Cometek Porcelain Crucible with Lid | Pack of 2 Crucibles & 2 Lids | 50 ml | Heat Resistant Crucible for Laboratory

• Liquid Chamber Volume: 50 ml per Crucible

Features

• High-Purity Porcelain Matrix: Manufactured from high-grade ceramic clay materials that exhibit high mechanical strength and absolute resistance to volatile corrosive acids and alkalis.
• Smooth Chemical Glazing: The interior walls are glazed to a mirror-smooth finish, eliminating microscopic pores that could catch or trap trace sample remnants.
• Loose Flange Lid Integration: The lids feature a specialized outer flange drop that anchors onto the crucible lip, ensuring safe moisture venting without slipping off.
• Flat Ground Base Substrate: The bottom base lacks glazing and is precision ground flat to maximize surface-to-surface heat transfer from wire gauzes, clay pipe triangles, or hot plates.
• Ergonomic Top Lid Loops: Outfitted with an elevated ceramic top ring loop, making it easy to grip and move using standard laboratory crucible tongs while glowing hot.

Applications

• Gravimetric Ashing Determinations: Provides quantitative analytical labs with a stable, contamination-free cup to burn organic food, soil, or polymer polymers down to ash.
• High-Heat Chemical Reductions: Ideal for heating copper carbonate, magnesium ribbons, or sulfur powders to induce thermal decompositions or oxidation changes.
• Academic Quantitative Labs: Acts as a fundamental, highly resilient training vessel for high school and college students exploring empirical formula derivations.
• Moisture Content Loss Analysis: Used by agricultural and environmental research labs to measure mass differences by boiling off bound water from geological substrates.