Polyethylene glycol 400


Polyglycol, Polyethylene oxide, Polyoxy ethylene, PEG 400, PEG, Poly(ethylene glycol)
Linear Formula:
CAS Number:
MDL number:
EC Index Number:

storage conditions

Store at +15°C to +25°C.

Quality Level


Ph. Eur.

vapor pressure

<0.1 hPa ( 20 °C)

product line


autoignition temp.

360 °C (DIN 51794)


28000 mg/kg LD50, oral (Rat)
>20000 mg/kg LD50, skin (Rabbit)


5-7 (20 °C, 100 g/L in H2O)

kinematic viscosity

97-110 cSt(20 °C)


5 °C

transition temp

flash point >200 °C


1.13 g/cm3 at 20 °C

storage temp.


SMILES string




InChI key


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General description

When working on a pharmaceutical formulation, there are specific considerations to make and challenging hurdles to take before you can successfully launch your final drug product - formulation stability, release kinetics and bioavailability limitations just to name a few. With our application know-how and regulatory expertise, we support you in every step of development, scale-up, and production.
As part of our Emprove® Program, our raw materials are offered with extensive documentation facilitating compliance of your pharma and biopharma product, full supply chain transparency and risk mitigation. Our SAFC® portfolio of high-quality products for biopharmaceutical and pharmaceutical formulation and production withstands strict quality control procedures and is produced according to applicable cGMP guidelines.


Polyethylene glycol (PEG) is a multipurpose polymer which can be applied in solid, semi-solid and liquid formulations. Its broad functional spectrum includes e.g. improvement of API solubility, acting as a lubricant for tablet coating, function as a carrier, and many more. Our comprehensive portfolio of PEGs comprises diverse polymer sizes of different molecular weights to meet your specific application and needs.

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