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Inorganic acids

Perchloric acid

Also known as Dioxonium perchlorate solution, Perchloric Acid (60%), Perchloric Acid (70%)

CAS 7601-90-3Formula HClO4Molar mass 100.46 g/molEC 231-512-4
GHS signal word: Danger. Pictograms: Oxidiser, Corrosive 52 suppliers listed
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Perchloric acid chemical structure, HClO4, CAS 7601-90-3
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless, oily liquid
Melting point
-112 °C
Boiling point
19 °C
Density
Relative density (water = 1): 1.76 (22 °C)
Solubility
MISCIBLE IN COLD WATER
HS code
281119
Category
Inorganic acids
UN number
UN 1873
Illustrative photo, an amber glass solvent bottle with clear liquid on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Perchloric acid?

Plain description, key identifiers and synonyms

Perchloric acid is a chlorine oxoacid. It is a conjugate acid of a perchlorate.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
perchloric acid
CAS number
7601-90-3 CAS number cross-checked
EC number
231-512-4
Molecular formula
HClO4
UNII
V561V90BG2
MDL number
MFCD00011325, MFCD00012671
InChIKey
VLTRZXGMWDSKGL-UHFFFAOYSA-N
InChI
InChI=1S/ClHO4/c2-1(3,4)5/h(H,2,3,4,5)
SMILES (canonical and isomeric)
OCl(=O)(=O)=O

Synonyms

  • Dioxonium perchlorate solution
  • Perchloric Acid (60%)
  • Perchloric Acid (70%)
  • Perchloric acid, >72% acid by mass [Forbidden]
  • Perchloric acid, >72% acid by mass
  • 0.5N Perchloric Acid
  • Perchloric acid, not >50% acid, by mass
  • Perchloric acid, >50% but not >72% acid, by mass
  • Perchloric acid, ACS reagent, 70%
  • ClHO4
  • Perchlorsaeure
  • perchioric acid
  • Perchloric acid (8CI, 9CI, ACI), Perchloric acid (HClO4)
  • Ueberchlorsaeure
  • LCP
  • HClO4
  • hydroxidotrioxidochlorine
  • 0.1M Perchloric acid in acetic anhydride
  • Perchloric acid, 0.1 M
  • [ClO3(OH)]
  • 7601-90-3(acetic acid)
  • Perchloric acid (hclo4)
  • Perchloric acid, AR, >=70%
  • Perchloric acid standard solution
  • Perchloric acid, JIS special grade
Show all 35 synonyms
  • Perchloric acid, 70%, ACS reagent
  • Perchloric acid, ACS reagent, 60%
  • Perchloric acid, not >50% acid, by mass [UN1802] [Corrosive, Oxidizer]
  • Perchloric acid, puriss. p.a., 20%
  • UN 1802
  • Perchloric acid, >50% but not >72% acid, by mass [UN1873] [Oxidizer, Corrosive]
  • Perchloric acid, 1N aqueous standardiZed solution
  • Perchloric acid, SAJ first grade, 60.0-62.0%
  • Perchloric acid, JIS special grade, 60.0-62.0%
  • Perchloric acid, 70%, 99.999% trace metals basis

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Colorless, oily liquidexp.
Odour
Odorlessexp.
Melting point
-112 °Cexp.
Boiling point
19 °Cexp.
Density
Relative density (water = 1): 1.76 (22 °C)exp.
Solubility
MISCIBLE IN COLD WATERexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
100.46 g/molcalc.
Exact mass
99.9563 Dacalc.
LogP (octanol/water)
-4.12calc.
Topological polar surface area
89.41 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
0calc.
Heavy atoms
5calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS03: Oxidiser
Oxidiser
GHS05: Corrosive
Corrosive

Hazard statements

  • H271May cause fire or explosion, strong oxidiser.
  • H314Causes severe skin burns and eye damage.
Precautionary statements (19)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P220Keep away from clothing and other combustible materials.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P283Wear fire resistant or flame retardant clothing.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P306 + P360If on clothing: Rinse immediately contaminated clothing and skin with plenty of water before removing clothes.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P371 + P380 + P375In case of major fire and large quantities: Evacuate area. Fight fire remotely due to the risk of explosion.
  • P405Store locked up.
  • P420Store separately.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 1873
Transport hazard class
5.1
Packing group
I

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Perchloric acid suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 52 suppliers
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Where suppliers are based

52 suppliers in 18 countries

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Perchloric acid price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

In analytical chemistry as an oxidizer & for separation of potassium from sodium.

Explosives & for plating of metals (perchlorate salts).

Titration reagent in determination of 1h-benzotriazole in air.

Catalyst, manufacture of various esters, ingredient of electrolytic bath in deposition of lead.

How it is made

From potassium perchlorate & sulfuric acid: handbook of preparative inorganic chemistry vol 1, g brauer, ed (academic press, new york, 2nd ed, 1963) pages 318-320. Comprehensive monograph: jc schumacher, perchlorates (reinhold, new york, 1960).

Chemical reaction of sodium perchlorate and hydrochloric acid, direct electrolytic oxidation of cold (18 °C), very dilute (0.5N) hydrochloric acid, irradiating aqueous solutions of chlorine dioxide, passing ozonized air through a solution of hydrochloric acid or sodium hypochloride, electrodialysis of perchlorate salts using ion-selective membranes

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 017-006-00-4

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Perchloric acid is traded under.

HS 2811.19Indicative HS code

Inorganic acids, other than hydrogen fluoride

World exports in 2024
$494M
+6.5% vs 2023, imports $458M
2019 to 2024
Top exporters
  1. China24.9%
  2. Israel16.0%
  3. Jordan * partner reported11.7%
Top importers
  1. China29.3%
  2. United States16.2%
  3. Germany7.0%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Perchloric acid is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Perchloric acid, based on the data on this page

What is Perchloric acid?

Perchloric acid is a chlorine oxoacid. It is a conjugate acid of a perchlorate.

What is the CAS number of Perchloric acid?

The CAS registry number of Perchloric acid is 7601-90-3.

What is the molecular formula and weight of Perchloric acid?

The molecular formula of Perchloric acid is HClO4 and its molar mass is 100.46 g/mol.

What is Perchloric acid used for?

In analytical chemistry as an oxidizer & for separation of potassium from sodium. Explosives & for plating of metals (perchlorate salts). Titration reagent in determination of 1h-benzotriazole in air. Catalyst, manufacture of various esters, ingredient of electrolytic bath in deposition of lead.

Is Perchloric acid hazardous?

Perchloric acid carries the GHS signal word "Danger". Main hazards: may cause fire or explosion, strong oxidiser, causes severe skin burns and eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Perchloric acid?

Perchloric acid is usually classified under HS code 281119 (II. INORGANIC ACIDS AND INORGANIC OXYGEN COMPOUNDS OF NON-METALS, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Perchloric acid?

CompoundList lists 52 suppliers of Perchloric acid in India, China, United States, United Kingdom and 14 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Perchloric acid in India?

13 suppliers in India list Perchloric acid on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Perchloric acid?

Suppliers quote Perchloric acid on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Perchloric acid

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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