Products

Propylene Glycol

    • Product Name: Propylene Glycol
    • Alias: PG
    • Einecs: 200-338-0
    • Mininmum Order: 1 g
    • Factroy Site: Yudu County, Ganzhou, Jiangxi, China
    • Price Inquiry: admin@ascent-chem.com
    • Manufacturer: Ascent Petrochem Holdings Co., Limited
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    Specifications
    HS Code 501205
    Cas Number 57-55-6
    Molecular Formula C3H8O2
    Molecular Weight 76.09 g/mol
    Appearance Colorless, odorless, viscous liquid
    Boiling Point 188.2°C
    Melting Point -59°C
    Density 1.036 g/cm³ at 20°C
    Solubility In Water Miscible
    Flash Point 99°C (closed cup)
    Refractive Index 1.4328 at 20°C
    Vapor Pressure 0.07 mmHg at 20°C
    Autoignition Temperature 371°C

    As an accredited Propylene Glycol factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing A 20-liter blue HDPE drum labeled “Propylene Glycol, 99.5%,” features hazard symbols and safety instructions, securely sealed for transport.
    Shipping Propylene Glycol should be shipped in tightly sealed, clearly labeled containers, such as drums or intermediate bulk containers (IBCs). Transport in a cool, well-ventilated area, away from strong oxidizers. It is non-flammable and non-hazardous for general transport but should be handled according to standard chemical safety procedures to prevent spills or leaks.
    Storage Propylene Glycol should be stored in tightly closed containers, away from heat, sparks, and open flames. Store in a cool, dry, well-ventilated area. Avoid direct sunlight and strong oxidizers. Use containers made of stainless steel, aluminum, or high-density polyethylene. Ensure proper labeling, and prevent contamination or moisture ingress. Follow all safety regulations and use secondary containment to prevent spills.
    Application of Propylene Glycol
    Purity 99.5%: Propylene Glycol with purity 99.5% is used in pharmaceutical formulations, where it ensures high solubility and safety for drug delivery. USP Grade: Propylene Glycol USP Grade is used in injectable medications, where it provides reliable carrier properties and biocompatibility. Low Viscosity: Propylene Glycol low viscosity is used in antifreeze applications, where it allows efficient heat transfer and pumpability at low temperatures. Molecular Weight 76.09 g/mol: Propylene Glycol with molecular weight 76.09 g/mol is used in food additives, where it facilitates uniform distribution of flavors and preservatives. Melting Point -59°C: Propylene Glycol with -59°C melting point is used in de-icing fluids, where it delivers effective low-temperature performance and quick ice dissolution. Stability Temperature up to 150°C: Propylene Glycol stability temperature up to 150°C is used in heat transfer fluids, where it maintains thermal stability for industrial HVAC systems. Pharmaceutical Grade: Propylene Glycol pharmaceutical grade is used in topical creams, where it enhances skin absorption and preserves formulation integrity. Water Solubility: Propylene Glycol with high water solubility is used in cosmetic emulsions, where it improves miscibility of active ingredients and prevents phase separation. Food Grade: Propylene Glycol food grade is used in bakery products, where it maintains moisture retention and prolongs shelf-life. Refractive Index 1.432-1.434: Propylene Glycol with refractive index 1.432-1.434 is used in optical lens cleaning solutions, where it ensures clear residue-free cleaning performance.
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    Certification & Compliance
    More Introduction

    Propylene Glycol: Reliable Quality Direct From Our Manufacturing Team

    What We Make and Why It Matters

    Propylene glycol has become one of the most widely used glycols in modern manufacturing. We have focused years of research and process refinement to ensure that every drum and tank delivered from our facility meets strict purity, water content, and performance expectations. Our factory’s technical backbone rests on strong experience with hydrolysis and distillation. By controlling raw materials and monitoring each step, we keep contaminants low and ensure complete traceability for every lot.

    We understand raw material quality doesn’t just affect finished products—it shapes how efficiently our clients operate and the consistency they can promise downstream. Slight impurities in propylene glycol can cause haze in resins, unwanted flavor in food use, or reactivity that builds up over time in closed-loop heat exchangers. From day one, we have built our business on producing a sharply-defined, clear, odorless liquid, emphasizing purity and stability over cutting corners.

    Propylene Glycol Grades and Models We Produce

    Our typical product line includes USP (United States Pharmacopeia), Industrial (Tech), and Cosmetic grades. Each model runs under its own set of stringent process controls and analytical checks:

    Our standard models run between 99.5% to 99.9% minimum purity as measured by gas chromatography. Custom titration and packing options are available for dedicated clients with hygienic requirements.

