30755

Perchloric acid

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

• Synonym(s): PCA
• Linear Formula: HClO₄
• CAS Number: 7601-90-3
• Molecular Weight: 100.46
• MDL number: MFCD00011325
• UNSPSC Code: 12352106
• PubChem Substance ID: 329753578

Properties

• 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 (SO₄^2-): ≤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

Description

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.

Safety Information

• Pictograms: GHS03,GHS08,GHS05,GHS07
• Signal Word: Danger
• Hazard Statements: H271,H290,H302,H314,H373
• Precautionary Statements: P210 - P280 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338 - P314
• 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