Boiling Stones

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Hengar Boiling Stones

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Attention Thomas Scientific Customers

Due to current pandemic, lead times for PPE items are longer than what is listed on our website. Please expect shipping delays of all PPE products during this time.

  • High purity, white, amphoteric alundum granule. Extremely hard porous surface. Will not crumble or "powder". Four mesh granule size. Specific gravity 3.97. 5 year industry leading warranty In any laboratory procedure involving the boiling of a liquid, inert and insoluble,…

  • High purity, white amphoteric alundum granule. Extremely hard porous surface. Will not crumble or "powder". Ten mesh granule size. Specific 3.97. 5 year industry leading warranty In any laboratory procedure involving the boiling of a liquid, inert and insoluble, Hengar Granules…

  • Hard, bluish black, iridescent silicon carbide granule. No reduction characteristics. Oxidizes slowly at 800°C (1472°F). Twelve mesh granule size. Specific gravity 3.20. 5 year industry leading warranty In any laboratory procedure involving the boiling of a liquid, inert and…

  • High purity, amphoteric alundum, specially treated with selenium for use in determination of amino and cyanide nitrogen. Four mesh granule size, iridescent bluish black color. Selenium as a solid is relatively nontoxic. Its vapor or fumes are highly toxic. TLV 0.2 mg/cubic meter. Specific gravity…

  • High purity, amphoteric alundum, specially treated with selenium for use in determination of amino and cyanide nitrogen. Ten mesh granule size, iridescent bluish black color. Specific gravity 4.10. Selenium as a solid is relatively nontoxic. Its vapor or fumes are highly toxic. 5 year industry…

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