Polishing solution co-product is a by-product generated from the chemical polishing of aluminum, also known as a Bright Dip operation (see Aluminum Polishing Solution page for more information). The acid typically contains a mixture of phosphoric acid, sulfuric acid, nitric acid, and also contains a small amount of dissolved aluminum with no detectable suspended solid. The co-product from the bright dip process is not a waste solution and actually has use in many industrial applications, such as the P-nutrient for biological wastewater treatment and fertilizer products.

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Fang Phos offers two types co-products for sales: P35 and PS45. 

• P35 typically contains:

  • H3PO4: 35.0% min.​

  • H2SO4: 1.5% max.

  • HNO3: 1.5% max.

  • Al: 1.5% max.

  • Sp. Gr. at 60 F: 1.25-1.27

• PS45 typically contains:

  • H3PO4: 35.0% min.​

  • H2SO4: ~10.0% max.

  • HNO3: 1.5% max.

  • Al: 1.5% max.

  • Sp. Gr. at 60 F: 1.36-1.38

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