Friday, 8 July 2011

Potassium Chlorate - KClO3 - 99.9 % - 100 g

Chemical formula: KClO3

Synonyms: chlorate of potassium

Amount: 100 g

Appearance and odour: white crystals without appreciable odour.

Grade: 99.88 %

Packaging: professional wide necked, white HDPE bottle with blue conical seal cap and tamper ring. Labeled. Bottle and cap are UN approved and reusable.

Description and uses: one of the most commonly used strong oxidisers, mainly for non-aqueous use. As such it finds extensive use in pyrotechnical applications, including solid rocket motors. It's a little less powerful than potassium perchlorate but safer to use.

With magnesium it forms a powerful flash powder. Ignite from a safe distance...

With aluminium powder it burns very hotly (probably over 3,000 centigrade) once ignited, usually with a magnesium ribbon or a blow torch, but in a very contained manner, producing (vapourised) KCl and molten alumina (Al2O3). For extra heat a little sulphur can be added but reportedly mixtures of KClO3, aluminium powder and sulphur (powder) are pressure sensitive and can flash. Due to high burn temperature, straight KClO3-Al powder mixes (stable enough to keep without any problems or special precautions) are a common method of igniting Thermite (Goldschmidt) reactions.

In some Thermite (Goldschmidt) reactions where extremely high end-temperatures are required (Niobium, Vanadium, Chromium, Titanium, special alloys) a certain amount of a stoichiometric mix of KClO3 and Al powder is added to the target oxide-Al powder mixture to boost heat output significantly and increase the yield of the high melting target metal.

KClO3 is also a handy laboratory source of small amounts of pure oxygen (O2): gently heated in a glass retort, the potassium chlorate releases its chemically bound oxygen, leaving behind potassium chloride (KCl).

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CAS: 3811-04-9

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