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    Related: OP-10 9036-19-5 OP-15
    • Octylphenol Ethoxylate OP-10 (About 10 EO) CAS 9036-19-5
    • Octylphenol Ethoxylate OP-10 (About 10 EO) CAS 9036-19-5
    • Octylphenol Ethoxylate OP-10 (About 10 EO) CAS 9036-19-5

    Octylphenol Ethoxylate OP-10 (About 10 EO) CAS 9036-19-5

    OP-10 octylphenol ethoxylate (CAS 9036-19-5) is a nonionic emulsifier, wetting agent and dispersing aid for industrial formulations. This listing covers a grade with a nominal average of about 10 EO units and a distribution of ethoxylate chain lengths. Manufacturer codes are not universal, so the quotation identifies the EO grade and active-matter basis. COA (Certificate of Analysis), TDS (Technical Data Sheet) and SDS (Safety Data Sheet) can be provided for the quoted product.

    • CAS: 9036-19-5
    • Synonyms: OP-10; OPE-10; Octylphenol ethoxylate (nominal 10 EO grade); Octylphenol polyoxyethylene ether; t-Octylphenol ethoxylate; Octylphenoxypolyethoxyethanol
    • Molecular Formula: General repeat-unit representation C14H22O(C2H4O)n. The nominal average n is about 10 for this listing; commercial material contains an EO-homologue distribution, not one fixed molecular formula.
    • Grade: Industrial nonionic surfactant. EO level, hydroxyl value, water, active-matter basis, pH conditions and physical form are specified for the quoted grade.
    • Package: Drum or bulk packaging; container requirements, liner and net weight are specified in the quotation.
    • ECHA List No.: 618-541-1 (technical database identifier)
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    Product Description

    1 Grade Specifications and Quality Data
    2 Industrial Applications and Grade Comparisons
    3 Storage and Handling
    4 Quotation and Destination Requirements

    Grade Specifications and Quality Data

    Quality item Specification basis
    Hydroxyl value Reported in mg KOH/g with the titration method and reporting basis. This measures hydroxyl-group content; it does not directly identify the individual EO homologues.
    Water and active matter Specified separately with test methods and mass-reporting basis. An uncalibrated chromatographic area percentage is not an active-matter specification.
    pH Reported for an aqueous solution at a stated concentration and temperature; values measured under different conditions should not be treated as equivalent.
    Cloud point and HLB Cloud point is stated in °C with its method, medium and concentration. HLB is a separate dimensionless selection reference with a stated basis, not a cloud-point result or EO count.
    Appearance and physical form Specified at a stated temperature for the quoted grade. Concentration and handling temperature affect pumping, dosing and any permitted warming.

    EO-distribution chromatographic information can be provided for comparing OP-10 grades. A suitable LC/HPLC method can resolve the relevant ethoxylate homologues; quantitative composition requires peak assignments, calibrated detector responses and a stated molar or mass basis. A single GC peak-area percentage does not establish the mass purity of the complete ethoxylate distribution. If limits for named residual compounds are required, the quotation specifies the analytical method, its applicability to the product matrix and quantitation limits separately from the EO profile.

    Industrial Applications and Grade Comparisons

    OP-10 supports oil-in-water emulsification, wetting and dispersion in industrial cleaners, textile processing and coatings. Selection depends on the oil phase, operating temperature, water quality, electrolyte content, foam requirements and emulsion stability. Performance is assessed in the complete formulation.

    About 10 EO describes a nominal average, not a molecule with exactly ten EO units. Compared with OP-15 (nominal 15 EO), OP-10 has a different nominal ethoxylation level. The manufacturer-defined Triton X-100 grade averages about 9.5 EO; X-100-type grades need their own specifications. TX-10 / NPE-10 has a nonylphenol hydrophobic group. Alcohol-derived options such as AEO-9 / MOA-9 and AEO-7 are formulation comparisons, not automatic one-for-one substitutes. Compare EO distribution, active matter, cloud point, wetting, foam and stability before changing grades.

    Storage and Handling

    Keep sealed in a compatible container in a cool, dry, ventilated place, protected from moisture, contamination and excessive heat. Grade-specific storage, shelf-life and permitted warming conditions accompany the TDS and SDS. Use suitable gloves and eye protection, prevent environmental release and follow the supplied SDS and applicable transport and disposal requirements.

    Quotation and Destination Requirements

    Send the intended application or reference grade, approximate quantity and destination for a quotation. Destination- and use-specific requirements for octylphenol ethoxylates are reviewed for the proposed grade and supply chain. EU REACH and UK REACH authorisation requirements are assessed separately; UK REACH applies in Great Britain, while EU REACH applies in Northern Ireland. A CAS or ECHA list number is not an authorisation or compliance certificate.

    FAQ - Technical & Supply Chain

    • Q:

      Does OP-10 mean exactly ten EO units in every molecule?

      A: No. This listing uses OP-10 for a nominal average of about 10 EO with a distribution of chain lengths. Manufacturer codes vary, and CAS 9036-19-5 does not determine one EO level or concentration. The quoted TDS defines the grade.
    • Q:

      Can OP-10 replace OP-15 or Triton X-100 without reformulation testing?

      A: Not automatically. This OP-10 listing is nominal 10 EO; OP-15 is nominal 15 EO, while manufacturer-defined Triton X-100 averages about 9.5 EO. Differences in EO distribution, active matter and cloud point can affect wetting, foam and emulsion stability. Compare the specifications and test the intended formulation before substitution.
    • Q:

      Which documents and quality data are available for an OP-10 quotation?

      A: COA, TDS and SDS can be provided for the quoted grade, together with applicable quality specifications and EO-distribution analytical information. The TDS defines grade properties and test conditions; the batch COA reports applicable release results. Residual-compound limits and methods are specified separately when required by the order.

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