Phosphoric acid CAS 7664-38-2

Phosphoric acid, also known as orthophosphoric acid (molecular structure formula H3PO4), pure product is colorless transparent viscous liquid or rhombohedral crystals, odorless, taste is very acidic. 85% phosphoric acid is colorless transparent or slightly light-colored, thick liquid. Melting point 42.35 ° C, specific gravity 1.70, high boiling point acid, can be mutually soluble with water at any ratio, boiling point 213 ° C (loss of 1/2 water), then generated pyrophosphoric acid. When heated to 300℃, it becomes metaphosphoric acid. Relative density 181.834, soluble in water, soluble in ethanol. Phosphoric acid is Chemicalbook a common inorganic acid, is medium strong acid. Its acidity is weaker than strong acids such as sulfuric acid, hydrochloric acid and nitric acid, but stronger than weak acids such as acetic acid, boric acid and carbonic acid. Phosphoric acid reacts with sodium carbonate at different pH to produce different acid salts. It can irritate the skin to cause inflammation and destroy muscle tissue. Concentrated phosphoric acid has an erosive effect when heated in porcelain. It is hygroscopic and kept sealed. Commercially available phosphoric acid is a viscous concentrated solution containing H3PO482%, the greater viscosity of the phosphoric acid solution is due to the presence of hydrogen bonds in the solution.
The main application areas of phosphoric acid are as follows: phosphate treatment of metal surfaces steel tube, the preparation of electrolytic polishing solution and chemical polishing solution; polishing of aluminum products; the manufacture of a variety of phosphates, feed-grade calcium hydrogen phosphate, manganese phosphate acid, potassium pyrophosphate; the pharmaceutical industry for the manufacture of sodium glycerophosphate, ferric acid phosphate, penicillin, the manufacture of regulating the pH; used to manufacture zinc phosphate as a dental fillings adhesive; plastics used in phenolic resins condensation of the Catalyst for the condensation of phenolic resins; dyes and intermediates production of desiccant; printing for the preparation of wiping offset color printing plate stains on the cleaning agent; matches for impregnation of match stems, can make the burning match stems do not become ash and charcoal, the use of a safer; metallurgy used in the production of refractory mud to improve the life of steel furnaces; rubber used for the slurry coagulant and the production of raw materials for the production of inorganic binder; coatings used for metal antirust paints; the food industry as an Acidic flavoring agent.

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Model:
7664-38-2
Brand:
bosschemical
Code:
7664-38-2

Product Description

Phosphoric acid

CAS No.7664-38-2

Alias:phosphoricacidsolutions;Phosphorsaeureloesungen;Sonac;wc-reiniger;White phosphoric acid;whitephosphoricacid;phosphoric acid for technical;phosphoric acid，technical，highly purified

Molecular formula：H3O4P

Molecular weight：98

Structural formula：

磷酸结构式

1. Performance and use:

Colorless transparent or slightly light-colored thick liquid, pure phosphoric acid is colorless crystal, odorless, with acidic taste. Mainly used in phosphate industry, electroplating, polishing industry, sugar industry, compound

fertilizer. In the food industry as acidifier, yeast nutrient, etc.

Mainly used in ethylene hydration production of ethanol with catalyst, high purity phosphate, pharmaceutical manufacturing, chemical reagents.

Mainly used in the production of chemical fertilizers, detergents, food and feed additives, flame retardants and a variety of phosphate uses commonly used as an analytical reagent uses for volumetric and colorimetric analysis and other uses in the production of silicon plane tubes and integrated circuits, the common use of aluminum film for the electrode lead, the need for photolithography of the aluminum film, the phosphoric acid used as an acidic cleaning and corrosion agent. It can be formulated with acetic acid.

Can be used as acidifier and yeast nutrient. It can be used as souring agent for seasoning, canned food and refreshing drinks. Used as yeast nutrient in brewing to prevent the propagation of stray bacteria. Used as yeast nutrient, chelating agent, antioxidant synergist and inorganic acidulant, acidity of 2.3 ~ 2.5, can be used for compound seasoning, canned food, cheese, jelly and cola-type drinks, Chemicalbook according to the production needs of the appropriate amount of use. Uses Wet phosphoric acid is mainly used in the manufacture of various phosphates, such as ammonium phosphate, potassium dihydrogen phosphate, disodium hydrogen phosphate, trisodium phosphate, etc. and condensed phosphate class. Refined phosphoric acid is used to make feed calcium phosphate. Used for metal surface phosphating treatment, formulated electrolytic polishing solution and chemical polishing solution for polishing aluminum products. Pharmaceutical industry for the manufacture of sodium glycerophosphate, iron phosphate, etc., but also for the manufacture of zinc phosphate as dental fillings adhesive. It is used as catalyst for phenolic resin condensation and as desiccant for dyes and intermediates production. Printing industry for the preparation of wipe offset color printing plate stains on the cleaning fluid. It is also used to formulate impregnating liquid for matchsticks. Metallurgical industry for the production of phosphoric acid refractory mud, improve the life of steelmaking furnace. It is the solidifying agent of rubber paste and the raw material for producing inorganic binder. Used as antirust paint for metal in paint industry. It is used for the determination of chromium, nickel, vanadium composition in steel, metal antirust, rubber coagulant, determination of non-protein nitrogen in serum, total cholesterol and whole blood glucose. Crystallized phosphoric acid is mainly used in microelectronics, high-energy batteries, laser glass and other manufacturing processes, as a high-purity catalyst, medical materials.

2.Technical indicators:

TEST	SPECIFICATION MIN.	MAX.	RESULT
(Cd)Cadmium (Cu))Copper	0 % 0 %	0.0005 % 0.0005 %	0.0005 % 0.0005 %
(K)Potassium(K)	0 %	0.005 %	0.005 %
(Mn)Manganese	0 %	0.0002 %	0.0002 %
(NO3)Nitrate	0 %	0.0003 %	0.0003 %
(Pb)Lead	0 %	0.0005 %	0.0005 %
(SO4)Sulfate	0 %	0.001 %	0.001 %
(Zn)Zinc	0 %	0.001 %	0.001 %
Arsenic(As)	0 ppm	0.5 ppm	0.5 ppm
Assay	85 %	100 %	100 %
Chloride(Cl)	0 %	0.0002 %	0.0002 %
Color(APHA)	0 APHA -	10 APHA -	10 APHA -
Ignitionresidue	0 %	0.1 %	0.1 %
Iron(Fe)	0 %	0.001 %	0.001 %
Nickel(Ni)	0 %	0.0005 %	0.0005 %
Reducing substances	0 %	0.005 %	0.005 %
Sodium(Na)	0 %	0.05 %	0.05 %
Volatile acid	0 mmol/g	0.0002 mmol/g	0.0002