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Polyethylene Glycol 1500 (commonly designated as PEG 1500, CAS No. 25322-68-3) represents a staple of modern chemical engineering and organic synthesis. Formed through the controlled addition-polymerization of ethylene oxide (EO) to ethylene glycol or water, PEG 1500 exhibits a mean molecular weight of approximately 1350 to 1650 g/mol. This specific molecular mass range bestows a unique set of physical parameters, positioning the substance precisely between liquid low-molecular-weight PEGs and hard, wax-like high-molecular-weight PEGs.
At room temperature, PEG 1500 is characterized as a smooth, waxy white solid or soft flake. Its high solubility in water and organic solvents, paired with low toxicity, negligible vapor pressure, and exceptional humectant capabilities, makes it an indispensable agent across multiple high-precision sectors. From pharmaceuticals to personal care, and from polymer polymerization to metalworking lubricants, PEG 1500 functions as a binder, lubricant, plasticizer, and carrier. As a leading manufacturer and supplier in China, we deliver high-purity PEG 1500 engineered to meet strict international standards, ensuring stability, compliance, and optimized performance.
The balance of hydrophobic polymer backbones and hydrophilic hydroxyl end-groups allows PEG 1500 to serve as a surfactant and co-solvent. Its structural stability ensures it does not easily undergo hydrolysis or oxidation under standard storage configurations, offering a prolonged shelf-life.
Because of its waxy paste consistency, PEG 1500 acts as a structural modifier. Formulators use it to bridge the gap between liquid phase media and solid structural matrices, adjusting melting profiles and mechanical performance in final formulations.
Our industrial facility uses state-of-the-art ring-opening polymerization of ethylene oxide under alkaline catalyst systems (such as potassium hydroxide, KOH, or sodium methoxide) to synthesize high-purity PEG 1500. The process is constantly monitored with in-line chromatography to guarantee a narrow polydispersity index (PDI). High-precision vacuum stripping steps are implemented to reduce traces of unreacted ethylene oxide (EO) and 1,4-dioxane to levels well below the limits outlined in global pharmaceutical pharmacopeias (such as USP, EP, and ChP).
| Parameters | Standard Specification (Pharma/Cosmetic Grade) | Testing Methodology |
|---|---|---|
| Appearance (25°C) | White waxy solid, flake, or paste | Visual Inspection |
| Average Molecular Weight | 1350 – 1650 g/mol | Hydroxyl Value Method |
| Hydroxyl Value | 68 – 83 mg KOH/g | Titrimetric Determination |
| Solidification Point | 44.0°C – 48.0°C | Rotational Solidification Test |
| pH (5% Aqueous Solution, 25°C) | 5.0 – 7.0 | Potentiometric pH Meter |
| Water Content | ≤ 0.5% max | Karl Fischer Titration |
| Ethylene Oxide residue | ≤ 1 ppm | Gas Chromatography (Headspace GC) |
| 1,4-Dioxane residue | ≤ 5 ppm | Gas Chromatography (Headspace GC) |
| Ethylene Glycol & Diethylene Glycol | ≤ 0.25% | GC-FID Analysis |
Our control over polymerization kinetics prevents high-molecular-weight tails, keeping viscosity stable across thermal processing ranges. This makes our PEG 1500 highly reliable for automated manufacturing lines.
The physical properties of Polyethylene Glycol 1500 enable its use across a range of local and global industrial processes:
Acts as a water-soluble base for ointments, suppositories, and tablet binders. In suppositories, its melting point (44-48°C) ensures stability in warm climates while dissolving smoothly in biological fluids.
Functions as a humectant, binder, and viscosity adjuster in toothpastes, creams, and lotions. It aids moisture retention without leaving a greasy residue.
Serves as a mold release agent, lubricant, and dispersing activator for carbon black in rubber compounding, helping prevent polymer sticking.
Used as a softening agent, antistatic lubricant, and dye dispersant, improving material flexibility, preventing static charge, and supporting consistent color distribution.
Acts as a water-soluble lubricant and coolant in grinding, drawing, and stamping operations. It leaves no carbonized deposits during subsequent heat treatment processes.
The global chemical industry is transitioning toward green chemistry, reduced carbon footprints, and circular manufacturing. As a progressive manufacturer, Yanxatech is aligning its developmental roadmap with these principles:
Gradually transitioning raw material streams from petroleum-derived ethylene oxide to bio-ethanol derived intermediates, reducing the carbon footprint of our PEG series while maintaining chemical performance.
Implementing automated loop reactors with real-time NIR (Near-Infrared) monitoring to achieve a polydispersity index (PDI) below 1.05, optimizing consistency for critical pharmaceutical and electronic applications.
Targeting zero-wastewater discharge through integrated recycling systems and powered by solar and wind micro-grids installed at our primary industrial chemical parks.
Operating out of China's chemical production hubs provides Yanxatech with structural advantages that support global distribution:
Our manufacturing plants are linked by pipeline to primary ethylene and ethylene oxide production facilities, helping secure raw materials and shield customers from market volatility.
Located near major deepwater ports (Tianjin, Qingdao, and Shanghai), we offer flexible container shipping, bulk parcel booking, and intercontinental rail transport options to Europe and Central Asia.
Multiple production lines allow for regular maintenance without disrupting supply schedules, ensuring consistent lead times for large-scale operations.
Yanxatech System Industries Limited (YANXA) is an established supplier of specialty materials in China. Starting as a small business unit in 2008, YANXA has expanded into international markets, providing products and services for the chemical and mechanical industries.
Through cooperation with manufacturers and research institutes in China, YANXA supplies liquid rubbers, nitrites, metal powders, and specialty polyethers. Quality, safety, and efficiency remain the focus of our operations.
We focus on safety and environmental standards across all chemical operations, working to meet standard specifications as well as custom requirements for newly developed applications.
Our factories maintain ISO9001:2008 certifications, providing quality-monitored processing from raw materials through to final delivery.
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Answers to technical and commercial inquiries regarding our Polyethylene Glycol 1500 and procurement processes.
Further industrial solutions supplied by Yanxatech for chemical and mechanical applications.
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