Nonylphenol Ethoxylate

1. Product Overview

Nonylphenol Ethoxylate (NPE) is a major class of nonionic surfactants produced by the addition polymerization of nonylphenol with ethylene oxide. The general chemical formula is C₉H₁₉-C₆H₄-O-(CH₂CH₂O)n-H (where n represents the molar number of ethylene oxide adducts). CAS numbers vary depending on the degree of ethoxylation, with common examples including 9016-45-9 (polymer), 127087-87-0, 68412-54-4, among others.

Depending on the degree of ethoxylation, NPEs range from colorless transparent liquids (low ethoxylation) to white or pale yellow waxy solids (high ethoxylation). Their defining characteristic is the optimal balance between the lipophilic group (nonylphenol) and the hydrophilic group (polyoxyethylene chain). By adjusting the ethylene oxide molar number (n value), a series of products from oil-soluble to water-soluble can be obtained to meet diverse industrial application requirements.

As a quintessential nonionic surfactant, NPE exhibits excellent wetting, penetration, emulsification, dispersion, and detergency properties. It demonstrates resistance to acids, alkalis, and hard water, and can be effectively combined with various surfactants. Historically, it has been widely applied across numerous industrial sectors including textiles, printing and dyeing, petroleum, pesticides, leather, papermaking, and construction materials.

2. Key Features

• Adjustable HLB Value: By controlling the ethylene oxide adduct number (n typically ranging from 4-40), HLB (Hydrophilic-Lipophilic Balance) values from 8 to 18 can be achieved, precisely matching requirements from W/O (water-in-oil) to O/W (oil-in-water) emulsifiers.

• Excellent Chemical Stability: Resistant to strong acids, strong alkalis, and high electrolyte concentrations. Maintains surface activity even under harsh chemical conditions, making it suitable for specialized formulations such as acidic cleaners and alkaline degreasers.

• Superior Compatibility: Blends well with anionic, cationic, and other nonionic surfactants for synergistic effects, widely used in complex formulation systems.

• Multifunctionality: Combines wetting, penetration, emulsification, dispersion, solubilization, and detergency functions—one product addressing multiple process requirements.

• Comprehensive Product Range: Available in multiple specifications including TX series (TX-4, TX-7, TX-10, TX-15) and NP series (NP-8, NP-9, NP-10) covering diverse industrial applications.

• Cost-Effective: Compared to specialty surfactants, NPE offers superior cost-performance ratio, maintaining excellent functionality while controlling formulation costs.

3. Technical Specifications with Explanations

4. Applications

Textile & Dyeing Industry

• Scouring Agents & Detergents: Removes natural impurities (oils, waxes) and soils from fabrics; provides excellent wetting and penetration properties

• Leveling Agents & Dispersants: Promotes uniform dye distribution during dyeing, preventing uneven coloration and improving color fastness

• Softening Agents: Certain grades used for fabric softening and hand feel improvement

Industrial Cleaning & Household Detergents

• Hard Surface Cleaners: Formulated into cleaners for metal, glass, ceramic, and floor surfaces; removes oil and dust

• Acid/Alkaline Cleaners: Excellent acid/alkali resistance makes them suitable for industrial descaling and dairy equipment cleaning

• Vehicle Cleaners: Car wash solutions, degreasers

• Dry Cleaning Aids: Additives enhancing detergency in dry cleaning formulations

Pesticide & Fertilizer Industry

• Emulsifiers: Emulsifies pesticide active ingredients (e.g., emulsifiable concentrates) in water, forming stable emulsions for uniform efficacy

• Wetting Agents & Penetrants: Reduces surface tension of spray solutions, enhancing spread and penetration on plant leaves, improving pesticide utilization

Petroleum & Metallurgical Industry

• Oilfield Chemicals: Crude oil demulsifiers, drilling fluid emulsifiers, oil recovery aids

• Metalworking Fluids: Emulsifiers and lubricants in cutting fluids and rolling oils, providing cooling and lubrication

Polymer Materials & Coatings

• Emulsion Polymerization Emulsifiers: Primary or auxiliary emulsifiers in acrylic, vinyl acetate, and other emulsion polymerization systems, stabilizing the polymerization process

• Coating Additives: Wetting dispersants, stabilizers, and color developers in water-based coatings; improving pigment dispersion and storage stability

Other Industrial Applications

• Paper Industry: Resin dispersants, deinking agents

• Leather Industry: Emulsifiers for leather degreasing and fatliquoring processes

• Construction Materials: Components in concrete admixtures for improved workability

5. Product Grade Comparison

NPE grades vary based on ethylene oxide adduct number (n value), creating a series of products with distinct properties:

6. Purchasing & Selection Guide

Select by HLB Value and Cloud Point

1. Emulsification Applications:

• W/O (water-in-oil) emulsions: Choose low HLB grades (e.g., NP-4)

• O/W (oil-in-water) emulsions: Choose HLB 8-16 grades (e.g., NP-7 through NP-15)

• Optimal emulsification occurs when HLB matches the required HLB value of the oil phase

