What is Dipropylene Glycol n-Butyl Ether (DPNB) CAS 29911-28-2?

DPNB is a slow-evaporating, hydrophobic glycol ether with molecular formula C10H22O3 and molecular weight about 190.28 g/mol. It is used as an industrial solvent, coupling agent and coalescent in coatings, inks, cleaners, adhesives and other formulations.

What are the main applications of DPNB?

DPNB is used as a coalescent in waterborne latex coatings and as an active solvent in solvent-borne coatings, printing inks, metal cleaners, hard-surface cleaners, grease and paint removers, adhesives, electronics, textiles, cosmetics and agricultural formulations. It provides solvency, wetting and surface-tension reduction.

How does DPNB CAS 29911-28-2 compare with DPM CAS 34590-94-8?

DPNB is butyl-terminated, so it is more hydrophobic, slower evaporating and less water-soluble than the methyl-terminated DPM. DPM generally evaporates faster and tolerates more water, so the choice depends on resin compatibility, open time and final film balance.

Does CAS 29911-28-2 identify one pure DPNB isomer?

CAS 29911-28-2 identifies the major dipropylene glycol n-butyl ether isomer, while commercial mixed-isomer DPNB may also be described with CAS 35884-42-5. For strict synthesis or regulatory work, specify the exact isomer or mixture and agree on the assay method.

Which physical properties matter when selecting DPNB?

Typical commercial DPNB is a clear liquid with boiling point around 230 C, density about 0.91 g/cm3, flash point around 100 C, viscosity about 4.35 mPa.s at 25 C and aqueous solubility around 40-45 g/L at 25 C. Formulation screening should compare evaporation rate, resin compatibility, water tolerance, colour and distillation profile.

Dipropylene Glycol n-Butyl Ether (DPNB) CAS 29911-28-2

Dipropylene glycol n-butyl ether (DPNB), also known as dipropylene glycol butyl ether, CAS 29911-28-2, is a high-boiling glycol-ether solvent for coatings, inks and industrial cleaners. Industrial grades are controlled by GC purity, water, colour and distillation profile, with COA, TDS and SDS for the agreed solvent grade.

CAS: 29911-28-2
Synonyms: Dipropylene glycol n-butyl ether; DPNB; Dipropylene glycol butyl ether
Einecs: Not specified
Molecular Formula: C10H22O3
Grade: Industrial solvent grade; quality controlled by purity, water, colour and distillation profile
Package: Steel drums, HDPE drums or IBCs; packaging and dangerous-goods classification confirmed from the current SDS
Appearance: Clear colourless liquid
Molecular formula: C10H22O3
Primary role: High-boiling glycol-ether solvent
Quality controls: GC purity, water, APHA colour, acidity and distillation profile
Selection basis: Resin compatibility, evaporation balance and application process

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Product Description

Dipropylene glycol n-butyl ether (DPNB, CAS 29911-28-2) is a glycol-ether solvent used where a relatively slow-evaporating coalescent or coupling-solvent contribution is required. It is considered in coating, ink and industrial-cleaner formulations for its solvent balance and evaporation behaviour, but suitability must be established with the actual resin, pigment package and drying conditions.

1 Applications

2 Specification points

3 Handling

Applications

Industrial and architectural coatings where evaporation balance, flow or film appearance must be adjusted.
Printing inks and coating thinners where resin solvency and drying profile are evaluated together.
Water-based and solvent-based industrial cleaners requiring a glycol-ether coupling solvent.
Adhesive and process formulations where water, alcohol and resin compatibility are checked in the finished blend.

Specification points

For purchasing, define GC purity, water content, APHA colour, acidity, density and distillation range. DPM and dipropylene glycol n-propyl ether are related glycol ethers, but their alkyl groups change evaporation and solvency behaviour.

Handling

Keep containers closed and use the current SDS for ventilation, ignition-source control, storage and transport requirements. Formulation trials should confirm the desired open time and final coating appearance.

FAQ - Technical & Supply Chain

Q:
What is Dipropylene Glycol n-Butyl Ether (DPNB) CAS 29911-28-2?

A: DPNB is a slow-evaporating, hydrophobic glycol ether with molecular formula C10H22O3 and molecular weight about 190.28 g/mol. It is used as an industrial solvent, coupling agent and coalescent in coatings, inks, cleaners, adhesives and other formulations.
Q:
What are the main applications of DPNB?

A: DPNB is used as a coalescent in waterborne latex coatings and as an active solvent in solvent-borne coatings, printing inks, metal cleaners, hard-surface cleaners, grease and paint removers, adhesives, electronics, textiles, cosmetics and agricultural formulations. It provides solvency, wetting and surface-tension reduction.
Q:
How does DPNB CAS 29911-28-2 compare with DPM CAS 34590-94-8?

A: DPNB is butyl-terminated, so it is more hydrophobic, slower evaporating and less water-soluble than the methyl-terminated DPM. DPM generally evaporates faster and tolerates more water, so the choice depends on resin compatibility, open time and final film balance.
Q:
Does CAS 29911-28-2 identify one pure DPNB isomer?

A: CAS 29911-28-2 identifies the major dipropylene glycol n-butyl ether isomer, while commercial mixed-isomer DPNB may also be described with CAS 35884-42-5. For strict synthesis or regulatory work, specify the exact isomer or mixture and agree on the assay method.
Q:
Which physical properties matter when selecting DPNB?

A: Typical commercial DPNB is a clear liquid with boiling point around 230 C, density about 0.91 g/cm3, flash point around 100 C, viscosity about 4.35 mPa.s at 25 C and aqueous solubility around 40-45 g/L at 25 C. Formulation screening should compare evaporation rate, resin compatibility, water tolerance, colour and distillation profile.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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