Potassium permanganate

KMnO4

potassium permanganate

CAS7722-64-7
GHS03 Gefahrensymbol: Brandfördernd – Flamme über Kreis
GHS08 Gefahrensymbol: Gesundheitsgefahr – Gesundheitsgefahr
GHS07 Gefahrensymbol: Gesundheitsschädlich/Reizend – Ausrufezeichen
GHS09 Gefahrensymbol: Umweltgefährlich – Umwelt
Danger

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Identification

CAS Number
7722-64-7
EC Number
231-760-3
UN Number
1490
Index Number
025-002-00-9
PubChem CID
516875

Physical-chemical properties

Molecular Formula
KMnO4
Molar Mass
158.03 g/mol
IUPAC Name
potassium permanganate

Chemical Identifiers

InChI
InChI=1S/K.Mn.4O/q+1;;;;;-1
InChI Key
VZJVWSHVAAUDKD-UHFFFAOYSA-N

Overview

Potassium permanganate (CAS 7722-64-7) is an inorganic oxidizing salt with strong antimicrobial and bleaching properties. This distinctive purple crystalline compound serves as one of the most versatile oxidizing agents in industrial applications. With its molecular formula KMnO4 and molar mass of 158.034 g/mol, potassium permanganate demonstrates exceptional chemical reactivity due to the high oxidation state of manganese (+7) in its structure. The compound readily dissolves in water, producing characteristic deep purple solutions that are immediately recognizable in laboratory and industrial settings. From a safety perspective, potassium permanganate requires careful handling as indicated by its hazard classification including Oxidizing Solid Category 2, Reproductive Toxicity Category 2, and Acute Toxicity Category 4. The GHS pictograms GHS03, GHS08, GHS07, and GHS09 reflect its oxidizing nature, health hazards, and environmental concerns. Its ADR classification as Class 5.1 emphasizes the oxidizing properties that make it incompatible with combustible materials and reducing agents. Unlike other oxidizing compounds such as chromium(2+);dioxido(dioxo)chromium, potassium permanganate offers better solubility and more controlled oxidation reactions in aqueous systems. Industrial applications primarily include water treatment for iron and manganese removal, organic synthesis as an oxidizing reagent, and disinfection processes in various industries. The compound also finds use in analytical chemistry for titrations and as a laboratory reagent for organic compound identification. OYSI provides high-quality potassium permanganate to meet diverse industrial requirements across European markets.

Safety & Classification

Danger
Classification:

Ox. Sol. 2; Repr. 2; Acute Tox. 4 *; Aquatic Acute 1; Aquatic Chronic 1

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H272

May intensify fire; oxidiser.

H302

Harmful if swallowed.

H400

Very toxic to aquatic life.

H410

Very toxic to aquatic life with long lasting effects.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Ingestion

Harmful

Measures if substance is accidentally swallowed

First Aid Actions

  • +P301IF SWALLOWED:
  • +P330Rinse mouth.
  • +P331Do NOT induce vomiting.
  • +P310Immediately call a POISON CENTER/doctor.

Related hazard statements:

General Measures

Emergency 112 | Poison Control: +49 30 19240 (DE), +33 1 45 42 59 59 (FR), +31 30 274 88 88 (NL)

First aid measures are based on CLP classification and associated P-statements. They do not replace the Safety Data Sheet (SDS). In case of emergency, always consult the full SDS and a physician.

Transport (ADR)

UN Number1490
ADR Class5.1
Packing GroupII
Tunnel CodeE
Proper Shipping NameKaliumpermanganat
Marine PollutantNo

Frequently Asked Questions

What is potassium permanganate?

Potassium permanganate is an inorganic chemical compound with the formula KMnO4 and CAS number 7722-64-7. This crystalline salt has a molecular weight of 158.034 g/mol and appears as dark purple crystals. It is classified as a strong oxidizing agent (Ox. Sol. 2) with dangerous properties including reproductive toxicity (Repr. 2) and acute toxicity. The substance is widely used in industrial applications due to its powerful oxidizing capabilities and antimicrobial properties.

What are the physicochemical properties of potassium permanganate?

