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Merck

438081

Acide phosphorique

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ACS reagent, ≥85 wt. % in H2O

Synonyme(s) :

Acide orthophosphorique

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A propos de cet article

Formule linéaire :
H3PO4
Numéro CAS:
7664-38-2
Poids moléculaire :
98.00
UNSPSC Code:
12352106
NACRES:
NA.21
PubChem Substance ID:
329756407
EC Number:
231-633-2
Beilstein/REAXYS Number:
1921286
MDL number:
MFCD00011340
eCl@ss:
38070202
Assay:
≥85% (with NaOH, titration)
Concentration:
≥85 wt. % in H2O
Form:
liquid
Grade:
ACS reagent

Principaux documents

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grade

ACS reagent

Quality Level

200

vapor density

3.4 (vs air)

vapor pressure

2.2 mmHg ( 20 °C), 5 mmHg ( 25 °C)

assay

≥85% (with NaOH, titration)

form

liquid

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concentration

≥85 wt. % in H2O

technique(s)

NMR: suitable

impurities

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

color

APHA: ≤10

pH

<1 (100%)

bp

158 °C (lit.)

mp

~40 °C (lit.)

density

1.685 g/mL at 25 °C (lit.)

anion traces

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

cation traces

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)

greener alternative category

Enabling,

SMILES string

OP(O)(O)=O

InChI

1S/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4)

InChI key

NBIIXXVUZAFLBC-UHFFFAOYSA-N

Gene Information

human ... SRC(6714)

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Catégories apparentées

General description

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.
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Application

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.

Other Notes

L′acide phosphorique concentré est composé de H3PO4 à environ 85 % (aqueux).

pictograms

CorrosionExclamation mark
GHS05,GHS07

signalword

Danger

Hazard Classifications

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

Classe de stockage

8A - Combustible corrosive hazardous materials

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificats d'analyse (COA)

Lot/Batch Number
SDBB6784
SDBB6398
SDBB2170
SDBB1464
STBL4771

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Consulter la Bibliothèque de documents

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)
FTIR and 31 P-NMR spectroscopic analyses of surface species in phosphate-catalyzed lactic acid conversion.
Gunter GC, et al.
J. Catal., 164(1), 207-219 (1996)
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
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