Acid Alum

Acid alum can be used in municipal and industrial water treatment applications to remove turbidity, color, suspended solids and oil (emulsion breaking). It is commonly used in the paper industry for pitch control. USALCO Acid Alum is especially effective in water treatment applications where TOC (total organic carbon) removal is important. It produces a more dense and settleable floc than water treated with a comparable amount of standard alum. Acidified alum also reduces the residual soluble aluminum in treated water.

Acid Alum Solution Specs

USALCO Acid Alum, Aluminum Sulfate acidized with either 5% or 7% free acid, is a high quality, iron-free, clear solution that meets or exceeds the specifications of the American Water Works Association Standard B403-09. The solution also complies with the requirements of “NSF/ANSI Standard 60: Drinking Water Treatment Chemicals – Health Effects” at a maximum dosage of 150 mg/L.

USALCO manufactures iron free Alum by dissolving alumina tri-hydrate (ATH) into water and sulfuric acid.

➔ Download the Acid Alum PRODUCT DATA SHEET (PDF)

Safety Data Sheets

➔ Aluminum Sulfate Solution 5% Acid SDS (PDF)
➔ Aluminum Sulfate Solution 7% Acid SDS (PDF)

Availability & Transportation

  • USALCO provides Acid Alum in bulk truckload quantities for municipalities and industrial users.
  • We use dedicated trucks to insure quality and have multiple plants to meet your needs.

Benefit from Reduced Operating Costs

USALCO Aluminum Sulfate is widely used because it is a cost-effective, clear solution that mixes well in water treatment. It does not add color to the water treatment process. Another benefit of our acid alum product is a marked improvement in the settled water filterability as less sludge is typically produced. The result is higher quality water at a reduced operating cost.

Typical Properties of Alum 7% Acid Solution

Property UM Acid Alum
Al2O3 Wt.% 5.8 – 6.2
Fe2O3 ppm 50 max
Specific Gravity@ 60°F - 1.28 – 1.30
Baume @ 60°F - 33.45
Density - 10.65 – 10.85
Color Lbs/Gal Clear to Amber or Light Green
Dry 17% Alum Wt.% 35.3
pH - .50 – 1.20

Learn More

Need assistance? Contact us today to learn more about USALCO’s acid alum solutions.