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HS Code |
903617 |
| Name | 1,2-Pentanediol |
| Synonyms | 1,2-Dihydroxypentane |
| Chemical Formula | C5H12O2 |
| Molecular Weight | 104.15 g/mol |
| Cas Number | 5343-92-0 |
| Appearance | Colorless liquid |
| Odor | Mild, characteristic |
| Boiling Point | 208°C |
| Melting Point | -30°C |
| Density | 0.96 g/cm³ (20°C) |
| Solubility In Water | Miscible |
| Flash Point | 104°C (closed cup) |
| Refractive Index | 1.445 (20°C) |
As an accredited 1,2-Pentanediol factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 1,2-Pentanediol is packaged in a 500 mL amber glass bottle with a secure screw cap and clear hazard labeling. |
| Shipping | 1,2-Pentanediol is shipped in tightly sealed, chemical-resistant containers such as drums or bottles to prevent leakage and contamination. It should be protected from heat and direct sunlight, and handled in accordance with applicable regulations. Proper labeling, transport documentation, and, if required, adherence to specific hazard classifications is essential for safe shipping. |
| Storage | 1,2-Pentanediol should be stored in a cool, dry, and well-ventilated area, away from direct sunlight, heat sources, and incompatible materials such as strong oxidizing agents. Keep the container tightly closed when not in use to prevent contamination and moisture absorption. Store in an appropriately labeled chemical container, and ensure compliance with relevant safety and regulatory guidelines. |
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1,2-Pentanediol, as a multifunctional diol, supports several high-value industrial sectors. Our manufacturing process ensures consistent quality for customers focused on regulatory compliance, process efficiency, and stable supply for technical applications.
Major personal care producers incorporate this diol as an antimicrobial stabilizer and moisturizing agent, particularly in leave-on emulsions and water-based systems for sensitive skin. Manufacturers select it for its low irritation, broad compatibility, and low-odor properties compared to alternatives. Integration requires adherence to international cosmetic regulations concerning total preservation load and residual substances. Adjustment of the dosage considers both microbial challenge test results and final formulation viscosity. End uses include luxury facial creams, high-moisture lotions, and baby skincare ranges.
Industry compliance standards Typical usage ratio Downstream process integration Final product types
Specialty coatings manufacturers use this diol as a coalescing agent, freeze-thaw stabilizer, and solvent for waterborne acrylic and polyurethane dispersions. Its use aids film formation at lower temperatures and limits water sensitivity in applied coatings. The addition level is determined by resin compatibility, target gloss, and environmental compliance standards, with careful control to avoid excess viscosity or migration. Typical end items include direct-to-metal paints, flexible wood coatings, and specialty graphic inks.
Industry compliance standards Typical usage ratio Downstream process integration Final product types
Polymer manufacturers select this diol as a chain extender or backbone modifier in the synthesis of polyesters, polyurethanes, and alkyds to enhance flexibility, hydrophilicity, and process stability. Strict raw material specifications support downstream polymerization control and end-use safety profiles. Usage ratio varies with target molecular weight and required mechanical properties. Finished goods derive their functional properties—such as elasticity, hydrolytic stability, or surface softness—directly from accurate formulation and controlled reaction conditions.
Industry compliance standards Typical usage ratio Downstream process integration Final product types
Pharmaceutical companies formulate dermal gels and creams with 1,2-pentanediol to improve drug solubility, retain skin moisture, and enhance transdermal delivery with low skin irritation. Manufacturing adheres to GMP and pharmacopoeia monographs for content, residual solvents, and microbiological purity. Dosage is set by solubilization needs, skin compatibility data, and drug loading capacity. Processing integrates the diol in the solubilization stage, ensuring active pharmaceutical ingredients (APIs) dissolve uniformly in finished dosage forms.
Industry compliance standards Typical usage ratio
Downstream process integration
Final product types
5. Ingredient in Food-Contact Packaging AdhesivesAdhesive compounders use this diol in waterborne and hot-melt adhesive formulations for flexible packaging. Its presence improves open time, adhesive flow, and film integrity under varying humidity. Production conforms with established food-contact safety regulations, verified through migration and extractables testing. Usage rates respond to bond strength targets, end-user application temperature, and compatibility with other polyols or resins. The final adhesive must maintain food-contact safety after thermal or mechanical conversion. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
6. Antimicrobial Agent in Wet-Wipe and Nonwoven ProductionProducers of personal care and industrial nonwovens incorporate this diol to provide broad-spectrum preservation in wet-laid and spunlace wipe products, especially where formaldehyde donors and parabens are excluded. Its antimicrobial effectiveness depends on moisture level, wipe substrate, and synergy with phenoxyethanol or organic acids. Regulatory review focuses on biocidal claims and residual thresholds as defined by region. Production lines must optimize addition timing and mixing consistency to avoid microbial hotspots in high-throughput output. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
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Competitive 1,2-Pentanediol prices that fit your budget—flexible terms and customized quotes for every order.
