300 Derusting & Descaling Compund

300 Derusting and Descaling Compound is a highly acidic granular compound with added wetting and penetrating agents. It is specifically formulated for removing rust, scale, and oxides from metal parts during mass finishing operations. This product is biodegradable.

Physical Properties

Appearance: Beige Granular Powder
pH @ 1% Solution: 1.0
Odor: Acidic
Foaming Action: Moderate
Solubility in Water: Complete
Rinsing Action: Excellent
Flash Point: None
Bulk Density: 65 lbs/cu. ft.
Stability: Stable
Refer to our Material Safety Data Sheet for additional information.

Usage and Dilution Instructions

Normal dilution range is from 1 to 4 ounces per gallon of water. If parts are oily or excessively dirty, they should be degreased in alkaline cleaner first. Care should be taken to determine cycle time requirements and concentration to be used, which will vary depending on nature of parts, amount of rust or scale on parts, and finish desired. Parts would normally be neutralized in an alkaline product or other inhibitor after being descaled in order to prevent further scaling or rusting.

Handling and Storage

This is a highly acidic product. It forms dilute sulfuric acid when dissolved in water. Use good industrial hygiene practices such as wearing chemical safety goggles, face shield, rubber gloves, impermeable apron, and boots as necessary to prevent personal contact. Store in a cool dry place in a properly labeled closed container When stored as 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.