Laboratory Reagent, ≥99.5%

IPA, Isopropanol, sec-Propyl alcohol, Isopropyl alcohol
Linear Formula:
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
EC Number:
MDL number:
PubChem Substance ID:


Laboratory Reagent

Quality Level

vapor density

2.1 (vs air)

vapor pressure

33 mmHg ( 20 °C)
44 mmHg ( 25 °C)





autoignition temp.

750 °F

expl. lim.

2.0-12.7 %, 93 °C


≤0.2% water

evapn. residue


refractive index

n20/D 1.377 (lit.)


7.0 (20 °C)


82 °C (lit.)


−89.5 °C (lit.)


water: soluble


0.785 g/mL at 25 °C (lit.)

SMILES string




InChI key


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General description

2-Propanol is a secondary alcohol. It has been tested as a substitute to fuel for use in various fuel cells. CuO powder dissolved in 2-propanol has been used for the laser ablation assisted synthesis of Cu colloids. Suspension of 2-propanol with Zn(NO3)2 has been employed for the fabrication of titanium dioxide-coated stainless steel (P25-TiO2/SS) photoanode coated with uniformly thick layer of P25-TiO2. This photoanode was used for the electrochemical photocatalytic (ECPC) degradation process.


2-Propanol (Isopropanol, Isopropyl alcohol) may be used for washing during the synthesis of PolyHIPEs (Polymerized high internal phase emulsion monoliths) of ethylene glycol dimethacrylate (EGDMA) and styrene/divinylbenzene.


1, 4 L in glass bottle
18, 20 L in steel drum


FlameExclamation mark

Signal Word


Hazard Statements


Eye Irrit. 2 - Flam. Liq. 2 - STOT SE 3

Target Organs

Central nervous system


3 - Flammable liquids

WGK Germany


Flash Point(F)

53.6 °F - closed cup

Flash Point(C)

12.0 °C - closed cup

Certificate of Analysis

Certificate of Origin

  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. Who do I contact about larger solvent volume needs?

    Email us at labessentials@sial.com or visit Sigma-Aldrich Fine Chemicals for development and manufacturing-scale inquiries: safcglobal@sial.com

  4. How do I know what packaging options are available for a solvent?

    The Solvent Center gives you the ability to review all the specifications associated with our solvent packaging. This includes physical dimensions, closure types, dispensing methods, UN/DOT Rating as well as solvent compatibility. Visit the Solvent Center.

  5. Who do I contact if I need a solvent blend, which you do not carry?

    Email us at labessentials@sial.com. For a complete listing of all our Solvent blends, visit the Solvent Center

  6. The dispensing of solvents provides some challenges due to the number of container options available. What dispensing options are available for each container?

    The Sigma-Aldrich Solvent Center provides numerous dispensing options for each container type. For a complete listing of all our dispensing options, visit the Solvent Center.

  7. Which solvent grade should I be using for my application?

    Sigma-Aldrich Solvent Applications Table gives a guideline to common applications and the appropriate solvent grades.  Visit: Solvents

  8. What are the options for drying solvents? 

    Sigma-Aldrich offers a full range of high-purity solvents with extremely low water levels specifically manufactured for moisture sensitive Organic and Biotech applications.  Sigma-Aldrich also carries various drying agents such as molecular sieves, which are typically compatible with organic solvents.

  9. What apparatus do you recommend for HPLC solvent filtration?

    The Sigma-Aldrich Vacuum Filtration Assembly gives you all the components you need including: funnel top, fritted glass funnel support, filtration flask, aluminum clamp, and silicone stopper.  The Acrodisc Syringe Filters offer high quality filtration for analytical samples, certified for HPLC to ensure low extractable and available in a broad range of membranes to meet sample compatibility requirements.

  10. Can you recommend a Solvent Extractor for organics from aqueous solution?

    Solvent extractors are often used for the quantitative extraction of organics from aqueous solutions and separations in immunoassays. The MIXXOR system has been applied successfully in many laboratory solvent extraction operations and is ideal for the rapid screening of alternative solvents for specific extraction problems.

Polymerized high internal phase emulsion monoliths for the chromatographic separation of engineered nanoparticles.
Hughes JM, et al.
Journal of Applied Polymer Science, 132(1) (2015)
Formation and characteristics of Cu colloids from CuO powder by laser irradiation in 2-propanol.
Yeh MS, et al.
The Journal of Physical Chemistry B, 103(33), 6851-6857 (1999)
Electrochemical photocatalytic degradation of dye solution with a TiO2-coated stainless steel electrode prepared by electrophoretic deposition.
Lin WC, et al.
Applied Catalysis. B, Environmental, 140, 32-41 (2013)
Evaluation of Ethanol, 1-Propanol, and 2-Propanol in a Direct Oxidation Polymer-Electrolyte Fuel Cell A Real-Time Mass Spectrometry Study.
Wang J, et al.
Journal of the Electrochemical Society, 142(12), Wang J-Wang J (1995)
M Lindberg et al.
Acta dermato-venereologica, 71(5), 384-388 (1991-01-01)
Normal human skin was exposed to two different detergents, sodium lauryl sulphate in distilled water and non-anoic acid in isopropanol at different concentrations. The detergents were applied under occlusion in epicutaneous tests for 24 h and biopsies were taken at...

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