Potassium permanganate is a dark purple to almost black crystalline solid at room temperature. It is highly soluble in water, producing a characteristic intense purple solution. The compound is odorless and has a metallic taste. It readily decomposes when heated, releasing oxygen gas. As a strong oxidizing agent, it can react vigorously with organic materials and reducing agents. The substance is stable under normal conditions but should be kept away from incompatible materials.

What is potassium permanganate used for?

Potassium permanganate is used primarily as a strong oxidizing agent in various industrial processes including water treatment, disinfection, and chemical synthesis. It serves as a bleaching agent for organic materials, a laboratory reagent for analytical chemistry, and an antiseptic in medical applications. The compound is also employed in the production of other manganese compounds, as a deodorizer, and in the treatment of wastewater. Its antimicrobial properties make it valuable for sterilization purposes.

How to handle potassium permanganate safely?

Potassium permanganate must be handled with appropriate personal protective equipment including safety goggles, protective gloves, and protective clothing due to its Danger classification and GHS pictograms (GHS03, GHS07, GHS08, GHS09). Work in well-ventilated areas to avoid inhalation of dust. Prevent contact with skin, eyes, and mucous membranes. Keep away from heat sources, combustible materials, and reducing agents. Use non-sparking tools and ensure proper grounding to prevent static electricity buildup during handling operations.

How to store potassium permanganate correctly?

Potassium permanganate should be stored in a cool, dry, well-ventilated area away from heat sources and direct sunlight. Keep containers tightly closed and separated from incompatible materials such as organic substances, reducing agents, and flammable materials. Store in original containers made of suitable materials. As a Class 5.1 oxidizing substance (Group II), it requires segregation from other hazardous materials according to ADR regulations. Maintain storage areas clean and free from contamination.

What to do in case of contact with potassium permanganate?

In case of skin contact with potassium permanganate, immediately remove contaminated clothing and rinse the affected area thoroughly with plenty of water for at least 15 minutes. For eye contact, flush eyes with clean water for at least 15 minutes and seek immediate medical attention. If inhaled, move the person to fresh air and ensure they rest in a comfortable position for breathing. In case of ingestion, rinse mouth with water and seek immediate medical attention. Never induce vomiting.

How to dispose of potassium permanganate appropriately?

Potassium permanganate waste must be disposed of according to local, national, and international waste regulations as it is classified as hazardous waste. Do not discharge into drains, water bodies, or soil due to its aquatic toxicity (Aquatic Acute 1; Aquatic Chronic 1). Contact licensed waste disposal companies for proper treatment and disposal. Small quantities can be neutralized under controlled conditions by qualified personnel. Always consult safety data sheets and regulatory authorities for specific disposal requirements in your region.

How to transport potassium permanganate?

Potassium permanganate is classified as ADR Class 5.1 (oxidizing substances), Packing Group II, requiring specific transport regulations compliance. Use appropriate packaging materials and marking according to dangerous goods regulations. Vehicles must carry proper documentation, emergency response information, and appropriate safety equipment. Drivers require ADR training certification. Segregate from incompatible materials during transport. Ensure packages are properly labeled with hazard pictograms and transport documentation is complete and accurate.

Is potassium permanganate subject to specific regulations?

Potassium permanganate is subject to various European regulations including REACH registration requirements and CLP classification as a dangerous substance. It carries the signal word 'Danger' with multiple hazard classifications (Ox. Sol. 2; Repr. 2; Acute Tox. 4; Aquatic Acute 1; Aquatic Chronic 1). The substance is not currently listed as SVHC (Substance of Very High Concern). Transport is regulated under ADR as Class 5.1. Users must comply with occupational safety regulations and environmental protection requirements.

Where to buy potassium permanganate in Europe?

Potassium permanganate is available through OYSI, a European distributor of technical chemicals. OYSI provides high-quality potassium permanganate with proper documentation, safety data sheets, and regulatory compliance for industrial and professional applications. As a specialized chemical distributor, OYSI ensures proper handling, packaging, and delivery according to ADR transport regulations. Contact OYSI directly for availability, technical specifications, and procurement information tailored to your specific industrial requirements and applications.

Data Sources

Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.