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Merck

695017

Sigma-Aldrich

Phosphorsäure

ACS reagent, ≥85 wt. % in H2O

Synonym(e):

Orthophosphorsäure

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About This Item

Lineare Formel:
H3PO4
CAS-Nummer:
Molekulargewicht:
98.00
Beilstein:
1921286
EG-Nummer:
MDL-Nummer:
UNSPSC-Code:
12352106
PubChem Substanz-ID:
NACRES:
NA.21

Qualität

ACS reagent

Qualitätsniveau

Dampfdichte

3.4 (vs air)

Dampfdruck

2.2 mmHg ( 20 °C)
5 mmHg ( 25 °C)

Assay

≥85% H3PO4 basis (by NaOH, titration)

Form

liquid

Konzentration

≥85 wt. % in H2O

Methode(n)

NMR: suitable

Verunreinigungen

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

Farbe

APHA: ≤10

bp

158 °C (lit.)

mp (Schmelzpunkt)

~40 °C (lit.)

Dichte

1.685 g/mL at 25 °C (lit.)

Anionenspuren

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

Kationenspuren

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)

SMILES String

OP(O)(O)=O

InChI

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

InChIKey

NBIIXXVUZAFLBC-UHFFFAOYSA-N

Angaben zum Gen

human ... SRC(6714)

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Allgemeine Beschreibung

Phosphoric acid (H3PO4) is useful in industry for treating the metal surfaces to obtain better adhesion of paint and resin coatings.

Anwendung

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.

Sonstige Hinweise

Konzentrierte Phosphorsäure, ca. 85 % H3PO4 (wässrig).

Piktogramme

CorrosionExclamation mark

Signalwort

Danger

Gefahreneinstufungen

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

Lagerklassenschlüssel

8B - Non-combustible corrosive hazardous materials

WGK

WGK 1

Flammpunkt (°F)

Not applicable

Flammpunkt (°C)

Not applicable


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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)
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)
D S Marinier et al.
Journal of lipid research, 29(9), 1237-1243 (1988-09-01)
In order to study the lipid composition of human white matter, we have developed a 31P NMR spectroscopy method, which allows the determination and quantitation of the main phospholipids found in biological membranes. The technique is based upon the use
P Meneses et al.
Journal of lipid research, 29(5), 679-689 (1988-05-01)
The common phospholipids from biological sources were quantitated using phosphorus-31 nuclear magnetic resonance (NMR) spectroscopy in conjunction with an analytical reagent composed of two parts: 1) 2 ml of reagent chloroform in which was dissolved 0.01-100 mg of crude tissue

Protokolle

This procedure may be used for determination of Endoproteinase Glu-C enzymatic activity using N-t-Boc-L-glutamic acid α-phenyl ester as the substrate.

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