• Typically select grades with HLB 12-15 and appropriate cloud point (e.g., NP-9, NP-10)

• These provide optimal wetting, penetration, and detergency from ambient to moderate temperatures

• Select grades with cloud point exceeding process temperature (e.g., NP-15, NP-40)

• Prevents surfactant precipitation and performance loss at elevated temperatures

Select by Application Area

• Textile Processing: NP-7, NP-9, NP-10 for scouring, dyeing, washing

• Pesticide Emulsification: NP-4, NP-7, NP-10 combinations based on pesticide properties

• Industrial Cleaning: NP-8, NP-9, NP-10 preferred for acid cleaning, alkali cleaning, metal cleaners

• Emulsion Polymerization: High HLB grades NP-10, NP-15, or NP-40 as emulsifiers

Environmental & Regulatory Compliance

⚠️ Important Regulatory Notice:

• Nonylphenol ethoxylates (NPEs) and their degradation product nonylphenol (NP) are recognized as environmental endocrine disruptors

• The EU has strictly restricted NPE use in detergents, textiles, and consumer products (REACH SVHC list)

• Verify compliance with local regulations for your target market (EU REACH, US EPA, China's "Priority Control New Pollutants List 2023")

Quality Considerations

• Ensure active matter content ≥99% for high purity

• Low impurity levels minimize side reactions and impact on finished product performance

7. Frequently Asked Questions (FAQ)

Q: What is the relationship between Nonylphenol Ethoxylate (NPE) and Nonylphenol (NP)?

A: NPE is the ethoxylation product of NP with ethylene oxide. In the environment, NPE biodegrades by losing its polyoxyethylene chain, regenerating NP. NP is considered more environmentally hazardous than NPE, exhibiting estrogenic effects and bioaccumulation potential, making it a priority controlled substance internationally.

Q: Why is Nonylphenol Ethoxylate facing increasing environmental restrictions?

A: Primarily because its degradation product, nonylphenol (NP), is confirmed as an environmental endocrine disruptor with toxic effects on aquatic organisms. NP is persistent in the environment and bioaccumulative. Consequently, the EU, US, China, and other regions have implemented regulations restricting or prohibiting NPE in certain consumer products (household detergents, textiles).

Q: Are TX-10 and NP-10 the same product?

A: Generally yes, they refer to the same product. Both indicate nonylphenol ethoxylate with approximately 10 moles ethylene oxide. TX and NP series are different naming conventions used by various manufacturers or in different regions. The TX series name originates from early commercial brands like "Triton X-100" and is widely used in Chinese markets. Technically and functionally, they are essentially identical.

Q: How do I select the appropriate NPE grade based on cloud point?

A: Cloud point is the temperature at which nonionic surfactants become insoluble and turn cloudy in aqueous solution. Always ensure your application temperature is below the cloud point to maintain complete solubility and optimal surface activity. For example, if your cleaning process operates at 40°C, select a grade with cloud point above 50°C (e.g., NP-10).

Q: What are safe alternatives to Nonylphenol Ethoxylate?

A: In applications facing regulatory restrictions, common environmentally friendly alternatives include:

• Fatty alcohol ethoxylates

• Isomeric alcohol ethoxylates

• Alkyl polyglycosides (APGs)

These nonionic surfactants offer comparable surface activity with superior biodegradability and non-toxic degradation products.

8. Delivery, Certification & Service

Delivery Capabilities

• Inventory Status: Common grades (NP-7, NP-9, NP-10, TX-10) available from regional warehouses for rapid dispatch

• Sample Program: 500g-1kg samples available for research institutions and manufacturers for formulation testing and performance evaluation

• Packaging Options:

• Small quantities: 1 kg, 5 kg fluorinated bottles or aluminum foil bags

• Industrial quantities: 200 kg steel drums, 1000 kg IBC totes

• Custom packaging: Available for volume customers

• Shipping: Non-hazardous material; standard freight shipping available (express, LTL, full truckload)

Quality Certifications

• ISO 9001:2015 certified manufacturing facilities

• Certificate of Analysis (COA) provided with each batch, documenting appearance, active matter content, cloud point, pH, color, water content, and other critical parameters

• Safety Data Sheet (SDS) available in multiple languages

• Third-party test reports (e.g., SGS) available upon request

• Additional documentation: Non-GMO declaration, allergen statement available

• Regulatory compliance documents: REACH, RoHS compliance statements available upon request

Technical Support & Services

• Technical Consultation: Application specialist team available for online consultation on product selection, formulation optimization, process adaptation, and regulatory compliance

• Custom Services: Tailored ethoxylation degrees and quality specifications for long-term partnership customers

• Regulatory Support: Documentation packages for product registration in target markets, including updated information on EU REACH (SVHC list) and China's new pollutant control requirements

Documentation Available

• Certificate of Analysis (COA)

• Safety Data Sheet (SDS/MSDS)

• Technical Data Sheet (TDS)

• Specification and compliance statements

• Non-GMO declaration

• Allergen statement

• REACH compliance documentation