Merck
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695017

Sigma-Aldrich

Phosphoric acid

ACS reagent, ≥85 wt. % in H2O

Synonym(s):
Orthophosphoric acid
Linear Formula:
H3PO4
CAS Number:
Molecular Weight:
98.00
Beilstein:
1921286
Número de EC:
Número MDL:
ID de la sustancia en PubChem:
NACRES:
NA.21

Nivel de calidad

200

grado

ACS reagent

densidad de vapor

3.4 (vs air)

presión de vapor

2.2 mmHg ( 20 °C)
5 mmHg ( 25 °C)

ensayo

≥85% H3PO4 basis (by NaOH, titration)

formulario

liquid

concentración

≥85 wt. % in H2O

technique(s)

NMR: suitable

impurezas

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

color

APHA: ≤10

bp

158 °C (lit.)

mp

~40 °C (lit.)

densidad

1.685 g/mL at 25 °C (lit.)

trazas de anión

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

trazas de catión

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)

InChI key

NBIIXXVUZAFLBC-UHFFFAOYSA-N

Gene Information

human ... SRC(6714)

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Descripción general

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

Aplicación

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.

Envase

2.5 L in poly bottle
100, 12×100, 500 mL in poly bottle

Otras notas

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

pictogramas

CorrosionExclamation mark

Palabra de señalización

Danger

Frases de peligro

Clasificaciones de peligro

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

Código de clase de almacenamiento

8B - Non-combustible, corrosive hazardous materials

WGK

WGK 1

Punto de inflamabilidad F

Not applicable

Punto de inflamabilidad C

Not applicable

Certificate of Analysis

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Certificate of Origin

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