Glass beads, Borosilicate, 1 lb

Product Description

These solid borosilicate spheres can be used as distillation column packing, boiling stones, or to provide support for chromatography columns used in gel filtrations. These beads have excellent chemical resistance and are easier to clean than boiling chips or glass helices. They are packed in plastic 1 lb jars. These are available in 1, 2, 3, 4, 5, or 6 mm diameters. These beads are fairly monodisperse as they are manufactured from cut rods.

Note: the item # suffix and bead size do not correspond to each other (the CG-1101-02 is a 1 mm bead etc.) for historical reasons. The sizes and suffixes given here are correct.

Technical Specifications
Manufacturing process	Cut from rods, blown and pressed
Diameter and sphericity variation	Maximum ±10% of bead diameter
Linear expansion coefficient within range 20 - 300 °C	3.3 ± 0.1 x 10^-6K^-1
Transformation temperatures (DIN 52324)	530 °C
Low degree of cooling	510 °C
High degree of cooling	568 °C
Softening point	815 °C
Processing temperature	1,264 °C
Density	2.23 gm/cm³
Temperature change constant (DIN 52325)	250 °C
Modulus of elasticity	6.3 x 10^-5kp/cm²
Heat conduction at 20 °C	1.00 kcal/(m h °C)
Temperature for 0-108 Ohm-cm	248 °C
Dielectric constant @ 1 MHz and 25 °C	4.6
Dielectric loss angle at @ 1 MHz and 25 °C	55
Point of refraction (He d-line)	1.473 ⁿd
Resistance to water (DIN 12111) in 0.01 N HCl per gram of glass granules	0.026
Resistance to figured as equivalent Na 20/g glass granules	0.008
Hydrolitical Class	1
Resistance to acid (DIN 52322) in mg weight loss per 100 cm²	0.35
Acidity Class	1
Resistance to alkali (DIN 52322) in mg weight loss per 100 cm²	134
Alkaline Class	2