Perchloric acid
Perchloric acid (CAS 7601-90-3) is a strong oxidizing mineral acid with the chemical formula HClO4. It is a colourless liquid, and it is a powerful acid that is more often encountered in the laboratory than in industry. Perchloric acid is one of the strongest known acids, and it is an important reagent for the digestion of organic materials.
- IUPAC
- PCA

Oxidizing Agent
Perchloric acid is a potent oxidizing agent, particularly when heated. It is used in various chemical analyses and as a strong acid for digestions.
Chemical Synthesis
As a strong acid, it plays a role in certain chemical syntheses where a highly acidic environment is required. Its oxidizing properties can also be harnessed in specific synthetic pathways.
Analytical Chemistry
It is employed in analytical chemistry for digestions of difficult organic matrices prior to elemental analysis and as a titrant in non-aqueous titrations.
Laboratory Reagent
Perchloric acid serves as a general laboratory reagent, used for various experimental procedures requiring a strong, corrosive acid with oxidizing capabilities.
| Molecular weight | 100.46 |
|---|---|
| Linear formula | HClO4 |
| Assay | 70.0-72.0% |
| Grade | ACS reagentpuriss. p.a. |
| Density | 1.664 g/mL at 25 °C |
| Concentration | 0.1 N in acetic acid |
| Vapour pressure | 6.8 mmHg (25 °C) |
| Impurities tested | ≤0.00005% free chlorine (Cl)≤0.0001% heavy metals (as Pb)≤0.001% total nitrogen (N) |


Hazard statements
- H271May cause fire or explosion; strong oxidiser
- H314Causes severe skin burns and eye damage
Precautionary statements
- P220Keep away from clothing and combustible materials
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 113 °C / 235.4 °F |
| Transport (UN / ADR) | UN 1873 8(5.1) / PGI |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | O,C |
| Risk statements (R) | 5-8-35 |
| Safety statements (S) | 23-26-36-45 |
| Anion traces | chlorate (ClO3-): ≤10 mg/kgchloride (Cl-): ≤3 mg/kgphosphate, silicate (as SiO2): ≤5 mg/kgsulfate (SO42-): ≤10 mg/kg |
| Ignition residue | ≤0.003% (as SO4) |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Quality | packed in coated, shock- and leak-protected glass bottle |
|---|---|
| Shelf Life | (limited shelf life) |
| Factor | 1.000 ±0.001 |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Perchloric acid used for?
+
Perchloric acid is primarily used as a strong oxidizing mineral acid for digestions of organic materials in chemical analysis and in certain chemical synthesis applications.
What is the CAS number and formula for Perchloric acid?
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The CAS number for Perchloric acid is 7601-90-3 and its linear formula is HClO₄.
What grade and purity of Perchloric acid does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Perchloric acid with an assay of 70.0-72.0%, meeting ACS reagent and Puriss. p.a. grades.
How is Perchloric acid handled and shipped?
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Perchloric acid is a strong oxidizer and corrosive substance (GHS03, GHS05, Danger, H271-H314). It requires careful handling with appropriate personal protective equipment, including face shields, gloves, and respirators. It is packed in coated, shock- and leak-protected glass bottles and shipped according to UN 1873 regulations (8(5.1) / PGI).
How can I request a sample or quote for Perchloric acid?
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To request a sample or a quote for Perchloric acid, please contact the TSS sales team through our website or by phone.
Is Perchloric acid a controlled substance?
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The provided data does not indicate that Perchloric acid is a controlled substance.
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