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STEPAN® MWA-390

STEPAN® MWA-390 is an alcohol phosphate, functioning as a low-foaming emulsifier. Its application extends to synthetic and semi-synthetic lubricants, gear and chain oils, metalworking fluids, hydraulic fluids, and plasticizers. It falls within the category of surfactants and has a presence in the industrial products market.

Brand: STEPAN (48 products)

End Uses: Chain Oils, Gear Oils, Hydraulic Fluids, Metalworking Fluids, Semi-synthetic Metalworking Fluids, Synthetic Metalworking Fluids

Functions: Emulsifier

Compatible Substrates & Surfaces: Metal

Chemical Family: Phosphates

Features: Corrosion Resistant, Improved Anti-Wear

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Chemical Family
Chemical Name
Fluids & Lubricants Functions
Technologies
Product Families

Features & Benefits

Fluids & Lubricants Features

Applications & Uses

Markets
Applications
Compatible Substrates & Surfaces
Fluids & Lubricants Type
Fluids & Lubricants End Use
Applications

STEPAN MWA-390 is an alcohol phosphate used as a low foaming emulsifier in synthetic and semi-synthetic lubricants, gear and chain oils, metalworking fluids, hydraulic fluids, and plasticizers.

Solubility in Various Solvents

Solubility in Various Solvents (wt % STEPAN MWA-390 in solvent)

Solvent 5.00% 1.00% 0.10%
Water Turbid, Separates Turbid Separates Turbid, Stable
10% Sodium Hydroxide Turbid, Separates Turbid Separates Turbid, Stable
10% Sulfuric Turbid, Separates Turbid Separates Turbid, Stable
Ethanol Clear Solution Clear Solution Clear Solution
Isopropanol Clear Solution Clear Solution Clear Solution
Ethylene Glycol Turbid, Stable Turbid, Stable Turbid, Stable
Butyl Cellusolve Clear Solution Clear Solution Clear Solution
Acetone Clear Solution Clear Solution Clear Solution
Kerosene Turbid, Separates Turbid Separates Clear Solution
Stoddard Solvent Turbid, Separates Turbid Stable Clear Solution
Mineral Oil Turbid, Separates Turbid Stable Clear Solution
Benzene Clear Solution Clear Solution Clear Solution
Carbon Tetrachloride Clear Solution Clear Solution Clear Solution
Butyl Stearate Turbid, Separates Turbid Stable Clear Solution

Properties

Physical Form
Appearance
Water white clear liquid (at 25°C)
Typical Properties
ValueUnitsTest Method / Conditions
Actives Content100%-
Boiling Point (at 760mm Hg)200°C-
Cloud Point (in 1% aqueous solution)max. 25°C-
Critical Micelle Concentration (CMC)0.005%-
Density (at 25°C)1.07g/ml-
Draves Wetting (% product required for 25 seconds, at 25°C)0.13%-
Draves Wetting (% product required for 25 seconds, at 71°C)0.06%-
Flash Point138°CTAG Flash Point Tester
HLB 6.7--
pH (in 1% aqueous, at 25°C )6--
Ross-Miles Foam Height (in 0.1% aqueous, at 40°C, Hard Water 10 min)5mm-
Ross-Miles Foam Height (in 0.1% aqueous, at 40°C, Hard Water 10 min)40mm-
Ross-Miles Foam Height (in 0.1% aqueous, at 40°C, Hard Water initial)15mm-
Ross-Miles Foam Height (in 0.1% aqueous, at 40°C, Hard Water initial)40mm-
Stability in Acids (at 25°C)Stable--
Stability in Bases (at 25°C)Stable--
Surface Tension (in 0.01% aqueous, at 25°C)26dynes/cm-

Regulatory & Compliance

Safety & Health

Health Effects

STEPAN MWA-390 is practically non-toxic orally (Oral LD₅₀ = 7500 mg/kg in rats) and causes severe skin and mild eye irritation. See SDS for more information.

Packaging & Availability

Packaging Type
Standard Packaging

STEPAN MWA-390 is available in drums.

Storage & Handling

Storage & Handling

Normal safety precautions (e.g., gloves and safety goggles) should be employed when handling STEPAN MWA-390. Handling Contact with eyes and skin should be avoided. STEPAN MWA-390 should be stored in a cool, dry place in closed containers. See SDS for more information.

  • Stable in Freezing at 25°C(77°F)
  • Stable in Heat at 25°C (77°F)
Product Benefits
  • Imparts excellent corrosion inhibition, especially for aluminum metal.
  • Alternative anionic emulsifier to heavy sulfonates for providing antiwear properties
STEPAN® MWA Products Product Class Functional Characteristics
Emulsification Lubricity Antifoaming Metal Cleaning Hard Water Tolerance Antimisting Corrosion Inhibition Coupling Agent
300 Series Phoshate X X   X     X