Quick Search
What is NP 4?
NP 4 is an oil-soluble surfactant with excellent emulsification properties at low HLB (HLB: 8.9)
NP 4 is a Nonyl Phenol Ethoxylate (NPE) Surfactant.
*The usage of NP 4 should always be discussed with local authorities.
Synonyms: Nonylphenol ethoxylate (NPE); NPE; APEO; Alkyl Phenol Ethoxylate; 4-Nonylphenol branched, ethoxylated; Nonylphenol branched, ethoxylated; Nonyl phenol polyglycol ether; Nonyl Phenol Ethoxylate; Nonylphenol Ethoxylate; 4 Nonyl Phenol Ethoxylate; Nonylphenol ethoxylate; Nonylphenol, ethoxylated; Nonylphenolethoxylat; Nonylphenolethoxylate; Nonylphenylpolyethylenglykol; Nonylphénylpolyéthylèneglycol; Tergitol NP 4, Arkopal N 40; NP-4; NP4;
CAS number: 9016-45-9
NP 4 is a nonionic surfactant that decreases the surface or interfacial tension between two liquids.
NP 4 is used in Private households and in many different industries.
NP 4 is a non-ionic surface active agent for use in paints and coatings, paper and textile processing, cleaners and detergents, agrochemicals, and metalworking fluids, with excellent detergency, outstanding wetting, versatile solubility characteristics, and exceptional handling properties.
NP 4 is used in large quantities as detergents and cleaning agents but also as emulsifiers, wetting agents, foaming agents, antistatic additives, or dispersants.
NP 4 Surface Active Agent can be used in oilfield drilling and production formulations as a dispersant for petroleum oil, in-process cleaning, cleaners and degreasers, and dry cleaning.
NP 4 is a nonionic surface active agent compatible with all other nonionic, anionic, or cationic substances.
Electrolytes, for example, neutral salts, alkalis, and – to a lesser extent – acids, reduce the water solubility of NP 4 and may lead to their salting out, especially at high concentrations and temperatures
NP 4 has excellent resistance to compounds that cause hard water to metal salts, including those of heavy metals, acids, alkalis, reductive agents, and oxidative agents based on peroxide.
Emulsifying action of NP 4: The excellent emulsifying action of NP 4 allows the preparation of stable emulsions.
NP 4 is the most suitable for the various oils and solvents:
NP 4 is ideal for mineral oils, petrolatum, and similar aliphatic hydrocarbons
*Application Areas of NP 4:
Agrochemicals
Cosmetics
Detergents
I&I
Metal Working
Paints and Coatings
Pesticides & Biocides
Pulp & Paper
Textiles & Leather
*Please check local and international regulations
Uses of NP 4:
Cleaning product formulations
Paints and coatings
Emulsion polymerization
Anywhere there is a need for increased surface activity
Benefits of NP 4:
Deliver a combination of economy and performance
Excellent detergency and wetting
Good solubilization and emulsification
Properties
Application Benefits
Compatibility: NP 4 is compatible with Quats
Product Use and Formulating
Bleach Stable: Not Recommended
Typical Properties of NP 4:
% Actives: 100 %
Active substance content: about 100 %
Appearance at 20 °C: viscous, slightly yellow liquid
Chemistry: Alkylphenol Ethoxylate (APE)
pH value (DIN EN 1262), 5 % as is in ethanol/water 1:1: about 6 – 8
Solubility at 20 °C in water: insoluble
Density (DIN 51757) at 50 °C: about 1.0 g/cm³
Viscosity (DIN 53015) at 50 °C: about 43 mPas
Cloud Point °C @1% Aqueous (ASTM D 2024): Insoluble
Cloud point (EN 1890): about 36 – 38 °C (5 g in 25 g 25 % BDG solution)
CMC (25°C) ppm: Insoluble PPM
Foam Height mm - Initial (0.1 wt% actives): Insoluble
Form: Liquid
HLB: 8.9
Moles EO: 4
Pour Point: -28 °C
Pour point (DIN/ISO 3016): < -10°C
Flashpoint (DIN/ISO 2592): ca. 220 °C
Lime-soap dispersion action (DIN 53903): --- (insoluble)
Surface tension (DIN 53914) at 20 °C: --- (insoluble)
Nonylphenol (NP) and nonylphenol ethoxylates (NPEs) are produced in large volumes, with uses that lead to widespread release to the aquatic environment.
NP is persistent in the aquatic environment, moderately bioaccumulative, and highly toxic to aquatic organisms.
NP’s primary use is in the manufacture of NPEs.
NPEs are nonionic surfactants that are used in a wide variety of industrial applications and consumer products.
NPEs, though less toxic than NP, are also highly toxic to aquatic organisms and, in the environment, degrade to more environmentally persistent NP.
NPEs were once commonly used in household laundry detergents.
EPA and the detergent manufacturers have cooperated to eliminate this use.
However, NPEs are still widely used in large quantities in industrial laundry detergents and have additional uses that lead to release into water.
Therefore, EPA intends to initiate action to address its concerns about potential ecological effects due to the manufacturing, processing, distribution in commerce, and uses of NP and NPEs.
Additionally, EPA continues to have some concerns about potential risks to human health.
EPA anticipates that the actions in this Action Plan will further reduce human exposure, thereby reducing concerns associated with NP and NPEs.
