Is OEP-70 an octylphenol ethoxylate or a nonionic penetrant?

No. OEP-70 with CAS 68439-39-4 is an ethoxylated 2-ethylhexyl phosphate-ester surfactant. It is an anionic phosphate-ester grade and should not be identified as an octylphenol ethoxylate or a nonionic penetrant. The commercial material also represents an ester and ethoxylate distribution rather than one discrete molecule.

Does the “70” in OEP-70 prove a fixed active-matter content or composition?

No. The grade name alone does not replace a current specification. Confirm active matter, acid value, pH, water, neutralization state, appearance and the stated test methods for the offered material. These controls are especially relevant because phosphate-ester commercial compositions can vary in monoester, diester and ethoxylate distribution.

How should alkali resistance and penetration be compared for OEP-70?

Compare the proposed grade under the intended concentration, temperature, substrate and alkali conditions. A penetration result is only meaningful with its stated method and formulation context. Confirm the test basis and then assess the candidate in the actual process system; a generic “alkali-resistant” description does not establish equivalent performance.

OEP-70 Alkali-Resistant Penetrant CAS 68439-39-4

OEP-70 Alkali-Resistant Penetrant (CAS 68439-39-4, EC/List No. 614-479-4) is a commercial ethoxylated 2-ethylhexyl phosphate-ester surfactant used for wetting and penetration in alkaline process formulations. The CAS identity covers a variable monoester, diester and ethoxylate distribution rather than one fixed molecule. OEP-70 is an anionic phosphate-ester grade and should not be confused with octylphenol ethoxylates or nonionic penetrants. The “70” designation does not by itself verify active matter. Confirm active matter, acid value, pH, water, neutralization state, appearance, physical form and packaging in the offered TDS, COA and SDS.

CAS: 68439-39-4
Synonyms: 2-Ethylhexanol ethoxylate phosphate; Ethoxylated 2-ethylhexyl phosphate ester; Poly(oxy-1,2-ethanediyl), alpha-(2-ethylhexyl)-omega-hydroxy-, phosphate; OEP-70
Einecs: 614-479-4
Molecular Formula: Variable ethoxylated 2-ethylhexyl phosphate-ester composition; no single molecular formula
Grade: Confirm active matter, acid value, pH, water, neutralization state, appearance and physical form
Package: Confirm current packaging, net weight, conditioning guidance and destination requirements

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Product Description

1 Product overview

2 Technical information

3 Handling and documentation

Product overview

OEP-70 (CAS 68439-39-4, EC/List 614-479-4) is an alkali-resistant anionic surfactant based on ethoxylated 2-ethylhexyl phosphate esters. It is not octylphenol ethoxylate, alkylphenol ethoxylate or a nonionic surfactant. The CAS name identifies a variable poly(oxyethylene) phosphate-ester composition that can contain monoesters, diesters and an ethoxylate distribution, so it has no single molecular formula or conventional single-compound purity. OEP-70 is evaluated for wetting and penetration in strongly alkaline textile scouring, mercerizing, bleaching, dyeing and printing, and may also be evaluated in alkaline metal-cleaning formulations. The grade code “70” does not establish active matter. Confirm active matter, acid value, pH, water, neutralization state, appearance, alkali resistance and penetration test conditions on the current TDS and COA. Confirm current packaging and net weight in the quotation, and follow the SDS for the actual offered grade.

Technical information

Product	OEP-70 Alkali-Resistant Penetrant / 2-Ethylhexanol Ethoxylate Phosphate CAS 68439-39-4
CAS number	68439-39-4
EC / list number	614-479-4
Molecular formula / identity	Variable ethoxylated phosphate-ester composition; no single molecular formula
Synonyms	2-Ethylhexanol ethoxylate phosphate; Ethoxylated 2-ethylhexyl phosphate ester; Poly(oxy-1,2-ethanediyl), alpha-(2-ethylhexyl)-omega-hydroxy-, phosphate; OEP-70
Grade	OEP-70 specification-defined grade; confirm active matter, acid value, pH, water, neutralization state, appearance and test methods on the current TDS/COA
Packaging	Confirm current container, net weight, material compatibility and destination requirements in the quotation

Handling and documentation

Specifications may vary by grade and batch. Confirm the current TDS, COA and SDS before purchase or use. Store and handle the product in accordance with the SDS and applicable site procedures.

FAQ - Technical & Supply Chain

Q:
Is OEP-70 an octylphenol ethoxylate or a nonionic penetrant?

A: No. OEP-70 with CAS 68439-39-4 is an ethoxylated 2-ethylhexyl phosphate-ester surfactant. It is an anionic phosphate-ester grade and should not be identified as an octylphenol ethoxylate or a nonionic penetrant. The commercial material also represents an ester and ethoxylate distribution rather than one discrete molecule.
Q:
Does the “70” in OEP-70 prove a fixed active-matter content or composition?

A: No. The grade name alone does not replace a current specification. Confirm active matter, acid value, pH, water, neutralization state, appearance and the stated test methods for the offered material. These controls are especially relevant because phosphate-ester commercial compositions can vary in monoester, diester and ethoxylate distribution.
Q:
How should alkali resistance and penetration be compared for OEP-70?

A: Compare the proposed grade under the intended concentration, temperature, substrate and alkali conditions. A penetration result is only meaningful with its stated method and formulation context. Confirm the test basis and then assess the candidate in the actual process system; a generic “alkali-resistant” description does not establish equivalent performance.

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