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Glycol Ether DPNB is dipropylene glycol mono-n-butyl ether, a propylene glycol-based solvent typically supplied as a mixture of structural isomers.
Glycol Ether DPNB combines ether groups and a terminal hydroxyl group with a hydrophobic butyl chain, providing useful resin solvency and coupling behavior.
Glycol Ether DPNB principally serves as a coating coalescent and a slow-evaporating solvent in cleaning products, inks, and selected adhesive formulations.
CAS Number: 29911-28-2
EC Number: 249-951-5
Molecular Formula: C₁₀H₂₂O₃
Molecular Weight: 190.28 g/mol
Synonyms: Dipropylene Glycol n-Butyl Ether, Dipropylene Glycol Mono-n-Butyl Ether, Dipropylene Glycol Monobutyl Ether, Dipropylene Glycol Butyl Ether, Dipropylene Glycol Normal Butyl Ether, Di(propylene Glycol) Butyl Ether, Butyl Dipropylene Glycol Ether, Butyl Propylene Diglycol, Normal Butoxy Propoxy Propanol, n-Butoxy-Propoxy-Propanol, n-Butoxy-Methylethoxy-Propanol, 1-(2-Butoxy-1-methylethoxy)propan-2-ol, 2-Propanol, 1-(2-butoxy-1-methylethoxy)-, 1-(1-Butoxy-2-propoxy)-2-propanol, 1-(1-Methyl-2-butoxy-ethoxy)-2-propanol, 5-Methyl-4,7-dioxaundecane-2-ol, DPnB, DPGnBE, Dowanol DPnB, Solvenon DPnB, Arcosolv DPNB, Di(propylene Glycol) Butyl Ether Isomer Mixture, CAS 29911-28-2, EC 249-951-5, PubChem CID 24752, UNII T6ECP5S4P4, MDL MFCD00192112, InChIKey CUVLMZNMSPJDON-UHFFFAOYSA-N, C₁₀H₂₂O₃, DPNB Coalescing Solvent, Dipropylene Glycol Mono-n-Butyl Ether, Dipropylene Glycol Normal Butyl Ether, Dipropylene Glycol Butoxy Ether, Di(propylene Glycol) Butyl Ether, Di(propylene Glycol) Monobutyl Ether, Di(propylene Glycol) n-Butyl Ether, 1-(2-Butoxy-1-methylethoxy)propan-2-ol, 1-(2-Butoxy-1-methylethoxy)-2-propanol, 2-Propanol, 1-(2-butoxy-1-methylethoxy)-, 1-(1-Butoxypropan-2-yloxy)propan-2-ol, 1-(1-Butoxy-2-propoxy)-2-propanol, 1-(2-Butoxy-1-propoxy)-2-propanol, 1-(1-Methyl-2-butoxyethoxy)-2-propanol, 1-(1-Methyl-2-butoxy-ethoxy)-2-propanol, 5-Methyl-4,7-dioxaundecan-2-ol, 5-Methyl-4,7-dioxaundecane-2-ol, 2-(Butoxypropoxy)-2-propanol, (Butoxypropoxy)propanol, n-Butoxy-methylethoxy-propanol, Butyl Propasol, Butyl Dipropasol, Butyl Dipropasol Solvent, Butyl Propylene Diglycol
APPLICATIONS
Glycol Ether DPNB serves as a coalescing solvent in waterborne latex coatings.
Glycol Ether DPNB promotes polymer-particle deformation and fusion as water leaves the applied film.
Additionally, Glycol Ether DPNB provides temporary plasticization that helps compatible binders form a continuous coating.
Glycol Ether DPNB supports acrylic, styrene–acrylic, and polyvinyl acetate systems, with the required concentration depending on the binder and application conditions.
Glycol Ether DPNB contributes resin solvency to selected industrial coating formulations.
Glycol Ether DPNB provides a slowly evaporating component that remains available during film development.
Moreover, Glycol Ether DPNB can complement faster solvents when a formulation requires a balanced evaporation profile.
Glycol Ether DPNB selection must account for residual solvent, hardness development, and the intended drying conditions.
Glycol Ether DPNB functions as a solvent and coupling agent in hard-surface cleaners.
Glycol Ether DPNB helps mobilize greasy soils and supports soap-scum removal.
In addition, Glycol Ether DPNB lowers surface tension in suitable formulations, assisting contact between the cleaner and contaminated surfaces.
Glycol Ether DPNB has limited water solubility, so surfactants and other formulation ingredients must provide adequate compatibility and stability.
Glycol Ether DPNB is incorporated into selected floor cleaners and wax-stripping products.
Glycol Ether DPNB supplies solvency where extended wet contact is useful.
Furthermore, Glycol Ether DPNB’s slow evaporation supports formulations designed to loosen accumulated residues before removal.
Glycol Ether DPNB requires surface-compatibility evaluation because floor finishes and substrates differ in solvent resistance.
Glycol Ether DPNB participates in printing-ink formulations as a high-boiling solvent.
