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85% Phosphoric Acid (also referred to as Orthophosphoric Acid) is a highly concentrated form of phosphoric acid, commonly used in a variety of industrial and commercial applications. It is typically a colorless, odorless, and highly viscous liquid with a strong acidic nature. Below are some key details and features of 85% Phosphoric Acid:

Key Features of 85% Phosphoric Acid:

Chemical Formula and Concentration:

The chemical formula of phosphoric acid is H₃PO₄.

In its 85% form, it contains 85% pure phosphoric acid by weight, with the remaining 15% being water. This concentration is one of the most commonly used grades for industrial applications.

Physical Properties:

Appearance: 85% phosphoric acid is typically a clear, colorless to slightly yellow liquid.

Viscosity: The acid is relatively viscous, which makes it thicker than many other acids, such as sulfuric or hydrochloric acid.

Odor: It is typically odorless but may have a slight chemical odor.

Density: It has a high density, which increases with its concentration.

Boiling and Melting Points: The boiling point is about 158°C (316°F), and the freezing point is around 21°C (69.8°F), depending on the concentration and the presence of impurities.