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79622

Sigma-Aldrich

Phosphoric acid

puriss. p.a., crystallized, ≥99.0% (T)

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Synonym(s):
Orthophosphoric acid
Linear Formula:
H3PO4
CAS Number:
Molecular Weight:
98.00
Beilstein:
1921286
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

vapor density

3.4 (vs air)

vapor pressure

2.2 mmHg ( 20 °C)
5 mmHg ( 25 °C)

grade

puriss. p.a.

Assay

≥99.0% (T)

form

powder or crystals

quality

crystallized

impurities

≤0.002% KMnO4-reducing matter (as O)

bp

158 °C (lit.)

mp

~40 °C (lit.)
~40 °C

solubility

water: 850 g/L at 20 °C

density

1.685 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤5 mg/kg
nitrate (NO3-): ≤5 mg/kg
phosphite, hypophosphite (as H3PO3): ≤500 mg/kg
sulfate (SO42-): ≤30 mg/kg

cation traces

As: ≤1 mg/kg
Ca: ≤10 mg/kg
Cd: ≤1 mg/kg
Co: ≤1 mg/kg
Cr: ≤1 mg/kg
Cu: ≤1 mg/kg
Fe: ≤10 mg/kg
K: ≤5 mg/kg
Mg: ≤1 mg/kg
Mn: ≤1 mg/kg
Na: ≤50 mg/kg
Ni: ≤1 mg/kg
Pb: ≤1 mg/kg
Zn: ≤1 mg/kg

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

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1 of 4

This Item
46612330417P5811
Phosphoric acid puriss. p.a., crystallized, ≥99.0% (T)

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79622

Phosphoric acid

-
Phosphoric acid crystalline, ≥99.999% trace metals basis

Sigma-Aldrich

466123

Phosphoric acid

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

Sigma-Aldrich

30417

Phosphoric acid

Essential Grade
Phosphoric acid BioReagent, suitable for insect cell culture, 85%

Sigma-Aldrich

P5811

Phosphoric acid

Essential+ Grade
vapor pressure

2.2 mmHg ( 20 °C), 5 mmHg ( 25 °C)

vapor pressure

2.2 mmHg ( 20 °C), 5 mmHg ( 25 °C)

vapor pressure

2.2 mmHg ( 20 °C), 5 mmHg ( 25 °C)

vapor pressure

2.2 mmHg ( 20 °C), 5 mmHg ( 25 °C)

grade

puriss. p.a.

grade

-

grade

-

grade

-

assay

≥99.0% (T)

assay

≥99.999% trace metals basis

assay

≥85%

assay

85%

form

powder or crystals

form

crystalline

form

liquid

form

liquid

impurities

≤0.002% KMnO4-reducing matter (as O)

impurities

-

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% in water insoluble matters, ≤0.001% volatile acids (as CH3COOH)

impurities

-

General description

Phosphoric acid (H3PO4) is also known as orthophosphoric acid. It serves as an intermediary or reagent in various manufacturing processes. Phosphoric acid is found in fertilizers, detergents, and other household cleaning products.
The product is crystalline phosphoric acid.

Application

Phosphoric acid has been employed as an oxidation reagent in a study.1 It may be used in the preparation of ammonium phosphate.
Phosphoric acid is used:
  • As a catalyst in the nucleophilic addition to imines.
  • In the synthesis of porous phosphoric acid-based geopolymers.
  • In the synthesis of mono-alkyl phosphates from simple aliphatic alcohols in the presence of acetic anhydride activator.

Other Notes

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

Caution

product may become solid, becomes liquid on heating to 50°C

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Statements

Hazard Classifications

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

Storage Class Code

8A - Combustible, corrosive hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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