Glycol Ether DPNB can help control premature drying in selected inkjet systems.
Additionally, Glycol Ether DPNB has been investigated in nonaqueous inks where solvent evaporation influences drying at an exposed printhead.
Glycol Ether DPNB suitability depends on pigment dispersion, binder compatibility, substrate wetting, and the required final drying rate.
Glycol Ether DPNB supports selected adhesive formulations through its solvent and coupling properties.
Glycol Ether DPNB can contribute to compatibility between suitable resin components and the liquid phase.
Moreover, Glycol Ether DPNB provides a slowly evaporating solvent option when application time must be controlled.
Glycol Ether DPNB dosage must preserve the intended drying rate and final bond performance.
Glycol Ether DPNB is available as a laboratory solvent for industrial formulation research.
Glycol Ether DPNB enables studies of solvency, coalescence, and solvent-blend compatibility using a defined commercial grade.
In addition, Glycol Ether DPNB allows researchers to compare the effects of a high-boiling glycol ether with faster-evaporating solvents.
Glycol Ether DPNB laboratory selection should consider isomer composition, water content, purity, and the requirements of the investigation.
Glycol Ether DPNB can function as a formulation solvent in selected agricultural chemical products.
Glycol Ether DPNB is listed within the United States pesticide commodity inert-ingredient framework under its registry-indexed chemical name.
Additionally, Glycol Ether DPNB provides a formulation function rather than establishing pesticidal activity.
Glycol Ether DPNB use remains subject to the exact pesticide registration, permitted use pattern, ingredient requirements, and applicable jurisdiction.
DESCRIPTION
Glycol Ether DPNB belongs to the P-series glycol ethers derived from propylene oxide chemistry.
Glycol Ether DPNB commercial solvent commonly contains several structural isomers rather than one isolated molecular arrangement.
Glycol Ether DPNB isomers share the molecular formula C₁₀H₂₂O₃ and molecular weight of approximately 190.28 g/mol.
Additionally, Glycol Ether DPNB should be distinguished from propylene glycol n-butyl ether, tripropylene glycol n-butyl ether, and diethylene glycol monobutyl ether.
Glycol Ether DPNB appears as a clear, colorless liquid with a mild ether-like odor.
Glycol Ether DPNB has a representative boiling point near 230 °C at atmospheric pressure and a density near 0.91 g/cm³ at room temperature.
Moreover, Glycol Ether DPNB remains liquid at very low temperatures, with freezing behavior reported below approximately −75 °C.
Glycol Ether DPNB evaporates slowly because of its relatively high boiling point and low room-temperature vapor pressure.
Glycol Ether DPNB combines a hydroxyl group capable of hydrogen bonding with ether linkages and a hydrophobic hydrocarbon segment.
Glycol Ether DPNB consequently provides a useful balance between organic-resin affinity and limited compatibility with water.
Furthermore, Glycol Ether DPNB partitions effectively into compatible polymer phases, contributing to coalescence.
Glycol Ether DPNB water compatibility can be increased in formulated systems through appropriate surfactants, alcohols, or other glycol ethers.
Glycol Ether DPNB is combustible, although its flash point near 100 °C places typical grades outside the usual flammable-liquid categories under EU CLP.
Glycol Ether DPNB representative commercial grades are not classified as hazardous under EU CLP, while the current regional supplier SDS controls workplace labeling.
Additionally, Glycol Ether DPNB can still cause discomfort following eye exposure or repeated skin contact.
Glycol Ether DPNB requires separation from strong oxidants, and ether-related peroxide formation must be considered during prolonged storage or solvent concentration.
Glycol Ether DPNB is reported as readily biodegradable in recognized screening tests.
Glycol Ether DPNB nevertheless requires controlled handling to prevent environmental discharge.
Moreover, Glycol Ether DPNB may qualify for particular low-vapor-pressure provisions in United States consumer-product VOC rules.
Glycol Ether DPNB is not universally VOC-exempt, and coating, consumer-product, and regional regulatory definitions must be assessed separately.
