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Perchloric Acid

An inorganic compound, HClO4, 100.457 g/mol. Boiling point 19 °C @ 11 MM HG, melting point -112 °C, as published.

verified record, Inorganic compound, 5 measured properties

Identifiers

Molecular formula
HClO₄
Molecular weight
100.457 g/mol
Exact mass
99.956336 g/mol
IUPAC name
perchloric acid
SMILES
[O-][Cl+3]([O-])([O-])O
InChI
InChI=1S/ClHO4/c2-1(3,4)5/h(H,2,3,4,5)
InChIKey
VLTRZXGMWDSKGL-UHFFFAOYSA-N
Open in ReactionLensUse in reaction prediction

Measured properties

Published measurements, each with its source. Two readings of one property are both shown, in the units each used.

Boiling Point
19 °C @ 11 MM HGmeasured · The Merck Index. 10th ed. Rahway, New Jersey: Merck Co., Inc., 1983., p. 1028
Melting Point
-170 °F (USCG, 1999)measured · U.S. Coast Guard. 1999. Chemical Hazard Response Information System (CHRIS) - Hazardous Chemical Data. Commandant Instruction 16465.12C. Washington, D.C.: U.S. Government Printing Office.
-112 °Cmeasured · The Merck Index. 10th ed. Rahway, New Jersey: Merck Co., Inc., 1983., p. 1028
-112 °Cmeasured · reference compound database
-112 °Cmeasured · reference compound database
Solubility
MISCIBLE IN COLD WATERmeasured · Weast, R.C. (ed.). Handbook of Chemistry and Physics. 64th ed. Boca Raton, Florida: CRC Press Inc., 1983-84., p. B-84
Solubility in water: misciblemeasured · reference compound database
Density
1.6 to 1.7 at 77 °F (USCG, 1999)measured · U.S. Coast Guard. 1999. Chemical Hazard Response Information System (CHRIS) - Hazardous Chemical Data. Commandant Instruction 16465.12C. Washington, D.C.: U.S. Government Printing Office.
1.768 @ 22 °Cmeasured · The Merck Index. 10th ed. Rahway, New Jersey: Merck Co., Inc., 1983., p. 1028
VERY HYGROSCOPIC; COMBINES VIGOROUSLY WITH WATER WITH EVOLUTION OF HEAT; AQ ACID IS VERY CAUSTIC; DECOMP WHEN DISTILLED @ ATMOSPHERIC PRESSURE; DENSITY OF AQ SOLN @ 25 °C: 65.0%= 1.597; 70.0%= 1.664; 75.0%= 1.731; DENSITY OF AQ SOLN @ 15 °C: 1%= 1.0050; 10%= 1.0597; 20%= 1.1279; 30%= 1.2067; 40%= 1.2991; 50%= 1.4103; 60%= 1.5389; 70%= 1.6736measured · The Merck Index. 10th ed. Rahway, New Jersey: Merck Co., Inc., 1983., p. 1028
Relative density (water = 1): 1.76 (22 °C)measured · reference compound database
1.77 @25 °Cmeasured · reference compound database
Vapor Pressure
6.8 [mmHg]measured · reference compound database

Calculated properties

Derived from the structure, not from a sample; kept apart from the measurements above.

Molecular weight
100.46 g/molcalculated · reference compound database
Average mass of one molecule, from reference compound database.
Exact mass
99.9563362 Dacalculated · reference compound database
Mass of the most common isotopic form.
XLogP3
2.3calculated · reference compound database
Estimated oil/water partition, computed by reference compound database.
Polar surface area
71.4 Ųcalculated · reference compound database
Polar surface area as computed by reference compound database.
Complexity
114calculated · reference compound database
A rough measure of how intricate the structure is.
H-bond donors
1calculated · reference compound database
H-bond acceptors
4calculated · reference compound database
logP
-4.124calculated · chemistry engine
Estimated preference for oil over water. Higher means more oil-like.
Topological polar surface area
89.41 Ųcalculated · chemistry engine
Surface area from polar atoms; relates to how easily a molecule crosses membranes.
H-bond donors
1calculated · chemistry engine
Atoms that can donate a hydrogen bond.
H-bond acceptors
4calculated · chemistry engine
Atoms that can accept a hydrogen bond.
Rotatable bonds
0calculated · chemistry engine
Single bonds the molecule can freely twist around.
Molar refractivity
2.2188 cm³/molcalculated · chemistry engine
Relates to the molecule's polarisability.
Fraction sp³ carbons
0calculated · chemistry engine
Share of carbon atoms with tetrahedral bonding.
QED drug-likeness
0.3349calculated · chemistry engine
Quantitative estimate of drug-likeness (0–1).

What it is made of

Elements

Percentages are of the molecular weight above, worked out the same way the molar mass calculator does it.

Structure

Heavy atoms, hydrogen excluded
5
Total atoms, hydrogen included
6
Rings
0
Aromatic rings
0
Stereocentres
0
Formal charge
0

The molecule in three dimensions

Rotate and inspect the atoms. Loaded only when you ask, so the page stays light.

The drawing above is a diagram of what is bonded to what. A molecule is not flat, and the model here is one low-energy shape generated from the connectivity — useful for seeing which groups can reach each other, and not a measured structure. A real sample is a population of conformations, interconverting.

Reactions it appears in

No documented reaction with a written procedure and a source involves Perchloric Acid yet.

Other names for it

The systematic name on this record is perchloric acid.

The sources also call it V561V90BG2, CHEBI:29221, DTXSID8047004, RefChem:6111, Dioxonium perchlorate solution, DTXCID6027004, HSDB 1140, EINECS 231-512-4, UN1802, UNII-V561V90BG2, MFCD00011325.

Structurally related

Nothing structurally close to Perchloric Acid has a page here yet.

Seen alongside it in reaction records

Molecules that appear in the same recorded reactions as Perchloric Acid. This says nothing about structure: most of them are the bases, solvents, ligands and catalysts the chemistry needed, and they are here because somebody put them in the same flask.

1,4-Dioxane

used as a reactant

C₄H₈O₂, 88.106 g/mol.

(17-acetyl-10,13-dimethyl-2,3,4,5,6,7,8,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl) acetate

used as a reactant

C₂₃H₃₄O₃, 358.522 g/mol.

1,2,4-Butanetriol

used as a reactant

C₄H₁₀O₃, 106.121 g/mol.

Where these values came from

compound record.

What this page does not claim

Identifiers are copied from the source record, measured values are reported as published, and calculated values are marked as calculated. Nothing here is a hazard, purity or handling assessment — how the library is checked.

Where to next

More molecules under P

The rest of this shelf, a hundred names at a time.

Molar mass calculator

Work with HClO4 in a calculation, with every element's contribution shown.

Molarity calculator

Grams of Perchloric Acid for a volume and a concentration, or the concentration a mass gives.

Open in ReactionLens

The full record in the workstation: every atom, every bond, and the reactions it appears in.