1,5-Pentanediol?

Suppliers quote 1,5-Pentanediol 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 1,5-Pentanediol

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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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