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Tel: +8615365186327
Email: admin@ascent-chem.com
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We have been producing 1,2-pentanediol long enough to see shifts in market demands, formulation techniques, and end-user expectations. This glycol, also referred to as pentane-1,2-diol, continues to draw attention across industries. Over time, our experience refining its purification, controlling residuals, and maintaining batch consistency has underscored its value as an ingredient with both functional and regulatory benefits. We monitor impurity profiles, chromatographic purity, and water content throughout every lot.
Our 1,2-pentanediol, available in an industrial-grade model we have developed through incremental process improvement, is defined by consistent high assay and narrow impurity specifications. We use established, reproducible methods, formulated from years of plant-level troubleshooting and customer feedback. Every output must meet in-house standards for color, odor, stability, toxicity, and microbial control performance. Those criteria are not optional for us, since end uses—from cosmetics to coatings to specialty lubricants—count on predictable performance at volume.
Not all 1,2-pentanediol on the market looks or behaves the same. Some methods leave a higher content of byproducts or result in a yellow-tinted, odor-prone or variable product. We've paid close attention to these process idiosyncrasies by investing in purification, so our material remains water-clear and nearly odorless. That stability and predictability speak volumes in formulation lines, where color shifts or unwanted scents can trigger costly reruns of finished goods.
Handling and storage habits influence the stability too. Our years in bulk chemical handling taught us that temperature swings and improper tank maintenance can jeopardize every batch in the supply chain. We use stainless steel and food-grade contact equipment, then test for peroxide and acid numbers before product release. That controls off-spec materials not only at origin but throughout transport, which our distribution partners and clients value especially when moisture or contamination could compromise finished products.
Formulators in personal care, paints and coatings, lubricants, and chemical synthesis come to us asking how our 1,2-pentanediol can reinforce their existing product lines, or replace less stable alternatives. In cosmetics, its strong antimicrobial properties play a critical role as a multifunctional agent—preserving formulas and enhancing skin feel. Years ago, preservatives based on parabens and methylisothiazolinone led the way, but increasing regulatory pressure and consumer scrutiny sent the industry searching for milder options. We ramped up our purification and microbiological control efforts in response.
For a skin cream, a clear, high-purity glycol allows formulators to avoid harsh preservatives while maintaining safety standards. This property doesn't just appeal on paper—we’ve routinely seen quality tests come back cleaner and more reproducible compared to many lower grade glycols or traditional alcohols. 1,2-pentanediol gets integrated both for its performance and as a marketing claim for modern “preservative-free” formulations.
Surface coatings producers, on the other hand, sought solvency and durability. Unlike propylene glycol or 1,3-butylene glycol, 1,2-pentanediol increases compatibility with hydrophobic resins and alters drying time. In our application support lab, clients have achieved brighter pigment wetting and improved resistance to humidity pickup when using our material versus alternatives. This matters on plant floors where even tiny shifts in drying or stability can halt a paint or ink production run.
In the field of lubricants, 1,2-pentanediol acts as a synthetic base stock or as part of additive systems. Where mineral oils or more volatile base fluids would fail at high temperature, this diol brings low volatility, strong polarity, and good thermal stability. This results in longer fluid life and fewer deposit issues. Maintenance managers and formulation chemists on our end-user visits often ask about those direct performance impacts, and they've seen those effects directly in field tests with compressors, hydraulic equipment, and gear oils.
Synthetic routes for specialty chemicals also take advantage of the reactive primary and secondary hydroxyl groups. 1,2-pentanediol is a competent building block for various polyesters, polyurethanes, and surfactants. We work directly with custom syntheses—both as a process co-solvent and as a reactant—with researchers who appreciate the selective reactivity and controlled side product profiles achieved with high-purity diol.
We’ve seen production facilities struggle with variability from batch to batch. Minor inconsistencies ripple through downstream processes. Cloudiness, off-smell, or compromised preservation can result from just a percent or two difference in assay or a spike in residual aldehydes. Based on our own experience, we keep original analytical records that allow traceability for every drum we supply. This makes all the difference once customers need root-cause analysis for process failures, and it’s often the hidden hand behind stable product quality.
Compared to alternative glycols like propylene glycol, 1,2-pentanediol demonstrates different polarity, melting point, solubility profile, and antimicrobial activity. 1,3-butylene glycol and 1,2-hexanediol also compete in many applications, but they don't always provide the same sensory profile or compatibility in sensitive formulas. Some personal care chemists even describe slight sticky or tacky afterfeel or more solvent harshness when using those alternatives, so they switch to pentanediol after running focus group stability and sensory evaluations.
We've worked directly with major consumer goods companies navigating new preservation requirements following regulatory changes and negative publicity for former standards. Each formulation tweak required us to control the finest variation—keeping water below 0.1%, residual volatiles below 100 ppm, and optical clarity consistent across entire tankers. That level of day-to-day production discipline reflects the fact that one slip not only ruins a batch but can irreparably harm trusted customer partnerships.