    Where Propylene Glycol Delivers Value in the Real World

    We have shipped propylene glycol for more than 20 years, seeing firsthand how important the right glycol becomes in food, beverage, pharmaceutical, and heavy industry. Bakeries appreciate consistency in dough and icing textures. Candy makers avoid crystallization. HVAC installers keep chillers and pipes free of sludge and scale, while formulating for proper freezing points. In livestock farming, reliable glycol brings safety to nutritional mixes and adjuvants.

    We work with companies building high-speed printing inks, cutting fluids, brake fluids, paints, and aircraft deicing solutions. Our glycol helps them bind water, control viscosity, and maintain reliable freeze and boil-over points. We get periodic requests from novel application developers—3D printing, specialty lubricants, and advanced oilfield chemicals—often wanting custom batch sizes or modified grades requiring tweaks in distillation or ion-exchange handling.

    One critical feedback from customers in hot-fill beverage and condiment plants is the need for glycol that won’t add off-flavors or discolor with extended storage. We've invested heavily in closed handling and nitrogen-blanketed tanks to prevent oxidation and UV exposure from changing composition during storage or transit.

    The Differences Between Our Propylene Glycol and Other Products

    Propylene glycol does not behave like ethylene glycol, which is another widely used glycol with a reputation for stronger toxicity in food and pharma applications. As manufacturers, we’ve watched global industries shift away from ethylene glycol in consumables, especially since propylene glycol offers far less metabolic risk upon accidental ingestion. Public and regulatory pressure has driven strict limits on alternative glycols and plasticizers, especially for products sold in supermarkets and pharmacies. Glycol ethers and blends sometimes contain traces of aldehydes and peroxides, so our focus has remained on refining processes that rule out these compounds entirely.

    We field questions about differences with glycerin. Glycerin feels stickier, has higher viscosity, and cannot offer the same depression of freezing point needed in HVAC and antifreeze uses. Many flavor and fragrance developers tried both; in direct comparison, propylene glycol delivers cleaner, more reliable performance across changing temperatures and longer shelf life.

    The manufacturing process for propylene glycol, based on propylene oxide, gives us fine-tuned control over impurities. Continuous monitoring helps us avoid by-products like propionaldehyde or higher polyols, which cause haze or shifts in solubility when mixed with water or alcohol. Distillation columns in our plant allow quick response if any parameter veers off target, minimizing scrap and ensuring customer trust.

    Key Benefits Direct From a Manufacturing Perspective

    As a plant-based team, we see that end-users value not only the purity of our product but also our control over logistical details. Every tank comes with a full certificate of analysis, mapped back to the exact shift and batch. Our workers receive training on cross-contamination and allergen control, especially if USP or food-grade glycol comes after an industrial campaign. Having engineers and quality staff in the facility—rather than across the world—means we solve problems before they leave the production floor.

    Expanding tank storage and new piping systems have let us handle smaller and larger volume orders without risk of residue carryover. We run pilot lots for clients wanting non-standard blends or specific trace element requirements. Our lab technicians have handed more than a few odd requests: ultra-low chloride or potassium for electronics, dye-tracing glycol for hydronic system audits, and batches specified for kosher or halal compliance.

    Reliability in the market can swing on details often missed by traders or resellers. We have had cases where a new customer’s previous supplier left glycol sitting in unclean, sunlight-exposed containers or swapped to cheaper feedstocks during market shortages. Adding UV-stabilizers, running stricter batch homogeneity tests, or simply refusing to load from unclean tanks means we can guarantee performance across a supply chain built on traceability.

    Supporting End-Use Innovation and Application Safety

    We watch regulations tighten almost every year, especially in North America, the EU, and many parts of Asia. Our research team stays focused on both global trends and local customer needs. For example, recent updates in food safety rules pushed us to refine our chemical removal systems, dropping acetals and ethers to trace levels. In liquid pharmaceutical and e-cigarette uses, suppliers face scrutiny over flavor purity and the risk of adverse inhalation effects. We respond by testing for additional contaminants, dialing up our analytical power with each annual review.

    We often see startups and established companies bring novel uses for propylene glycol to our lab—whether as a carrier in botanical extracts or as a thermal buffer in solar energy projects. These projects sometimes expose requirements new to us, such as biocompatibility for medical devices or unusually low electrical conductivity for battery applications. Direct engagement allows our plant to tweak runs, change pre-filtration routines, or batch small test lots for pilot program partners.

    Disaster response and cold-weather logistics have also brought attention to our glycol. In extreme cold, glycol keeps diesel fuel flowing and prevents rupture of pumps and valves. Emergency HVAC repairs, medical transport refrigeration, and field food prep have all benefited from stockpiled, high-purity glycol. During unpredictable market shortages, we pull from on-site inventory and have driven overnight trucks to keep essential services running—a level of commitment not possible through intermediaries.

