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    used in heavy-duty cleaning formulations.

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    A fast-evaporating, hydrophobic glycol ether with high solvency and excellent coupling abilities. It is partly water soluble and miscible with most organic solvents. This is extensively used in heavy-duty cleaning formulations.


    • Textiles
    • Cosmetics
    • Resins
    • Coating formulation and application
    • Industrial, automotive and architectural coatings
    • Glass and all-purpose cleaners where heightened results can be seen in combination with selected other glycol ether solvents
    • Various household and industrial cleaners as a coupling agent and solvent
    • Grease and paint removers as a coupling agent and solvent
    • Metal and hard surface cleaners as a coupling agent and solvent
    • Water-reducible aerosol paint formulations as a coupling cosolvent
    • Effective coalescents in water-borne latex coatings while belended with other P-series glycol ethers
    • Good for removing soap scum and greasy soils in cleaning applications


    • Favorable enviornmental profile, superior performance for end use applications, formulations may require less Performance solvent than P or E Series


    These values are typical properties and are not intended for use in preparing specifications.

    • BiodegradibilityReadily
    • Boiling Point (°C @760mmHg)171
    • CAS#5131-66-8
    • Chemical NamePropylene glycol mono n-butyl ether
    • ChemistryPO
    • Consumer Products US EPA LVP ExemptionVOC
    • Density (25°C) in lb/gal (g/cc)7.3 (0.875)
    • EPA Method 24 (ASTM 26886)VOC
    • Evaporation Rate (n-butyl acetate=1.0)0.093
    • Flash Point, Closed Cup63 °C
    • Freezing Point °F(°C)<-112 (< -80)
    • Hansen Solubility Parameter, dD (joules/cm3)1/215.2
    • Hansen Solubility Parameter, dH (joules/cm3)1/210.5
    • Hansen Solubility Parameter, dP (joules/cm3)1/24.2
    • HAPs (Title III Clean Air Act)No
    • Low Vapor Pressure (<0.1 mmHg @20°C)Non-Exempt
    • Molecular Weight132.2 g/mol
    • SARA Title IIINo
    • SeriesP-Series
    • Solubility in Water (25°C)5.5 wt%
    • Solubility Water in (25°C)15.5 wt%
    • Specific Gravity (25°C)0.878
    • Surface Tension (1% actives, 25 °C)27.5 dynes/cm
    • US EPA ListingNon-food Use
    • Vapor Pressure (mmHg @ 20°C)0.85
    • Viscosity (25°C)2.8 cP

    Strength in solubility

    Found in glass and all-purpose cleaners, PnB is a fast-evaporating glycol ether with an excellent balance of hydrophilic and hydrophobic character. With outstanding soil removal and coupling properties, it takes the lead as Dow’s most hydrophobic glycol ether and still maintains complete water solubility.

    This P-series product delivers fast evaporation and a heightened ability to solubilize organic soils, making it useful in a wide variety of formulation systems.

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