NP 4

NP 4

NP 4 is an oil-soluble surfactant with excellent emulsification properties at low HLB.

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 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 be concerned 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.