Perchloric acid
SIGALD/30755 - puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 70.0-72.0%
Synonym: PCA
CAS Number: 7601-90-3
Empirical Formula (Hill Notation): HClO4
Molecular Weight: 100.46
MDL Number: MFCD00011325
Linear Formula: HClO4
Product Type: Chemical
agency | reag. ISO |
reag. Ph. Eur. | |
USP/NF | |
anion traces | chlorate (ClO3-): ≤10 mg/kg |
chloride (Cl-): ≤3 mg/kg | |
phosphate, silicate (as SiO2): ≤5 mg/kg | |
sulfate (SO42-): ≤10 mg/kg | |
assay | 70.0-72.0% |
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 | |
density | 1.670 g/cm3 |
form | liquid |
grade | ACS reagent |
puriss. p.a. | |
ign. residue | ≤0.003% (as SO4) |
impurities | ≤0.00005% free chlorine (Cl) |
≤0.0001% heavy metals (as Pb) | |
≤0.001% total nitrogen (N) | |
InChI | 1S/ClHO4/c2-1(3,4)5/h(H,2 |
InChI key | VLTRZXGMWDSKGL-UHFFFAOYSA |
SMILES string | OCl(=O)(=O)=O |
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-napht |
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. |
Packaging: | 1 L in glass bottle |
Symbol | ![]() ![]() ![]() ![]() |
Signal word | Danger |
Hazard statements | H271 - H290 - H302 - H314 - H373 |
Precautionary statements | P210 - P280 - P301 + P330 + P331 - P303 + P361 + P353 - P305 + P351 + P338 + P310 - P314 |
Hazard Codes | O,C |
Risk Statements | 5-8-22-35 |
Safety Statements | 26-36/37/39-45 |
RIDADR | UN 1873 8(5.1) / PGI |
WGK Germany | WGK 1 |
Flash Point(F) | Not applicable |
Flash Point(C) | Not applicable |
Purity | 70.0-72.0% |
Density | 1.670 g/cm3 |
UNSPSC | 12352106 |