Polyethylene glycol (PEG) is a synthetic, water-soluble polymer made by the polymerization of ethylene oxide. It is a clear, viscous liquid or white, waxy solid, depending on its molecular weight.
PEG has a wide range of applications due to its unique properties. One of its primary uses is as a non-toxic, water-soluble base for cosmetics, medication, and food products. PEG is also used as a lubricant, plasticizer, and solvent in various applications and industries.
PEG is also used in the production of surfactants, detergents, lubricants, and inks. It is used as an adhesive and binding agent in the construction and woodworking industry. Additionally, PEG is utilized in the production of polyurethane resins and in the synthesis of polycarbonate diols for the manufacturing of thermoplastic polyurethane elastomers.
| Type | Appearance
(25ºC) | Colour
(Pt-Co) | Hydroxyl value
(mgKOH/g) | Molecular
Weight | pH |
| Polyethylene glycol PEG 200 | Colorless liquid | ≤40 | 510~623 | 180~220 | 5.0~7.0 |
| Polyethylene glycol PEG 300 | Colorless liquid | ≤40 | 340~416 | 270~330 | 5.0~7.0 |
| Polyethylene glycol PEG 400 | Colorless liquid | ≤40 | 255~311 | 360~440 | 5.0~7.0 |
| Polyethylene glycol PEG 500 | Colorless liquid | ≤40 | 205~280 | 480~530 | 5.0~7.0 |
| Polyethylene glycol PEG 600 | Colorless liquid | ≤40 | 170~208 | 540~660 | 5.0~7.0 |
| Polyethylene glycol PEG 800 | White paste | ≤40 | 127~156 | 720~880 | 5.0~7.0 |
| Polyethylene glycol PEG 1000 | White paste | ≤40 | 102~125 | 900~1100 | 5.0~7.0 |
| Polyethylene glycol PEG 1500 | White flake | ≤40 | 68~84 | 1350~1650 | 5.0~7.0 |
| Polyethylene glycol PEG 2000 | White flake | ≤50 | 51~63 | 1800~2200 | 5.0~7.0 |
| Polyethylene glycol PEG 2000 | White flake | ≤50 | 34~42 | 2700~3300 | 5.0~7.0 |
| Polyethylene glycol PEG 3350 | White flake | ≤50 | 32~40 | 3200~3450 | 5.0~7.0 |
| Polyethylene glycol PEG 4000 | White flake | ≤50 | 26~32 | 3600~4400 | 5.0~7.0 |
| Polyethylene glycol PEG 6000 | White flake | ≤50 | 16~21 | 5400~7000 | 5.0~7.0 |
| Polyethylene glycol PEG 8000 | White flake | ≤50 | 12~16 | 7200~8800 | 5.0~7.0 |
| Polyethylene glycol PEG10000 | White flake | ≤50 | 8-11 | 8600-10500 | 5.0~7.0 |
| Polyethylene glycol PEG20000 | White power | ≤50 | 5.1-6.2 | 18500-22000 | 5.0~7.0 |
| Test Method | -- | GB/T 3143 | GB/T 7383 | Calculated | GB/T 6368 |
Application
1. Polyethylene glycol series products can be used in pharmaceuticals. Polyethylene glycol with lower relative molecular weight can be used as a solvent, cosolvent, o/w type emulsifier, and stabilizer, for making cement suspensions, flocculants, emulsions, injections, etc. It is also used as a water-soluble ointment matrix and suppository matrix. Solid waxy polyethylene glycol with higher relative molecular weight is often used to increase the viscosity and solidity of low molecular weight liquid PEG, as well as to compensate for other drugs; For drugs that are not easily soluble in water, this product can be used as a carrier for solid dispersants to achieve solid dispersion. PEG4000 and PEG6000 are good coating materials, hydrophilic polishing materials, film and capsule materials, plasticizers, lubricants, and drop pill matrices, used for preparing tablets, pills, capsules, microcapsules, etc.
2. Polyethylene glycol series products can be used as raw materials for ester type surfactants.
3. PEG-200 can be used as a medium for organic synthesis and a heat carrier with high requirements. It is used as a moisturizer, inorganic salt solubilizer, and viscosity regulator in the daily chemical industry; Used as a softener and antistatic agent in the textile industry; Used as a wetting agent in the papermaking and pesticide industries.
4. PEG-400, PEG-600, and PEG-800 are used as substrates for pharmaceuticals and cosmetics, as lubricants and wetting agents in the rubber and textile industries. The addition of PEG-600 to electrolytes in the metal industry can enhance the grinding effect and enhance the luster of the metal surface.
5. PEG-1000 and PEG-1500 are used as substrates, lubricants, and softeners in the pharmaceutical, textile, and cosmetics industries; Used as a dispersant in the paint industry to improve the water dispersibility and flexibility of resins, with a dosage of 10-30%; Ink can improve the solubility of dyes and reduce their volatility, especially suitable for wax paper and printing ink, and can also be used to adjust ink viscosity in ballpoint pen ink; Used as a dispersant in the rubber industry to promote vulcanization and as a dispersant for carbon black fillers.
6. PEG-2000 and PEG-3000 are used as metal processing casting agents, lubricants and cutting fluids for metal wire drawing, stamping or forming, grinding, cooling, lubricating, polishing agents, welding agents, etc; In the paper industry, it is used as a lubricant and also as a hot melt adhesive to increase rapid rewetting ability.
7. PEG-4000 and PEG-6000 are used as substrates in the pharmaceutical and cosmetic industries to regulate viscosity and melting point; Used as a finishing agent in the papermaking industry to increase the gloss and smoothness of paper; As an additive in the rubber industry, it increases the lubricity and plasticity of rubber products, reduces power consumption during processing, and extends the service life of rubber products; Used as a lubricant and coolant in the metal processing industry, and as a dispersant and emulsifier in the production of pesticides and pigments; Used as an antistatic agent, lubricant, etc. in the textile industry.
8. PEG8000 is used as a substrate in the pharmaceutical and cosmetic industries, playing a role in regulating viscosity and melting point; Used as a lubricant and coolant in the rubber and metal processing industries, and as a dispersant and emulsifier in the production of pesticides and pigments; Used in the textile industry as an antistatic agent, lubricant, etc.