L-590 Parts Washer Compound

L-590 is a highly concentrated cleaning formulation specifically intended for use in automated cleaning applications. It was specifically formulated for removing grease, oil, scale, and smut from ferrous metal surfaces. This product combines potent wetting and water conditioning agents with an alkaline build to work effectively under extremely heavy soil conditions. Specially formulated to provide interim process rust inhibition, reduce spotting and greatly reduce scale build up in machines.

Physical Properties

Appearance: White Clear Liquid
pH @ 1% Solution: 12.6
Odor: Mild
Foaming Action: Very Low
Solubility in Water: Complete
Rinsing Action: Excellent
Metal Safety: Ferrous Metals Only
Flash Point: None
Specific Gravity: 1.15
Stability: Stable
Standard Container: 55 Gallon Drum
Refer to our Material Safety Data Sheet for additional information.

Usage and Dilution Instructions

This product is intended for use in automated spray or soak application parts washers. Solution concentrations should be maintained between 5 and 16 ounces per gallon of water. Cleaning solution temperatures should be maintained between 120° and 170° F. Periodic adds of 1 to 2 ounces per gallon should be made to extend cleaning solution life. Usage may vary depending on soil load, nature of parts, equipment design, time requirements and other physical properties related to the process.

Handling and Storage

This is a highly alkaline product containing Potassium Hydroxide. Use good industrial hygiene practices such as wearing chemical safety goggles, rubber gloves, impermeable apron, and rubber boots as necessary to avoid personal contact with this product. In case of contact, flush eyes and/or skin with plenty of water for at least 15 minutes. Consult physician and remove contaminated clothing promptly. Store product in tightly closed containers between 50° and 85° F. Rotate stock. When stored as stated above, shelf life is a minimum of 2 years.


Progress Chemical guarantees its products will perform to your satisfaction when used in accordance to our recommendations. We back this guarantee with over 65 years experience. Our company has been certified to ISO 9001-2015 Quality Standards.