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flame test
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flame test

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Metals heated in the flame of a Bunsen burner burn with characteristic coloured flames. This is because when heated the electrons in the metal move around and give off light. Flame tests are useful for identifying unknown metals.

In chemistry, the use of a flame to identify metal cations present in a solid.

A nichrome or platinum wire is moistened with acid, dipped in a compound of the element, either powdered or in solution, and then held in a hot non-luminous flame. The colour produced in the flame is characteristic of metals present; for example, sodium burns with an orange-yellow flame, and potassium with a lilac one.
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Properties include low specific gravity; no degradation of physical properties of base polymer; long-term thermal and uv protection; non-yellowing and non-blooming; no heavy metals; no forming of dioxins when heated or incinerated; passing UL, MVSS-302 and NFPA flame tests when properly formulated.
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On its own, it is rated UL 94V-0, and composites made with it reportedly can easily pass E162, E662, and BSS 7239 flame tests.
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