2.5 mm Quartz Capillary - 15/pk

- Thin walled - 10 micron
- Quartz Glass 0620

Crystal Clear Quartz capillaries that are extremely thin walled (approximately 10 micron wall thickness). The length of the capillary has a well defined diameter, with one end having a funnel shape and the other end closed. Quartz capillaries have a wall thickness of 0.01 mm and an overall length of 80 mm +/-5 mm. Quartz capillaries are available in a wide range of outside diameters from 0.1 mm to 5.0 mm. They are designed to mount, hold, and store small molecule and biological macromolecular crystals for x-ray data collection. Capillaries can also be used for crystal density measurements and crystal growth experiments. The capillaries can be sealed tightly against moisture and gases using wax, epoxy, or other sealing materials.

In determining what glass or quartz capillary is right for you, please refer to the “Linear Absorption Coefficient µ cm-1” table. This table indicates the amount of radiation that is absorbed by the capillary during x-ray data collection.

For 0.1 mm to 2.5 mm capillaries the open end capillary tube base size is 3.0 +/- 0.2 mm OD x 0.2 +/- 0.15 mm Wall thickness. For 3.0 and 3.5 mm capillaries the open end capillary base size is about 4.4 mm OD x 0.25 mm Wall thickness. For 4.0 and 5.0 mm capillaries the open end capillary based size is about 6.0 x 0.25 mm.

The Diameter is measured about 30 to 40 mm from the closed end (measuring instrument: LaserMicrometer LS 7500) The tolerances are as follows.

Diameter Tolerance Minimum Diameter Maximum Diameter
0.1 mm +/-0.05 mm 0.05 mm 0.15 mm
0.2 mm +/-0.05 mm 0.15 mm 0.25 mm
0.3 mm +/-0.05 mm 0.25 mm 0.35 mm
0.4 mm +/-0.05 mm 0.35 mm 0.45 mm
0.5 mm +/-0.05 mm 0.45 mm 0.55 mm
0.6 mm +/-0.05 mm 0.55 mm 0.65 mm
0.7 mm +/-0.05 mm 0.65 mm 0.75 mm
0.8 mm +/-0.05 mm 0.75 mm 0.85 mm
0.9 mm +/-0.05 mm 0.85 mm 0.95 mm
1.0 mm -0.05 +0.25 mm 0.95 mm 1.25 mm
1.5 mm +/-0.25 mm 1.25 mm 1.75 mm
2.0 mm +/-0.25 mm 1.75 mm 2.25 mm
2.5 mm +/-0.05 mm 2.25 mm 2.55 mm
3.0 mm +/-0.25 mm 2.75 mm 3.25 mm
3.5 mm +/-0.25 mm 3.25 mm 3.75 mm
4.0 mm +/-0.25 mm 3.75 mm 4.25 mm
5.0 mm +/-0.25 mm 4.75 mm 5.25 mm


Quartz Specifications
Glass type Fused silica / quartz glass
Density 2.2 g/cm3
Transformation temperature Tg= 1075 - 1210 degrees Celsius
Strain point approximately 1075 degrees Celsius
Annealing point approximately 1180 degrees Celsius
Softening point approximately 1730 degrees Celsius
Working point 1700 - 2100 degrees Celsius
Refractive index 1.46 589.3nm
Mohs hardness 5.5 - 6.5
Hydrolytic resistance, class 1 (DIN 12 111)
Acid resistance, class 1 (DIN 12 116)
Alkalai resistance, class 1 (DIN 52 322)
Chemical composition SiO2 99.99%
Trace elements
Al 16.00 ppm
Ca 0.80 ppm
Fe 0.80 ppm
K 0.90 ppm
Li 0.70 ppm
Na 0.90 ppm
Ti 1.50 ppm
Mg 0.10 ppm
Cu <0.05 ppm
Cr <0.05 ppm


Capillaries have only been tested at atmospheric pressure (760 mmHg (torr), 29.92 inHg, 14.696 psi). Use at other pressures has not been tested.

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