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potassium permanganate

Also known as: POTASSIUM PERMANGANATE · 7722-64-7 · Chameleon mineral · Condy's crystals

CAS No.: 7722-64-7
Formula: KMnO4
Molar mass: 158.034 g/mol
PubChem CID: 516875

GHS pictograms

Oxidizing

Corrosive

Harmful / Irritant

Health hazard

Environmental hazard

2D structure of potassium permanganate — 2D structure · PubChem CID 516875

Summary

potassium permanganate (KMnO4), CAS 7722-64-7. Common in labs and industry. Read on for hazards, storage, PPE and mixing rules.

Background

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Hazards

Oxidizing (GHS03)

May cause or intensify fire.

Corrosive (GHS05)

Attacks skin, eyes and materials.

Harmful / Irritant (GHS07)

May cause skin, eye or respiratory irritation.

Health hazard (GHS08)

Serious long-term health effects (CMR, respiratory sensitizer).

Environmental hazard (GHS09)

Toxic to aquatic organisms.

Hazard statements

H272: May intensify fire
H302: Harmful if swallowed [Warning Acute toxicity, oral]
H361: Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]
H400: Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
H410: Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]
H314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]
H373
H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure
H341: Suspected of causing genetic defects [Warning Germ cell mutagenicity]
H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]

Storage

Temperature

Keep at room temperature, below 30 °C, out of direct heat.

Ventilation

Store somewhere well-ventilated and away from any ignition source.

Containers

Metal drums or tinted glass, tightly sealed.

Keep away from

Strong acids, strong bases and powerful oxidizers.

Personal protective equipment

Gloves

Nitrile or butyl, at least 0.4 mm thick.

Eye protection

Safety goggles with side shields.

Respirator

A2 organic-vapor cartridge if the room isn't well ventilated.

Occupational exposure limits (HSE)

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EU harmonised classification (ECHA C&L)

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Transport

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FDA recalls & enforcement

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Compatibilities

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Practical safety notes

Oxidizing. Keep away from combustibles, organics, reducers and fuels.
Corrosive. Wear chemical goggles, faceshield and chemical-resistant gloves. Have an eyewash within reach.
Irritant / harmful. Ventilate the workspace and avoid skin contact.
Serious health hazard (carcinogen, mutagen, reprotoxic, respiratory sensitizer). Substitute if possible; otherwise closed systems and medical surveillance.
Environmental hazard. Do not release to sewers or waterways; collect for hazardous waste disposal.

Derived from the GHS classification shown above. These notes are generic guidance and do not replace the manufacturer's SDS or your local risk assessment.

FAQ

Is potassium permanganate flammable?+

potassium permanganate (CAS 7722-64-7) does not carry the GHS02 flame pictogram in our records. Always confirm with the manufacturer's SDS section 9 (flash point) before assuming a product is non-flammable.

What PPE should I wear when handling potassium permanganate?+

Chemical-splash goggles and a faceshield, chemical-resistant gloves (nitrile or butyl) and an apron are the minimum. Work inside a fume hood or use a suitable respirator. Check SDS section 8 for material-specific breakthrough times.

How should potassium permanganate be stored?+

Store potassium permanganate (CAS 7722-64-7) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials. Segregate acids from bases and keep away from metals that can be attacked.

Is potassium permanganate dangerous for the environment?+

Yes. potassium permanganate carries the GHS09 environment pictogram. Do not release to drains, soil or waterways; collect residues for hazardous-waste disposal in line with local regulations.

Where can I find the official Safety Data Sheet for potassium permanganate?+

Official, up-to-date SDS documents are published by each manufacturer (Sigma-Aldrich, Merck, Thermo Fisher, VWR, Carl Roth, etc.) and by regulators such as ECHA and NIOSH. This page is an educational summary and does not replace the manufacturer's SDS.

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