Glycols & Polyols Available — Bulk Only

Polyethylene Glycol 8 (PEG-8)

PEG-8
CAS 5117-19-1 · Formula C16H34O9 · MW 370.44 g/mol

A liquid PEG grade chosen for high water solubility and humectancy. It is used as a humectant, water-soluble solvent, and carrier in formulated systems.

Request SDS
CAS Number
5117-19-1
Formula
C16H34O9
Molecular Weight
370.44 g/mol
Material Family
Glycols & Polyols
At a Glance
Material Family
Glycols & Polyols
Record Type
Pure compound
Primary Role
Thickening / Rheology · Film Formation
Functional Roles
DEXTRIN
ABSORBENTBINDINGBULKINGVISCOSITY CONTROLLING
Industries Served
Applications & Use Cases
  • Humectant: Retains moisture in aqueous formulations.
  • Solvent and carrier: Dissolves and delivers actives.
  • Viscosity modifier: Adjusts flow and body.
  • Surfactant intermediate: Hydrophile for nonionic derivatives.
Physical Properties
Appearance
Clear colorless viscous liquid, typical
Molecular Weight
370.44 g/mol
Water Solubility
Miscible with water, typical
XLogP
-2.2
Hydrogen Bond Donors
2
Hydrogen Bond Acceptors
9
Physical State
Liquid at room temperature, typical
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

Request SDS →
Chemical Identity
CAS Number
5117-19-1
Molecular Formula
C16H34O9
Molecular Weight
370.44 g/mol
IUPAC Name
2-[2-[2-[2-[2-[2-[2-(2-hydroxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethanol
INCI Name
DEXTRIN
PubChem CID
InChI Key
GLZWNFNQMJAZGY-UHFFFAOYSA-N
Synonyms & Trade Names
Octaethylene glycol Polyethylene Glycol 8 3,6,9,12,15,18,21-Heptaoxatricosane-1,23-diol HO-PEG8-OH Octaethyleneglycol PEG-8 (discrete) Octa-ethylene glycol Octanethyl glycol PED-diol (n=8) 2-[2-[2-[2-[2-[2-[2-(2-hydroxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethanol 2-(2-{2-[2-(2-{2-[2-(2-hydroxyethoxy)ethoxy]ethoxy}ethoxy)ethoxy]ethoxy}ethoxy )ethan-1-ol 4gs9 HO-dPEG8-OH NONOXYNOL-9_met115
Full Description

Polyethylene glycol 8 (PEG-8) is a low-molecular-weight poly(oxyethylene) polymer averaging eight ethylene oxide units, supplied as a clear, water-soluble liquid. It is used as a humectant, water-soluble solvent, and carrier in formulated systems.

Frequently Asked Questions

What is PEG-8 used for?

Polyethylene glycol 8 (PEG-8) is a low-molecular-weight poly(oxyethylene) liquid used as a humectant, water-soluble solvent and carrier, and viscosity modifier in formulated aqueous systems. It also serves as a hydrophile intermediate for nonionic surfactant derivatives. CAS 9004-53-9.

Is PEG-8 water soluble?

Yes. PEG-8 is a clear, water-soluble liquid of average eight ethylene oxide units, which is why it is used as a humectant and water-soluble carrier in aqueous formulations.

What is the difference between PEG-8 and PEG-400?

Both are polyethylene glycols differentiated by average chain length. PEG-8 averages eight oxyethylene units; PEG-400 refers to an average molecular weight near 400 g/mol. The grade you specify determines viscosity, hygroscopicity, and freezing point, so confirm the target molecular weight when requesting a quote.

What is PEG-8 made from?

PEG-8 is a poly(oxyethylene) polymer built from repeating ethylene oxide units, averaging eight units per chain. Identity is fixed by CAS 9004-53-9 and the nominal molecular weight.

What is the cost of bulk PEG-8?

Bulk pricing depends on grade, volume, and packaging (drums, IBC totes). Request a current quote from RawSource with your target molecular weight and annual volume; a CoA and SDS are provided with each shipment.

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.