Does OP-10 mean every octylphenol ethoxylate molecule has exactly ten EO units?

No. OP-10 is a commercial octylphenol-ethoxylate distribution centered near ten EO units. The CAS number covers the family, so active matter, hydroxyl value, water, pH, and the stated test method for cloud point or HLB should be compared.

Can OP-10 replace OP-15 or a TX-100-type grade based only on a related product name or CAS family?

Not automatically. Nominal EO level affects hydrophilic balance, cloud point, physical form, and performance in a formulation. Compare the offered specification, including the test conditions, and evaluate wetting, emulsion stability, or detergency in the intended system.

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

Octylphenol Ethoxylate OP-10 (CAS 9036-19-5, EC/List 618-541-1) is a nonionic surfactant distribution centered on about 10 ethylene oxide units. It is used for oil-in-water emulsification, wetting, detergency and dispersion in industrial formulations. OP-10 is a commercial grade, not one pure molecule: buyers should match hydroxyl value, water, pH, appearance, cloud point or HLB and active matter against the current TDS and batch COA. TX-100-type performance may be compared, but brand equivalence must be confirmed by specification and application testing. EU and UK users must also review the authorisation status of 4-tert-octylphenol ethoxylates for the intended use. For a higher nominal EO grade, OP-15 should be compared by cloud point, HLB, physical form and application test results.

CAS: 9036-19-5
Synonyms: OP-10; OPE-10; Octylphenol polyoxyethylene ether (about 10 EO); t-Octylphenol ethoxylate; Octylphenoxypolyethoxyethanol; TX-100-type nonionic surfactant
Einecs: 618-541-1
Molecular Formula: Average structure C14H22O(C2H4O)n, with n about 10; a homolog distribution with no single fixed molecular formula.
Grade: Confirm the nominal EO or PO level, feedstock range, active matter, water, physical form and relevant analytical values against the current TDS and COA.
Package: State required quantity, physical form and destination; confirm the current bag or container, liner, net weight, temperature handling and transport requirements before quotation.

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Product Description

1 Technical Specifications

2 Applications

3 Storage

4 Safety / Regulatory

Technical Specifications

Property	Specification
Identity	Commercial 4-tert-octylphenol ethoxylate distribution, about 10 EO; CAS 9036-19-5; EC/List 618-541-1.
Specification basis	Grade properties and batch COA, not a fixed formula or a single-substance purity percentage.
Key controls	Hydroxyl value, water, pH, appearance, cloud point or HLB, active matter and application performance.
Comparison rule	Compare OP-10, TX-100-type and other OPEO grades by actual TDS, COA and formulation tests; do not infer equivalence from a trade name.

Applications

Oil-in-water emulsification in industrial formulations. Wetting and detergency in industrial cleaners. Dispersion and processing aid in textiles, coatings and polymer systems. Agrochemical or metal-treatment formulations only after compatibility and regulatory review.

Storage

Keep tightly closed in the original compatible container in a cool, dry, ventilated place, protected from moisture, contamination, excessive heat and incompatible materials. Follow the supplier TDS/SDS and the shelf-life conditions stated for the delivered lot; do not assume a fixed two-year shelf life.

Safety / Regulatory

For industrial handling, review the current supplier SDS, use suitable gloves and eye protection, prevent environmental release and follow local transport and disposal rules. 4-tert-Octylphenol ethoxylates are subject to EU and UK REACH authorisation controls for relevant uses; confirm jurisdiction- and use-specific compliance before supply or use. Waste classification depends on the material, contamination and local law and should not be labelled automatically as hazardous waste.

FAQ - Technical & Supply Chain

Q:
Does OP-10 mean every octylphenol ethoxylate molecule has exactly ten EO units?

A: No. OP-10 is a commercial octylphenol-ethoxylate distribution centered near ten EO units. The CAS number covers the family, so active matter, hydroxyl value, water, pH, and the stated test method for cloud point or HLB should be compared.
Q:
Can OP-10 replace OP-15 or a TX-100-type grade based only on a related product name or CAS family?

A: Not automatically. Nominal EO level affects hydrophilic balance, cloud point, physical form, and performance in a formulation. Compare the offered specification, including the test conditions, and evaluate wetting, emulsion stability, or detergency in the intended system.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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