PROPERTIES
Product Name: Glycol Ether DPNB
Common Chemical Name: Dipropylene glycol mono-n-butyl ether
Registry-Indexed Name: 2-Propanol, 1-(2-butoxy-1-methylethoxy)-
Systematic Name of Registry-Indexed Isomer: 1-(2-Butoxy-1-methylethoxy)propan-2-ol
Common Abbreviations: DPnB, DPGnBE
Chemical Family: Propylene glycol ethers
Functional Groups: Ether and alcohol
CAS Number: 29911-28-2
EC Number: 249-951-5
PubChem CID: 24752
UNII: T6ECP5S4P4
MDL Number: MFCD00192112
Molecular Formula: C₁₀H₂₂O₃
Molecular Weight: 190.28 g/mol
Generalized Condensed Formula: C₄H₉O–C₃H₆–O–C₃H₆–OH
Commercial Composition: Typically a mixture of dipropylene glycol n-butyl ether structural isomers
Physical State: Liquid
Appearance: Clear and colorless
Odor: Mild, ether-like
Purity: Grade dependent; assess total ether-isomer content separately from individual-isomer purity
Representative Boiling Point: Approximately 230 °C at 101.3 kPa
Representative Freezing Point: Below approximately −75 °C
Representative Density: Approximately 0.907–0.913 g/cm³ at 25 °C
Representative Water Solubility: Approximately 4–5% by weight near 20–25 °C
Representative Vapor Pressure: Approximately 4–5.3 Pa at 20 °C
Representative Dynamic Viscosity: Approximately 4.4–4.9 mPa·s near 25 °C
Representative Closed-Cup Flash Point: Approximately 100 °C
Representative Refractive Index: Approximately 1.426 at 20 °C
Representative Evaporation Rate: Approximately 0.006, with n-butyl acetate = 1
Primary Industrial Functions: Coalescence, resin solvency, coupling, and cleaning solvency
Major Applications: Coatings, hard-surface cleaners, floor-care products, inks, and selected adhesives
EU CLP Classification: Representative grades are not classified as hazardous; verify the current regional SDS
Signal Word: None required for representative unclassified EU grades
Incompatible Materials: Strong oxidizing agents
Storage Sensitivities: Air exposure, moisture uptake, contamination, and excessive heat
Transport Information: Representative grades are not regulated as dangerous goods under ADR, IMDG, or IATA
UN Number: Not assigned for grades transported as non-dangerous goods
Transport Class: Not applicable for non-dangerous-goods grades
Packing Group: Not applicable for non-dangerous-goods grades
Shelf Life: Grade, purity, packaging, storage conditions, and manufacturer dependent
Regulatory Suitability: Application and grade dependent; no universal food, pharmaceutical, cosmetic, or pesticide suitability.
FIRST AID
Inhalation:
Move the affected person to fresh air and allow rest.
Seek medical advice if symptoms develop or persist.
Obtain urgent assistance for breathing difficulty or impaired consciousness.
Skin Contact:
Remove contaminated clothing and wash exposed skin thoroughly with soap and water.
Seek medical advice if irritation persists.
Wash contaminated clothing before reuse.
Eye Contact:
Rinse immediately with clean, gently flowing water for at least 15 minutes, including beneath the eyelids.
Remove contact lenses if present and easy to remove.
Obtain medical attention.
Ingestion:
Rinse the mouth.
Do not induce vomiting.
Contact a poison center or physician if symptoms occur or a significant amount has been swallowed.
Never give anything by mouth to an unconscious person.
Note to Physicians:
Treat symptomatically according to the exposure and clinical findings.
HANDLING AND STORAGE
Handling:
Avoid unnecessary inhalation of vapor or mist and prevent prolonged skin contact.
Use controlled transfer methods and maintain good industrial hygiene.
Wash hands before eating or drinking.
Engineering Controls:
Provide ventilation appropriate to the quantity, temperature, and process.
Use local extraction where heating or spraying increases exposure.
Keep eyewash facilities accessible.
Personal Protection:
Wear chemical-resistant gloves, suitable work clothing, and eye protection.
Select glove materials using verified permeation information for the actual exposure conditions.
Respiratory Protection:
Use an approved organic-vapor respirator when ventilation cannot adequately control exposure.
Add suitable particulate protection where mist is present.
Respirator selection must follow the workplace exposure assessment.
Fire and Static Control:
Keep away from flames, sparks, and unnecessary heat.
Ground and bond containers during bulk transfer where required.
Use suitable electrical equipment where heated solvent or mist could produce an ignitable atmosphere.
A high flash point does not eliminate fire risk.
Storage:
Store in tightly closed, compatible containers in a dry, ventilated area.
Limit prolonged air exposure and prevent water contamination.
Keep separate from strong oxidants.
Material Compatibility:
Carbon steel is identified in technical guidance as a customary bulk-storage material.
Avoid copper and copper-alloy equipment unless compatibility is specifically established.
Verify seals, hoses, and coatings for the intended service.
Peroxide Precautions:
Follow the product SDS and workplace procedures for assessing prolonged storage or solvent-concentration operations.
Do not concentrate aged or suspect ether solvent without an appropriate peroxide assessment.
Spill Procedures:
Control ignition sources and ventilate the area.
Stop the leak if safe and absorb the liquid with sand or another compatible inert absorbent.
Collect residues in labeled, sealable containers.
Environmental Precautions:
Prevent uncontrolled discharge to drains, soil, groundwater, or surface water.
Contain contaminated cleanup water and firefighting runoff.
Fire Response:
Use alcohol-resistant foam, dry chemical, carbon dioxide, or water spray as appropriate.
Firefighters should wear self-contained breathing apparatus and protective clothing.
Combustion can produce carbon monoxide, carbon dioxide, and irritating fumes.
Waste Disposal:
Dispose of solvent residues, absorbents, and contaminated packaging through an authorized waste-management route in accordance with applicable regulations.
