Propylene Glycol Butyl Ether (PNB) 101: Industrial Applications, Specifications, and Supplier Considerations
Propylene Glycol Butyl Ether (PNB) 101: Industrial Applications, Specifications, and Supplier Considerations
Propylene glycol butyl ether (PNB) is a glycol ether solvent with CAS number 15821-83-7. It is used in coatings, printing inks, industrial cleaning agents, degreasers, and electronics-related applications. This primer explains what PNB is, why it matters in 2026, how it is specified and packaged, and how buyers can evaluate suppliers during their initial research.
Why PNB needs a clear definition
Glycol ether names are easily confused. PNB is the common abbreviation for propylene glycol butyl ether, but similar abbreviations exist for other chemicals: DPNB (dipropylene glycol butyl ether, CAS 35884-42-5), TPNB (tripropylene glycol butyl ether, CAS 55934-93-5), DPM (dipropylene glycol monomethyl ether, CAS 34590-94-8), TPM (tripropylene glycol monomethyl ether, CAS 20324-33-8), and DPMA (dipropylene glycol monomethyl ether acetate, CAS 88917-22-0).
For procurement and formulation teams, the problem starts when a request specifies PNB but the supplier does not clearly state the CAS number. A wrong solvent can change drying time, cause film defects, or create cleaning residues. A precise product identity is therefore the first requirement in any purchase.
Buyers in the awareness stage often ask: What is propylene glycol butyl ether? What are its main applications? Is it available in different grades? Does the supplier meet compliance requirements? The rest of this article answers these questions using product and market information from 2024 to 2026.
Industry background: a growing glycol ether market
The global propylene glycol ether market was valued at approximately USD 2.03 billion in 2024 and is projected to reach USD 2.75 billion by 2034. The propylene glycol n-butyl ether segment is expected to grow at a CAGR of about 2% during the 2024-2031 forecast period. In China, the propylene glycol ether market is forecast to reach USD 606.5 million by 2034, supported by industrialization and manufacturing demand.
Demand is also being shaped by regulatory and formulation trends. PNB is widely used in high-performance water-based coatings because of its solvency and coalescing properties, which help formulators meet low-VOC standards. In electronics and precision cleaning, PNB is preferred for residue-free drying and high solvency for greases.
What is propylene glycol butyl ether (PNB)?
Propylene glycol butyl ether is a pure solvent. A commercial product should be identified by its chemical name, CAS number, purity, and packaging. Yunjian (Guangzhou) Import & Export Trade Co., Ltd. supplies pure PNB solvent, CAS 15821-83-7, in 180 kg carbon steel drums (180 L).
In formulations, PNB performs several functions:
- Coalescing: In water-based coatings, PNB helps resin particles form a continuous film.
- Coupling: It helps blend water and organic components in a single-phase system.
- Solvency: It dissolves resins, oils, and greases, which supports cleaning and ink applications.
- Evaporation control: Its slower evaporation helps adjust drying behavior in coatings and inks.
PNB is intended for use in the electronics and semiconductor, cleaning agents and degreasers, and coatings and inks industries. It is also used in other industrial applications.
High purity, refined grades, and stability
Buyers searching for high purity propylene glycol butyl ether, refined propylene glycol butyl ether, or high stability propylene glycol butyl ether are usually looking for consistent batch quality. In practice, these terms are not standardized, so buyers should verify the product specification and the supplier's ability to maintain quality over repeated orders.
In a documented application for a coatings industry OEM client in China, PNB was used in coating formulations over a 20-ton project completed within one year. The project results included stable coating performance and improved quality. The key aspects were high purity, stable supply, and excellent compatibility.
For high purity and stability, a supplier should be able to provide:
- Product specification with CAS number and basic properties
- Purity statements and typical quality data
- Safety data sheet
- Batch-level consistency records if needed
Propylene glycol butyl ether for coatings
PNB is widely used in water-based coatings. Because of its solvency and coalescing properties, it helps formulators produce films with good appearance while reducing VOC content. Coatings formulators typically evaluate PNB for compatibility with the specific resin system in their formula.
When selecting PNB for coatings, buyers often ask about propylene glycol butyl ether for coatings specifications, purity, and packaging. Yunjian supplies PNB in 180 kg drums, which is a standard industrial packaging size for this solvent.
