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Phosphoric acid

Country/Region china
Company Henan Chemsino Industry co.,ltd
Categories Metal Cleaning Agent
Telephone +86-371-55625861
ICP License Issued by the Chinese Ministry
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    Phosphoric acid

    Phosphoric acid

    Home > Products > Phosphates
    Phosphoric acid
    Phosphoric acid (also known as orthophosphoric acid or phosphoric(V) acid) is a mineral (inorganic) and weak acid having the chemical formula H3PO4.
    The dominant use of phosphoric acid is for fertilizers, consuming approximately 90% of production. Other far smaller but still significant uses include food additive, cleaning products, and water treatment.
    ApplicationDemand (2006) in thousands of tonsMain phosphate derivatives
    Soaps and detergents1836STPP
    Food industry309STPP (Na5P3O10), SHMP, TSP, SAPP, SAlP, MCP, DSP (Na2HPO4), H3PO4
    Water treatment164SHMP, STPP, TSPP, MSP (NaH2PO4), DSP
    Toothpastes68DCP (CaHPO4), IMP, SMFP
    Other applications287STPP (Na3P3O9), TCP, APP, DAP, zinc phosphate (Zn3(PO4)2), aluminium phosphate (AlPO4, H3PO4)

    Phosphoric acid specifications
    AppearanceTransparent Colorless Sticky liquid
    Assay as(H3PO4)≥85.0%
    Arsenic as As≤0.5Mg/kg
    Fluoride as F≤10Mg/kg
    Heavy metals as Pb≤5Mg/kg
    Reductive Matter as H3PO4≤120Mg/kg

    Food additive
    Food-grade phosphoric acid (additive E338) is used to acidify foods and beverages such as various colas and jams. It provides a tangy or sour taste. Various salts of phosphoric acid, such as monocalcium phosphate, are used as leavening agents. Phosphoric acid in soft drinks has the potential to cause dental erosion. Phosphoric acid also has the potential to contribute to the formation of kidney stones, especially in those who have had kidney stones previously.
    Other applications
    Among many applications, phosphoric acid is used:
    As a solution for anodizing.
    As an external standard for phosphorus-31 nuclear magnetic resonance (31P NMR).
    As a buffer agent in biology and chemistry. For example, a buffer for high-performance liquid chromatography.
    As a chemical oxidizing agent for activated carbon production, as used in the Wentworth process.[20]
    As the electrolyte in phosphoric acid fuel cells.
    With distilled water (23 drops per gallon) as an electrolyte in oxyhydrogen generators.
    As a catalyst in the hydration of alkenes to produce alcohols, predominantly ethanol.
    As an electrolyte in copper electropolishing for burr removal and circuit-board planarization.
    As a flux by metal workers and hobbyists (such as model railroaders) as an aid to soldering.
    In compound semiconductor processing, phosphoric acid is a common wet etching agent: for example, in combination with hydrogen peroxide and water it is used to etch InGaAs selective to InP.
    Heated in microfabrication to etch silicon nitride (Si3N4). It is highly selective in etching Si3N4 instead of SiO2, silicon dioxide.
    As a cleaner by construction trades to remove mineral deposits, cementitious smears, and hard-water stains.
    As a chelant in some household cleaners aimed at similar cleaning tasks.
    In hydroponics pH solutions to lower the pH of nutrient solutions. While other types of acids can be used, phosphorus is a nutrient used by plants, especially during flowering, making phosphoric acid particularly desirable.
    As a pH adjuster in cosmetics and skin-care products.
    As a dispersing agent in detergents and leather treatment.
    As an additive to stabilize acidic aqueous solutions within a wanted and specified pH range.
    As a sanitizing agent in the dairy, food, and brewing industries.
    As a main reactive agent in electrochemical weld cleaning.
    In soil organic carbon determination.

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