Melting Point Capillary Tubes Borosilicate Glass LBG 3.3

Borosilicate LBG 3.3 glass capillary tubes for melting point determination of solid compounds. Two versions available depending on application: one sealed end (A) and both ends open (B).

Available versions

• Type A — one sealed end: Standard design for loading solid samples. The closed end retains the sample throughout the test.
• Type B — both ends open: Dual-purpose. For melting point determination and sample transfer to thin-layer chromatography (TLC) plates.

Material and construction

• Glass: Borosilicate LBG 3.3
• Chemical resistance: Compatible with common organic and inorganic compounds encountered in synthesis work
• Clarity: Thin walls allow clear visual monitoring of the sample during heating

Typical applications

Organic synthesis, pharmaceutical, and quality control laboratories — used to confirm compound identity and purity by comparison against theoretical melting point values. Type B also used in chromatography for manual sample spotting on TLC plates.

Compatibility

Compatible with standard laboratory hot-block melting point apparatus. Type B tubes are suitable for use with silica and alumina TLC plates.