Polyethylene glycol (PEG) is a polyether compound with many applications from industrial manufacturing to medicine. PEG is also known as polyethylene oxide (PEO) or polyoxyethylene (POE), depending on its molecular weight. The structure of PEG is commonly expressed as H−(O−CH2−CH2)n−OH.
Appearance 20-30 ℃
white flake
hydroxyl value
25-31 mgKOH/g
kinematic viscosity mm/s (1%aq. solution 40℃)
8.0-11
color APHA (50 %aq. solution)
≤60
moisture %
≤0.7
ph (3 %aq. solution)
5-7
Medical uses
PEG is the basis of a number of laxatives (e.g., macrogol-containing products, such as Movicol and polyethylene glycol 3350, or SoftLax, MiraLAX, ClearLAX, Osmolax, or GlycoLax). Whole bowel irrigation with polyethylene glycol and added electrolytes is used for bowel preparation before surgery or colonoscopy.
Chemical uses
Polyethylene glycol has a low toxicity and is used in a variety of products.[19] The polymer is used as a lubricating coating for various surfaces in aqueous and non-aqueous environments.
Since PEG is a flexible, water-soluble polymer, it can be used to create very high osmotic pressures (on the order of tens of atmospheres). It also is unlikely to have specific interactions with biological chemicals. These properties make PEG one of the most useful molecules for applying osmotic pressure in biochemistry and biomembranes experiments, in particular when using the osmotic stress technique.
Polyethylene glycol is also commonly used as a polar stationary phase for gas chromatography, as well as a heat transfer fluid in electronic testers.
PEG has also been used to preserve objects that have been salvaged from underwater. In addition, PEG is used when working with green wood as a stabilizer, and to prevent shrinkage.
PEG is often used (as an internal calibration compound) in mass spectrometry experiments, with its characteristic fragmentation pattern allowing accurate and reproducible tuning.
PEG derivatives, such as narrow range ethoxylates, are used as surfactants.
PEG has been used as the hydrophilic block of amphiphilic block copolymers used to create some polymersomes.
Biological uses
PEG is commonly used as a precipitant for plasmid DNA isolation and protein crystallization. X-ray diffraction of protein crystals can reveal the atomic structure of the proteins.
Polymer segments derived from PEG polyols impart flexibility to polyurethanes for applications such as elastomeric fibers (spandex) and foam cushions.
In microbiology, PEG precipitation is used to concentrate viruses. PEG is also used to induce complete fusion (mixing of both inner and outer leaflets) in liposomes reconstituted in vitro.
Gene therapy vectors (such as viruses) can be PEG-coated to shield them from inactivation by the immune system and to de-target them from organs where they may build up and have a toxic effect.The size of the PEG polymer has been shown to be important, with larger polymers achieving the best immune protection.
When working with phenol in a laboratory situation, PEG 300 can be used on phenol skin burns to deactivate any residual phenol.
Commercial uses
PEG is the basis of many skin creams (as cetomacrogol) and personal lubricants (frequently combined with glycerin).
PEG is used in a number of toothpastes as a dispersant. In this application, it binds water and helps keep xanthan gum uniformly distributed throughout the toothpaste.
PEG is also under investigation for use in body armor, and in tattoos to monitor diabetes.
In low-molecular-weight formulations (i.e. PEG 400), it is used in Hewlett-Packard designjet printers as an ink solvent and lubricant for the print heads.
PEG is also one of the main ingredients in paintball fills, because of its thickness and flexibility. However, as early as 2006, some Paintball manufacturers began substituting cheaper oil-based alternatives for PEG.[citation needed]
PEG is also used as an anti-foaming agent in food
Industrial uses
Nitrate ester-plasticized polyethylene glycol is used in Trident II ballistic missile solid rocket fuel.
Dimethyl ethers of PEG are the key ingredient of Selexol, a solvent used by coal-burning, integrated gasification combined cycle (IGCC) power plants to remove carbon dioxide and hydrogen sulfide from the gas waste stream.
PEG has been used as the gate insulator in an electric double-layer transistor to induce superconductivity in an insulator.
PEG is also used as a polymer host for solid polymer electrolytes. Although not yet in commercial production, many groups around the globe are engaged in research on solid polymer electrolytes involving PEG, with the aim of improving their properties, and in permitting their use in batteries, electro-chromic display systems, and other products in the future.
PEG is injected into industrial processes to reduce foaming in separation equipment.
PEG is used as a binder in the preparation of technical ceramics.
Packaging & Shipping
1.Woven bag with plastic film packaging, 25kg/bag
2.Large or special package are also available for customer demands.
3.Store in a dry place with a normal temperature (below 40 ℃), no stacking or great pressure to avoid caking products.
4.This product can be kept for 12 months in the original package, and it shall be put in use within 60 days in case of opening the original package.
5.This product shall be transported according to the standard of common chemical products.
Company Information
Liaoning Kelong Fine Chemical Co., Ltd was founded in 1988. Over 20 years’ hard work, we have grown a specialized fine chemical manufacturer and well-known company in china. As one of high-tech enterprise Kelong Chem focus on science and technology innovation. Our aim is respecting people and serving people with technology. We have engaged many experts to research core technology and gain many patents. We are specialized in surfactant’s research, manufacture and distribution. Nowadays, our dominant products are polycarboxylate superplasticizer, cutting fluids, paint additives and concrete admixture which are widely used in many area, such as daily chemicals, pharmacy, textile printing, ect. At the same time our sales network covers all over world. The company has imported four advanced ethoxylation production lines from Germany, which annual manufacturing capacity was more than 80,000 tons.