Over the last decade, many of our clients have had to address newer requirements from organizations like the European Chemicals Agency, FDA, and Japan’s PMDA. Increasing regulatory burdens—especially on materials that might migrate into food, be used near mucous membranes, or form part of “clean-beauty” products—drive every raw material supplier to rethink control and risk management.
For us, it's not just about meeting purity specifications. We provide a full supporting package for our pentanediol: repeated batch certifications, long-term storage testing, transparency about each process change or starting material switch. If feedstock shifts or new impurity limits come into play, we keep documentation ready for every shipment. Several years ago, we transitioned to a closed system to prevent cross-contamination with other glycols, and we record tank cleans, valve swaps, and every bulk transfer event.
Understanding global transportation rules and customs checks shaped how we prepare export lots and verify their contents. Customers shipping our product into Europe and North America expect not only Certificates of Analysis but also full traceability, statements on animal testing, vegan conformity, GMO and allergen status, and proof of non-use of restricted chemicals. We meet these needs with direct batch tracking and by staying ahead on anticipated new guidelines. That reduces friction for our clients at borders and in regulatory audits.
We recognize the increasing importance customers place on the environmental impacts of their raw materials. 1,2-pentanediol used to be produced exclusively from petrochemical sources, but we now integrate bio-based feedstocks. Life cycle analysis had to change how we source and process ethanol or butanol so fossil-derived content doesn’t crowd out alternatives on our lines. We've worked up pilot runs using renewable alcohols, then checked final product performance and cost. That’s real evidence, and it shapes our product planning.
Waste minimization during manufacturing forms another focus. We have invested in closed-loop water recirculation, solvent recycling, and catalytic oxidation methods to reduce off-gas and wastewater burdens. These updates didn't come about by talking with consultants—they were a response to years of real discharge permit pressures and rising disposal costs. Traceability for spent catalysts and capture of exhaust streams becomes table stakes, especially for customers with published environmental goals.
Customers who want to used our 1,2-pentanediol as a “greener” ingredient often ask about carbon footprint, supply chain resilience, and documentation for ISO or EcoVadis audits. We’ve responded with actual data, not marketing copy, detailing where and how the intermediates were sourced. That said, the biggest impact remains solid manufacturing practice, because a sustainable chemical that doesn’t perform or isn’t pure enough only causes business loss and unnecessary waste down the road.
Within the glycol family, different members fit distinct chemistries. Propylene glycol, for example, is used in massive quantities for food, pharma, and anti-freeze, with global approvals and a long record of safety, but the antimicrobial value is limited. 1,3-butylene glycol appeals for its solvent properties and humectancy, but it doesn’t match our pentanediol’s preservation enhancement in cosmetics.
1,2-pentanediol sits at a molecular weight and volatility profile between the short-chain and long-chain glycols. That character influences not just how it’s handled but how it’s integrated for preservation, solvency, viscosity addition, and water resistance. Based on our client feedback, switching from shorter glycols can dramatically improve odor and color stability as well as texture, especially for leave-on skin care and serums.
We’ve also worked with analytical chemists conducting stability studies of active ingredients. They find that some actives degrade faster in the presence of lower chain glycols or higher water content. The higher boiling point and lower reactivity of our pentanediol extends the shelf life of challenging molecules—this answers to field demands, not just theoretical calculation.
Many of our clients work under tight audit controls or with branded product launches. Failures from cross-contamination, off-spec batches, or changes to impurity levels lead to stress and project cost overruns. We maintain clear communication about changes in feedstock, process corrections, or lot deviations so there are no surprises at their filling line.
In one case, a large personal care producer ran into preservation failure with a generic grade of pentanediol. They switched to our specification, and reported back improved microbial log reduction in accelerated challenge tests, with no change to the product’s skin feel or fragrance system. On our side, we validated their test results and identified small process tweaks to further enhance their preservation margin.
Raw material costs always factor into purchasing, but unpredictable output, shutdowns, or failed launches cost far more. We’ve seen what happens when end users swap in a low-cost grade that delivers less performance: claims spike, returns increase, and reputation suffers. Our focus remains on building trust by sharing in-house technical expertise and explaining real-world consequences of every process or formulation adjustment.
We keep adapting our 1,2-pentanediol to meet future needs. As regulations limit previous standards in preservation and as consumer preferences change, our plant upgrades lead directly to better-controlled, more versatile chemical building blocks. Product quality for us is not just a certificate—it’s an outcome we create by direct oversight, hands-on process control, and regular communication with clients both new and long-standing.
Each bottle, drum, or tanker we ship reflects commitment from years on the plant floor. In chemical manufacturing, shortcuts show up as problems down the road. It’s only through transparent, rigorous attention to the process and to evolving customer demands that we have earned ongoing trust in this industry.
Our path forward includes continued investment in purity, sustainable sourcing, traceability, and responsiveness to next-generation formulations, whether in high-value skin care, advanced coatings, or synthetic chemistry. We draw on both practical experience and up-to-date technical evidence to back every shipment of 1,2-pentanediol, supporting our clients’ innovation journeys with reliable, proven raw materials.
