Rohm and Haas

Opacifying Agent for Use in Liquid Detergent Products

Dow ACUSOL OP301 Opacifier imparts a milky, lotionized appearance to a wide variety of household liquid products.

Typical Properties
These properties are typical but do not constitute specifications.



% solids


Average particle size (µm)


Viscosity (mPa.s/cPs)


End Uses

  • Liquid laundry detergents
  • Two-in-one liquid detergents
  • Household cleaners
  • Dishwashing liquids
  • General purpose formulations

Application Information

  • ACUSOL OP301 is used to impart a "milky" or "lotionized" appearance to a liquid product, generally at addition levels of 0.1-1.0%.
  • It is recommended that ACUSOL OP301 is added last in the manufacturing cycle (i.e., after final pH adjustment). To avoid potential "shock" the product should be diluted with at least four times its own weight of water before use, then added very slowly to the final mix maintaining good agitation throughout the addition process.
  • Stability testing should be carried out on all opacified products. Four week stability tests under the following conditions are recommended: (1) room temperature; (2) oven 40-45°C; (3) cold 4-6°C; and (4) freeze/thaw, 3 cycles.

Handling and Storage

  • ACUSOL OP301 is not freeze/thaw stable and should therefore be kept at temperatures of 5 to 35°C. If kept under these conditions and in their original unopened containers, the product will have a shelf life of eighteen months or greater from date of manufacture.
  • If the product is stored in a diluted form, a preservative is required.

Material Safety Data Sheets

Dow maintains Material Safety Data Sheets (MSDS) on all of its products. These contain important information that you may need to protect your employees and customers against any known health and safety hazards associated with our products. We recommend you obtain copies of MSDS for our products from your local Dow technical representative or Dow. In addition, we recommend you obtain copies of MSDS from your suppliers of other raw materials used with our product.

Under the OSHA Hazard Communication Standard, workers must have access to and understand MSDS on all hazardous substances to which they are exposed. Thus, it is important that appropriate training and information be provided to all employees and that MSDS be available on any hazardous products in their workplace.

Dow sends MSDS on non-OSHA hazardous as well as OSHA-hazardous products to both "bill-to" and "ship-to" locations of all our customers upon initial shipment (including samples) of all of our products. Updated MSDS are sent upon revision to all customers of record. In addition, MSDS are sent annually to all customers of record.