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30417-M

Phosphoric acid

puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥85%

Synonym(s):

Orthophosphoric acid

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About This Item

Linear Formula:
H3PO4
CAS Number:
7664-38-2
Molecular Weight:
98.00
UNSPSC Code:
12352106
NACRES:
NA.21
PubChem Substance ID:
329753503
EC Number:
231-633-2
Beilstein/REAXYS Number:
1921286
MDL number:
MFCD00011340
Assay:
≥85%
Form:
liquid
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Quality Level

100

agency

reag. ISO, reag. Ph. Eur.

vapor density

3.4 (vs air)

vapor pressure

2.2 mmHg ( 20 °C), 5 mmHg ( 25 °C)

grade

ACS reagent, puriss. p.a.

assay

≥85%

form

liquid

impurities

reducing impurities, in accordance, residual solvents, in accordance, substances precipitated by ammonia, in accordance, ≤0.001% KMnO4 red. matter (as O), ≤0.001% heavy metals (as Pb), ≤0.001% insoluble matters (in water), ≤0.001% volatile acids (as CH3COOH)

bp

158 °C (lit.)

mp

~40 °C (lit.)

density

1.685 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.0002%, fluoride (F-): ≤0.0001%, nitrate (NO3-): ≤0.0003%, phosphite, hypophosphite (as H3PO3): ≤0.002%, phosphite, hypophosphite (as H3PO3): in accordance, sulfate (SO42-): ≤0.003%

cation traces

As: ≤0.00005%, Ca: ≤0.001%, Cd: ≤0.0001%, Co: ≤0.0001%, Cr: ≤0.0001%, Cu: ≤0.0001%, Fe: ≤0.0005%, K: ≤0.0005%, Mg: ≤0.0005%, Mn: ≤0.00005%, Na: ≤0.002%, Ni: ≤1 mg/kg, Pb: ≤0.0001%, Sb: ≤2 mg/kg, Zn: ≤0.0002%

SMILES string

OP(O)(O)=O

suitability

passes test for appearance of solution

InChI

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

InChI key

NBIIXXVUZAFLBC-UHFFFAOYSA-N

Gene Information

human ... SRC(6714)

General description

Phosphoric acid (H3PO4) is one of the most important and useful mineral acids. It is used as a catalyst for various organic reactions. It is also used as an inorganic acid electrolyte for fuel cell applications.

Application

Phosphoric acid can be used as an activating agent for the activation of porous carbonaceous materials due to its ability to produce P-containing functional groups in the carbon matrix. These groups are excellent for promoting the formation of carbon micropores, which are useful for developing electrochemical energy storage devices.

Other Notes

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

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pictograms

CorrosionExclamation mark
GHS05,GHS07

signalword

Danger

Hazard Classifications

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

Storage Class

8A - Combustible corrosive hazardous materials

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

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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