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30755

Sigma-Aldrich

Perchloric acid

puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 70.0-72.0%

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Synonym(s):
PCA
Linear Formula:
HClO4
CAS Number:
Molecular Weight:
100.46
MDL number:
PubChem Substance ID:

grade

ACS reagent
puriss. p.a.

Agency

USP/NF
reag. ISO
reag. Ph. Eur.

Assay

70.0-72.0%

form

liquid

impurities

≤0.00005% free chlorine (Cl)
≤0.0001% heavy metals (as Pb)
≤0.001% total nitrogen (N)

ign. residue

≤0.003% (as SO4)

density

1.670 g/cm3

anion traces

chlorate (ClO3-): ≤10 mg/kg
chloride (Cl-): ≤3 mg/kg
phosphate, silicate (as SiO2): ≤5 mg/kg
sulfate (SO42-): ≤10 mg/kg

cation traces

Ag: ≤0.1 mg/kg
Al: ≤0.05 mg/kg
As: ≤0.05 mg/kg
Ba: ≤0.02 mg/kg
Be: ≤0.02 mg/kg
Bi: ≤0.1 mg/kg
Ca: ≤0.5 mg/kg
Cd: ≤0.05 mg/kg
Co: ≤0.05 mg/kg
Cu: ≤0.1 mg/kg
Fe: ≤1 mg/kg
Ge: ≤0.05 mg/kg
K: ≤0.1 mg/kg
Li: ≤0.02 mg/kg
Mg: ≤0.5 mg/kg
Mn: ≤0.02 mg/kg
Mo: ≤0.05 mg/kg
Ni: ≤0.1 mg/kg
Pb: ≤0.05 mg/kg
Sr: ≤0.02 mg/kg
Ti: ≤0.1 mg/kg
Tl: ≤0.05 mg/kg
V: ≤0.05 mg/kg
Zn: ≤0.1 mg/kg
Zr: ≤0.1 mg/kg

SMILES string

OCl(=O)(=O)=O

InChI

1S/ClHO4/c2-1(3,4)5/h(H,2,3,4,5)

InChI key

VLTRZXGMWDSKGL-UHFFFAOYSA-N

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This Item
24425277234311413
Perchloric acid puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 70.0-72.0%

Sigma-Aldrich

30755

Perchloric acid

Essential Grade
Perchloric acid ACS reagent, 70%

Sigma-Aldrich

244252

Perchloric acid

Essential Grade
Perchloric acid puriss. p.a., ACS reagent, packed in coated, shock- and leak-protected glass bottle, ≥60% (T)

Sigma-Aldrich

77234

Perchloric acid

-
Perchloric acid ACS reagent, 60%

Sigma-Aldrich

311413

Perchloric acid

Essential Grade
agency

USP/NF, reag. ISO, reag. Ph. Eur.

agency

-

agency

-

agency

-

assay

70.0-72.0%

assay

70%

assay

-

assay

-

form

liquid

form

liquid

form

liquid

form

liquid

impurities

≤0.00005% free chlorine (Cl), ≤0.0001% heavy metals (as Pb), ≤0.001% total nitrogen (N)

impurities

≤0.001% N compounds, ≤5 ppm Silicate and phosphate (as SIO2)

impurities

≤0.00005% free chlorine (Cl), ≤0.001% total nitrogen (N)

impurities

≤0.001% N compounds, ≤5 ppm Silicate and phosphate (as SIO2)

density

1.670 g/cm3

density

1.664 g/mL at 25 °C

density

1.670 g/cm3

density

1.535 g/mL at 25 °C

General description

Perchloric acid (HClO4) is a strong mineral acid. It has powerful oxidizing and dehydrating properties when it is hot and concentrated. It is commercially available in a concentration of 70% (by weight) in water. Aqueous solution of HClO4 is regarded as a super acid (stronger than sulfuric and nitric acids), but it is not necessarily a powerful oxidizer.

Application

Perchloric acid can be used:      
  • In the synthesis of graphite oxide via electrochemical oxidation of natural graphite.      
  • As a reaction medium in oxidations reactions.     
  • As a dopant in the preparation of perchloric acid-functionalized polyaniline (HClO4/PANI) catalyst for the synthesis of 2-substituted benzothiazoles by condensation reaction between o-aminothiophenol with aldehydes.

It can also be used in the following:      
  • Silica-supported perchloric acid (HClO4-SiO2) is used as a catalyst to synthesize amidoalkyl naphthols by the condensation reaction of 2-naphthol, aromatic aldehydes, and acetonitrile.      
  • HClO4-SiO2 is used in the Friedlander quinoline synthesis by the condensation reaction of 2-aminoaryl ketones and carbonyl compounds.      
  • Alumina-supported perchloric acid (Al2O3-HClO4) is used as a catalyst in the synthesis of α-(α-amidobenzyl)-β-naphthols.

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Ox. Liq. 1 - Skin Corr. 1A - STOT RE 2

Target Organs

Thyroid

Storage Class Code

5.1A - Strongly oxidizing hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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