    Addressing Safety, Compliance, and Sustainability—A Manufacturer’s View

    We believe every plant run and delivery should prioritize worker safety, end-product integrity, and environmental responsibility. Direct handling gives us a clear window into how propylene glycol is loaded, sealed, and transported. Automated valves, closed-loop systems, and zero-waste filtration reduce chemical exposure on the shop floor. Workers wear PPE and audit storage tanks for even minor leaks. Reusable drums and returnable IBCs limit single-use plastics—small steps, but each matters when operating at thousands of tons per year.

    With end-users increasingly focused on sustainability, our manufacturing team has made changes upstream and downstream. We prioritize bio-based propylene feedstocks as local suppliers develop capacity, and install heat exchangers in our own plant to reclaim process energy for glycol purification steps. By publishing test results and emissions profiles, we keep communication open with customers and regulators alike.

    Downstream, our glycol rarely becomes hazardous waste, but we offer advice and protocols for recapture and reuse in larger facilities. Thermal fluids in closed systems can last years; spent glycol in some food and pharma uses may qualify for compost if clean. Toxicity profiles hover at levels regulators find very manageable—certainly gentler compared to glycols with higher acute toxicity or vapor pressure. Our technical team works with clients to keep disposal costs low and recovery rates high.

    Resilience and Adaptation In A Changing Market

    Being a direct producer gives us unusual insight when global shortages, freight disruptions, or regulatory shifts affect multiple links in the supply chain. During raw material volatility, we work overtime to reformulate plant runs or develop alternative production routes. Experienced staff means every product tank, blend, and test run adapts directly to shifts in feedstock grade, price, or local compliance. No third-party broker can tell this story—it has to come from inside the mill.

    We have learned from both large and boutique clients that reliability trumps rock-bottom price, especially in active pharmaceutical ingredients, food, and personal care. Each order bounced, each delayed truck, weighs on factory managers and chemists. We keep a full pipeline of buffer stock and maintain redundant utilities. Should a power surge hit or a truck route close, our staff pivots production to keep critical supply agreements rolling. This approach has built trust among our major long-term partners and earned us repeat business from firms burned by over-promised logistics or vague quality certificates.

    We see propylene glycol not as a commodity but as an ingredient tied to innovation, reliability, and safety. With market tastes shifting, new tech exploding, and regulation always tightening, our entire team approaches each tank and drum with an eye for detail. Only direct hands-on manufacturing delivers the traceability and adaptability that professional clients now expect.

    The Human Side: Our Manufacturing Team And Community Engagement

    Inside our facility, the work gets done by dozens of technicians, operators, engineers, and quality staff. Running glycol stills, purifiers, pumps, and bulk loading tanks takes more than automation. Experience and a sense of responsibility drive our people. Veterans pass on troubleshooting tricks—how to spot subtle off-odors, how to sequence cleaning runs to prevent trace contamination, and how to tune temperature controls for minimum water carryover or rapid grade changeover.

    We view quality not as a certificate or marketing claim but as real confidence—one that extends from laboratory checks to client-site audits. Customers visit, walk through storage and purifying zones, and meet the technical staff. This kind of transparency only happens at a manufacturing site, not a warehouse or broker’s office. Clients frequently describe relief after trying our propylene glycol in continuous production or high-sensitivity blends and finding smooth performance without the risk of unknowns.

    Our factory sits in a community familiar with the chemical industry’s footprint, and we commit openly to safe management of air, water, and by-products. Local schools ask for tours, regional safety officials audit lines, and neighborhood leaders get honest reports on emissions. This sense of rootedness isn’t captured on product labels; it comes from years of steady employment, responsive troubleshooting, and the daily effort of dozens of factory staff sharing strong know-how.

    Why Direct Manufactured Propylene Glycol Earns Long-Term Trust

    There are no shortcuts to quality or reliability. Every tank of propylene glycol leaving our plant carries the results of methodical processing, disciplined cleanliness, and continuous testing. The differences between high-quality glycol and off-specification alternatives can be measured in more than a handful of lab numbers. Failures in purity, stability, or shipment handling have real, costly consequences for food safety, brand reputation, and equipment performance.

    Over many years, we have learned the value of establishing tight feedback loops with users, responding not only to complaints or specifications but to ambitions and creativity. Sometimes the biggest step forward comes from helping a new partner solve an unfamiliar challenge—whether it is running glycol through new bioreactors, producing ultra-stable pharmaceutical gels, or expanding into sustainable energy storage. No distributor or reseller speaks with the same authority on plant-side problem-solving, technician-driven improvements, or the commitment to meet ever-tougher regulations.

    Propylene glycol stands at the intersection of experience-based manufacturing, exacting quality control, and long-standing market trust. Customers find real value not only in what is inside the drum but also in how our facility runs and the professional standards we uphold. From industrial giants to local startups, our model remains the same: make glycol with pride, deliver it clean and safe, and back every order with the authority of direct production.

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