Polyoxyethylene nonylphenol ether (NPEs), often known by trade names like NP-4, NP-9 or NP-40, is a versatile, nonionic surfactant used widely for its emulsifying, wetting, and dispersing properties in industrial cleaning, paints, pesticides, and textiles. These compounds, generally CAS 9016-45-9, effectively lower surface tension.
2. Specification
Type | Appearance | Colour | Hydroxyl value | Cloud point (℃) | PH |
(25℃) | (Pt-Co) | mgKOH/g | (1% aque. solu.) | (1% aque. solu.) | |
NP 4 | Colorless liquid | ≤40 | 135~145 | —— | 5.0~7.0 |
NP 5 | Colorless liquid | ≤40 | 122~132 | —— | 5.0~7.0 |
NP 6 | Colorless liquid | ≤40 | 110~122 | —— | 5.0~7.0 |
NP 7 | Colorless liquid | ≤40 | 100~110 | —— | 5.0~7.0 |
NP 8 | Colorless liquid | ≤40 | 94~102 | —— | 5.0~7.0 |
NP 9 | Colorless liquid | ≤40 | 88~94 | 50~60 | 5.0~7.0 |
NP 10 | Colorless liquid | ≤40 | 83~88 | 60~67 | 5.0~7.0 |
NP 13 | White paste | ≤40 | 68~73 | 85~90 | 5.0~7.0 |
NP 15 | White paste | ≤40 | 60~66 | 90~95 | 5.0~7.0 |
NP 18 | White paste | ≤40 | 53~58 | >95 | 5.0~7.0 |
NP 21 | White paste | ≤40 | 44~54 | >100 | 5.0~7.0 |
NP 30 | White paste | ≤40 | 34-39 | >100 | 5.0~7.0 |
NP 40 | White flake | ≤40 | 26~31 | >100 | 5.0~7.0 |
Test Method | —— | ISO 2211 | GB/T 7384 | GB/T 5559 | ISO 4316 |
3. Applications
Used as emulsifier, washing agent, wetting agent, penetrating agent, dispersing agent, degreasing agent, refining agent and chemical intermediate in the industry.
Key Applications and Properties
Industrial & Household Cleaning: Used as detergents and cleaning agents in both domestic and industrial applications.
Textiles and Coatings: Functions as a detergent in wool spinning and a dispersion agent in water-based paints.
Agricultural and Chemical: Serves as an emulsifier for pesticides and a stabilizer for latex or colloidal particles.
Chemical Stability: Exhibits high stability against acids, alkalis, and oxidizers.
4. Package and Storage
Package: (NP 4~21): 1000Kg/ IBC drum or 200Kg / metal drum (Net weight).
(NP 40) 25Kg / kraft bag (Net weight).
Shelf Life: two years.
5. Physical Characteristics
Appearance: Typically a colorless to slightly amber/orange oily liquid or waxy solid.
Structure: Composed of nonylphenol and an ethylene oxide chain, which determines its hydrophilic-lipophilic balance (HLB).
6. Safety and Hazards
Health Hazards: Harmful if swallowed; causes serious eye damage and mild skin irritation.
Environmental Hazards: Highly toxic to aquatic environments with long-lasting effects.
Handling: Requires proper protective equipment (gloves, goggles) and, in case of inhalation or contact, immediate medical attention.
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