PEG-5 Undecyl Ether (Undeceth-5)

At a Glance

Material Family

Surfactants - Nonionic

Record Type

Pure compound

Primary Role

Cleaning / Degreasing · Surfactancy

Functional Roles

INCI Name

UNDECETH-5

CosIng Functions

SURFACTANT - CLEANSINGSURFACTANT - EMULSIFYING

Industries Served

Beauty & Personal Care HI&I Cleaning Industrial Manufacturing

Applications & Use Cases

▸ Surfactant: surface-active and wetting agent in cleaning systems
▸ Emulsification: oil-in-water emulsifier for oil-containing formulations
▸ Detergency: detergent component in cleaning blends

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 →

HS / Tariff Classification

Harmonized System (HS) Code — 6-digit international heading

3402 . 42

Chapter 34

Soap, organic surface-active agents, washing and lubricating preparations, waxes

Heading 34.02

Internationally harmonized (WCO HS)

Subheading 3402.42

6-digit international code — national tariff line adds further digits

Chemical Identity

CAS Number

34398-01-1

Molecular Formula

C13H28O2

Molecular Weight

216.36 g/mol

IUPAC Name

2-undecoxyethanol

INCI Name

UNDECETH-5

PubChem CID

61930

InChI Key

KLMGMPDXSPSCOC-UHFFFAOYSA-N

Synonyms & Trade Names

2-undecyloxy-1-ethanol 2-(UNDECYLOXY)ETHANOL 2-undecoxyethanol Ethanol, 2-(undecyloxy)- 2-(Undecyloxy)ethan-1-ol 2-(Undecyloxy)-ethanol Undeceth-1 Undecyl ethyleneglycol monoether Monochamol; 2-undecyloxyethan-1-ol 2-(undecyloxy)ethanol, AldrichCPR

Full Description

PEG-5 undecyl ether (undeceth-5, CAS 34398-01-1) is a nonionic surfactant formed by ethoxylating undecyl alcohol with about 5 moles of ethylene oxide. It functions as a surfactant, emulsifier and wetting agent.

Regulatory & registration requirements

TSCA (US):
REACH (EU): Not determined from public registry
EC number: 931-426-3

TSCA Inventory flag XU: a substance exempt from reporting under the Chemical Data Reporting Rule (40 CFR 711) (EPA flag legend).

TSCA Inventory flag PMN: a commenced PMN (premanufacture notice) substance (EPA flag legend).

Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12

Frequently Asked Questions

What is PEG-5 undecyl ether?

PEG-5 undecyl ether (undeceth-5, CAS 34398-01-1) is a nonionic surfactant formed by ethoxylating undecyl alcohol with about 5 moles of ethylene oxide. It functions as a surfactant, emulsifier and wetting agent.

What is PEG-5 undecyl ether used for?

It is used as a surface-active and wetting agent in cleaning systems, as an oil-in-water emulsifier for oil-containing formulations, and as a detergent component in cleaning blends.

What is the chemical formula and structure of PEG-5 undecyl ether?

It is an alcohol ethoxylate built from an undecyl (C11) alcohol with about 5 ethylene-oxide units; the ctx formula is listed as C13H28O2 for the base ether unit. CAS 34398-01-1, also known as undeceth-5.

What is the difference between PEG-5 undecyl ether and other alcohol ethoxylates?

It is distinguished by its C11 (undecyl) hydrophobe and the relatively low degree of ethoxylation (about 5 EO), which sets its HLB and wetting/detergency profile versus longer-chain or more highly ethoxylated alcohol ethoxylates. Refer to the technical data sheet for the supplied grade.

How is bulk PEG-5 undecyl ether supplied and priced?

RawSource supplies PEG-5 undecyl ether (CAS 34398-01-1, HS 3402.42) in bulk industrial packaging such as drums and totes, with CoA and SDS per lot. Request a quote with your target volume and ship-to location for current landed pricing.

What is the REACH and TSCA regulatory status of PEG-5 Undecyl Ether (Undeceth-5)?

PEG-5 Undecyl Ether (Undeceth-5) (CAS 34398-01-1) is listed as Active on the U.S. EPA TSCA Inventory; its REACH registration status is not determined from the public ECHA registry.

Related Products

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.