The Chinese coatings OEM case mentioned earlier shows why specification stability matters: the customer used PNB continuously over a 20-ton project and saw stable coating performance. High purity and stable supply were identified as important factors.
Ink grade propylene glycol butyl ether
For printing inks, PNB is used to adjust drying, improve pigment wetting, and control flow. Ink formulators may search for ink grade propylene glycol butyl ether to ensure the solvent is suitable for printing applications.
The chemical identity of ink grade PNB is the same as other pure PNB: CAS 15821-83-7. The difference is not a separate molecular structure but the buyer's quality expectations for color, odor, and residue behavior. Buyers should evaluate the solvent in their actual ink system before ordering large volumes.
Cleaning agent grade propylene glycol butyl ether
PNB is used in industrial cleaning and degreasing because it provides strong solvency for greases and oils. In electronics and precision cleaning, residue-free drying is a decisive advantage. Cleaning agent grade PNB is often incorporated into aqueous or semi-aqueous cleaners for metal parts, electronic assemblies, and precision components.
For buyers looking for propylene glycol butyl ether for industrial cleaning, the key evaluation points are solvency, drying behavior, and compatibility with the parts being cleaned. Because cleaning requirements vary, sample testing is recommended.
How PNB is supplied: packaging and related products
PNB is supplied as a pure solvent in 180 kg carbon steel drums (180 L). This format is standard for industrial solvent handling, storage, and formulation. When a supplier cannot clearly confirm the CAS number or packaging specification, the risk of misprocurement rises.
Yunjian's broader product line includes PNB, DPNB, TPNB, DPM, TPM, and DPMA. The company specializes in organic solvents, additives, inorganic chemical raw materials, acrylic monomers, methacrylic monomers, special chemical monomers, surfactants, laboratory consumables, and precision instruments.
Choosing between PNB and related glycol ethers
If PNB does not match the evaporation or solvency requirement, related glycol ethers may be alternatives. DPNB is designed for high-performance coatings and inks, precision cleaning and degreasing, and specialty chemicals. TPNB is used in ultra-high-performance coatings, semiconductor and precision electronic manufacturing, and special functional materials processing. DPM is applied in coatings and inks, electronics and semiconductor manufacturing, and industrial cleaning and degreasing. TPM is used in high-end industrial coatings, electronics and semiconductor manufacturing, specialty chemicals and functional materials, and precision cleaning.
| Product | CAS | Packaging | Typical applications |
|---|---|---|---|
| PNB | 15821-83-7 | 180 kg (180 L) drum | Coatings and inks; cleaning agents and degreasers; electronics and semiconductor |
| DPNB | 35884-42-5 | 190 kg (190 L) drum | High-performance coatings and inks; precision cleaning and degreasing; specialty chemicals |
| TPNB | 55934-93-5 | 190 kg (190 L) drum | Ultra-high-performance coatings; semiconductor and precision electronic manufacturing; special functional materials |
| DPM | 34590-94-8 | 195 kg (195 L) drum | Coatings and inks; electronics and semiconductor; industrial cleaning and degreasing |
| TPM | 20324-33-8 | 200 kg (200 L) drum | High-end industrial coatings; electronics and semiconductor; specialty chemicals; precision cleaning |
| DPMA | 88917-22-0 | 200 kg (200 L) drum | Coatings and inks; electronic chemicals; adhesives and sealants; personal care and daily chemical products |
This comparison is not a performance ranking. Each solvent has a different evaporation rate, solvency profile, and application fit. The purpose is to help buyers ask the right questions before selecting a glycol ether.
Step-by-step: evaluating PNB before purchase
The following steps are designed for buyers who are moving from awareness to supplier research.
Step 1: Define your application and performance requirement
Identify whether PNB is for coatings, printing inks, industrial cleaning, or another use. This determines the specification and the testing plan.
Step 2: Confirm chemical identity
Request the exact chemical name and CAS number. For PNB, the CAS number is 15821-83-7. If a different CAS number is provided, the product is not PNB.
Step 3: Review purity and specification
Ask for the product specification and, where possible, typical properties. Confirm whether the product is pure PNB solvent rather than a blend.
