Home > Products > Phosphates
Phosphoric acid (also known as orthophosphoric acid or
phosphoric(V) acid) is a mineral (inorganic) and weak acid having
the chemical formula H3PO4.Applications
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.
Phosphoric acid specifications
|Application||Demand (2006) in thousands of tons||Main phosphate derivatives|
|Soaps and detergents||1836||STPP|
|Food industry||309||STPP (Na5P3O10), SHMP, TSP, SAPP, SAlP, MCP, DSP (Na2HPO4), H3PO4|
|Water treatment||164||SHMP, STPP, TSPP, MSP (NaH2PO4), DSP|
|Toothpastes||68||DCP (CaHPO4), IMP, SMFP|
|Other applications||287||STPP (Na3P3O9), TCP, APP, DAP, zinc phosphate (Zn3(PO4)2), aluminium phosphate (AlPO4, H3PO4)|
|Appearance||Transparent Colorless Sticky liquid|
|Arsenic as As||≤0.5Mg/kg|
|Fluoride as F||≤10Mg/kg|
|Heavy metals as Pb||≤5Mg/kg|
|Reductive Matter as H3PO4||≤120Mg/kg|
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.
As the electrolyte in phosphoric acid fuel cells.
With distilled water (23 drops per gallon) as an electrolyte in
As a catalyst in the hydration of alkenes to produce alcohols,
As an electrolyte in copper electropolishing for burr removal and
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
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
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.
We receive enquiries in English, Espaol (Spanish),(Russian), Franais (French) and (Arabic). Our professional team will reply to you within one business day.
Please feel FREE to contact us!