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

Product overview

OEP-70 is a commercial phosphate-ester penetrant for alkaline wetting applications. Its ethoxylated 2-ethylhexyl phosphate chemistry differs from the non-phosphated 2-Ethylhexanol Ethoxylate. Phosphate-ester products can contain monoesters, diesters and residual ethoxylated alcohol. The selected grade specification identifies active matter, acid or neutralized form and, for a salt grade, the counterion. These composition details affect grade selection and cannot be inferred from the OEP-70 name alone.

Technical information

Wetting and formulation selection

OEP-70 is used in textile pretreatment auxiliaries and alkaline cleaning formulations where the required penetration depends on the bath conditions. Sodium Di(2-ethylhexyl) Sulfosuccinate (DOSS/AOT) is another anionic wetting agent for comparison. Its sulfosuccinate ester chemistry differs from a phosphate ester: strongly acidic or alkaline conditions can promote DOSS hydrolysis, with elevated temperature accelerating the reaction. A DOSS wetting grade is therefore a separate formulation choice, with its own active matter, carrier and stability requirements.

For nonionic cleaning and wetting options, Isotridecyl Alcohol Ethoxylate and AEO-9 / MOA-9 Alcohol Ethoxylate are related formulation candidates. Their alcohol chain and ethoxylation grade, cloud point and behavior in the intended electrolyte-containing bath are part of the comparison. Shared wetting or cleaning uses do not establish equal performance in a hot, concentrated alkali bath; selection is made for the intended formulation and operating conditions.

Quality data and test methods

The grade specification states active matter as a mass percentage with its test method and result basis, alongside the neutralization state and water content. Acid value, where applicable, is reported in mg KOH/g with the titration endpoint; values based on different endpoints are not directly comparable. A pH result includes the aqueous-solution concentration and measurement temperature. Karl Fischer water determination is a suitable method option when adapted to the sample matrix; residual alkaline salts can interfere and require appropriate method handling.

Wetting and penetration data are meaningful with the test substrate, surfactant concentration, alkali concentration, temperature and contact time stated. For textile applications, a cloth-immersion or penetration-time result relates to the specified fabric and bath. High-caustic mercerizing conditions require an agreed caustic-bath test rather than a result from neutral or mildly alkaline wetting conditions. The selected grade is compared at the process conditions, including compatibility and wetting performance in the complete formulation.

Documents and quotation

We can provide COA (Certificate of Analysis), TDS (Technical Data Sheet) and SDS (Safety Data Sheet), together with applicable quality and wetting-test information for the selected grade. For a quotation, send the intended application and quantity; the alkali concentration, temperature or an existing product specification is useful for grade selection. Packaging and net weight are stated in the quotation. Storage, handling and any conditioning instructions follow the supplied grade’s SDS and TDS. The photos show sample and packaging formats for reference.