Step 4: Check packaging and logistics
Standard PNB packaging from Yunjian is 180 kg per carbon steel drum (180 L). For export orders, confirm drum handling, palletization, and shipping method.
Step 5: Request compliance documents
For EU markets, PNB must comply with REACH Regulation (EC) No. 1907/2006. Request a safety data sheet and relevant compliance documentation.
Step 6: Assess supplier capability
Consider the supplier's experience, production support, and service network. Yunjian was established in 2013 and has an affiliated company, Jiangsu Yunjian Chemical Technology Co., Ltd., established in 2018. Its production is supported by a 30,000 m² facility. The company employs about 50 staff, including an R&D team of 20 engineers. Annual production capacity is 60,000 units.
Step 7: Run a sample trial
Test the sample in your actual coating, ink, or cleaning formulation before placing a bulk order. This reduces the risk of compatibility problems.
Global supply landscape and supplier comparison
Key global manufacturers of propylene glycol ether include Dow Inc., LyondellBasell, BASF SE, Eastman Chemical, and Jiangsu Baichuan High-tech. These manufacturers produce large volumes upstream and have strong technical resources.
Specialized chemical trading and export companies serve a different role. Yunjian (Guangzhou) Import & Export Trade Co., Ltd. was established in 2013 and serves major markets in the EU and India. Export business accounts for 20% of total sales. Sales service points are located in Guangzhou, Dongguan, Shaoguan, and Jiangsu. The company serves industries such as coatings, inks, resins, adhesives, pharmaceuticals, advertising, and consumer goods.
For a buyer, the choice between a manufacturer and a trading company depends on volume, technical support needs, and flexibility. A direct producer may offer deep process knowledge. A specialized supplier may offer broader product variety, faster response, and easier export coordination.
Sourcing FAQ for propylene glycol butyl ether
Does propylene glycol butyl ether meet EU REACH compliance requirements?
For PNB sold or used in European markets, compliance with REACH Regulation (EC) No. 1907/2006 is required. Buyers should request a current safety data sheet and the supplier's REACH documentation. Some buyers also ask whether PNB is CE certified or ISO certified. CE marking is generally not applied to bulk chemical solvents; ISO certificates relate to a supplier's quality management system. The correct approach is to request the relevant documents from the supplier and verify them for your market.
What is ink grade propylene glycol butyl ether?
Ink grade PNB is pure propylene glycol butyl ether (CAS 15821-83-7) selected for printing ink formulations. The grade name indicates the intended application, not a different chemical structure. Buyers should confirm purity, packaging, and compatibility with their resin system. Yunjian supplies pure PNB solvent in 180 kg carbon steel drums.
What factors affect propylene glycol butyl ether price?
PNB price depends on purity, packaging, order volume, logistics, and raw-material market conditions. Since prices change over time and vary by destination, buyers should request a quotation for their specific quantity and delivery point. Yunjian can be contacted via email at hx@yunjianchem.com or by phone at +86 18318338888.
Can I request a propylene glycol butyl ether sample?
Yes. Sample testing is a normal part of solvent sourcing, especially for coatings, inks, and cleaning applications. Contact Yunjian at hx@yunjianchem.com or WhatsApp at +86 181-489-99443 to discuss sample requirements.
What lead time should I expect for PNB orders?
Lead time depends on stock availability, order quantity, and destination. Yunjian has production support from a 30,000 m² facility and sales service points in Guangzhou, Dongguan, Shaoguan, and Jiangsu. For a specific lead-time estimate, contact the sales team with your quantity and delivery location.
Conclusion
Propylene glycol butyl ether is a well-established solvent for coatings, inks, and industrial cleaning. Its role in low-VOC water-based systems and precision cleaning makes it relevant to current formulation trends. For early-stage buyers, the essentials are simple: know the CAS number (15821-83-7), confirm purity and packaging, request compliance documents, and test a sample before bulk purchase.
Yunjian (Guangzhou) Import & Export Trade Co., Ltd. supplies pure PNB in 180 kg drums and supports a wider portfolio of glycol ethers. To continue your research, download the company brochure or contact the team for specification and sample inquiries.