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Phosphoric acid

greener alternative

ACS reagent, ≥85 wt. % in H2O

Orthophosphoric acid
Fórmula linear:
Número CAS:
Peso molecular:
Número EC:
Número MDL:
ID de substância PubChem:

Nível de qualidade



ACS reagent

densidade de vapor

3.4 (vs air)

pressão de vapor

2.2 mmHg ( 20 °C)
5 mmHg ( 25 °C)


≥85% (with NaOH, titration)



características do produto alternativo mais ecológico

Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.


≥85 wt. % in H2O


NMR: suitable


Reducing substances, passes test
≤0.001% volatile acids (as CH3COOH)


APHA: ≤10


158 °C (lit.)


~40 °C (lit.)


1.685 g/mL at 25 °C (lit.)

traços de ânion

chloride (Cl-): ≤3 ppm
nitrate (NO3-): ≤5 ppm
sulfate (SO42-): ≤0.003%

traços de cátion

As: ≤1 ppm
Ca: ≤0.002%
Fe: ≤0.003%
K: ≤0.005%
Mg: ≤0.02%
Mn: ≤0.5 ppm
Na: ≤0.025%
Sb: ≤0.002%
heavy metals: ≤0.001% (by ICP)

categoria alternativa mais ecológica


SMILES string




InChI key


Gene Information

human ... SRC(6714)

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Descrição geral

We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for energy efficiency. Find details here.
Phosphoric acid (H3PO4), also known as orthophosphoric acid, is an inorganic acid. It has a wide range of industrial applications such as an intermediate to produce animal feedstock, to prepare stock solutions for workup procedures and to treat the metal surfaces for better adhesion of paint and resin coatings. In the food industry it is used as a preservative, an acidulant and flavor enhancer.


Phosphoric acid may be employed as standard for the determination of phosphorus-31 nuclear magnetic resonance (31P NMR) chemical shifts of the common phospholipids. It may be employed in the following studies:
  • As external standard for the analysis of lipid composition of human white matter by 31P NMR spectroscopy.
  • As external standard during the acid-labile phosphorylation of histone H4 by 31P NMR spectroscopy.
  • As reference standard to investigate the surface species present on silica/alumina-supported sodium phosphates by pre- and postreaction MAS31P-NMR and FTIR spectroscopies.
  • As catalyst in the vapor-phase Fries rearrangement of phenylacetate at 623K over a series of surface modified and unmodified ZSM-5.
  • As an eco-friendly reagent for the removal of protecting groups like tert-butyl carbamates, tert-butyl esters and tert-butyl ethers.


500, 6×500 mL in PVC-coated bottle
2.5, 6×2.5 L in PVC-coated bottle

Outras notas

Concentrated phosphoric acid is approx. 85% H3PO4 (aqueous).


CorrosionExclamation mark

Palavra indicadora


Frases de perigo

Classificações de perigo

Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B

Código de classe de armazenamento

8A - Combustible, corrosive hazardous materials



Ponto de fulgor (ºF)

Not applicable

Ponto de fulgor (ºC)

Not applicable

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Aqueous phosphoric acid as a mild reagent for deprotection of tert-butyl carbamates, esters, and ethers.
Li B, et al.
The Journal of Organic Chemistry, 71(24), 9045-9050 (2006)
Myers RL.
The 100 Most Important Chemical Compounds: A Reference Guide, 220-220 (2007)
A simple method of increasing the adhesion of acrylic filling materials to enamel surfaces.
Buonocore MG.
Journal of Dental Research, 34(6), 849-853 (1955)
J M Fujitaki et al.
Biochemistry, 20(12), 3658-3664 (1981-06-09)
Phosphorus-31 nuclear magnetic resonance (31P NMR) is used to investigate acid-labile phosphorylation of histone H4. 31P NMR detects phosphorylated histidine residues in in vitro enzymatically phosphorylated H4. The source of kinase is nuclei from either regenerating rat liver or Walker-256
Internal versus external surface active sites in ZSM-5 zeolite: Part 1. Fries rearrangement catalyzed by modified and unmodified H3PO4/ZSM-5.
Ghiaci M, et al.
Applied Catalysis A: General, 298, 32-39 (2006)


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