Lab Desiccants and Drying Agents
Hygroscopic substances and drying agents for use in laboratory settings; drying agents are commonly used to keep other substances and samples dry, or to prevent moisture from forming on/in containers. Products include drying tubes, kits, etc.
Desiccants are typically chemicals or compounds that are hydroscopic (readily absorb moisture). Common desiccants include clays, silica gels, and calcium sulfate.
In the lab, desiccants are commonly used in desiccators and desiccator cabinets, with in-line air and gas drying columns, in absorption bulbs, U-tubes, glove boxes, sealed chambers, and wherever a dry environment is required. They are also used during transport, for storage, and maintaining materials and products ─ everything from clothing to electronics.
The moisture may come from a variety of sources:
- Water vapor in the air
- Moisture in packaging materials
- Moisture from permeation or leakage
Some desiccants contain an indicator or additive that produces a color change with moisture absorption. The indicator allows the user to see when the desiccant has absorbed its maximum amount of moisture and needs to be replaced or regenerated.
Some desiccants can be reused many times simply by heating them in an oven to allow moisture to evaporate. For indicating desiccants, one can also easily tell when the desiccant is again ready to use by the change back to the original color.
Desiccants may be available in a range of mesh or particle sizes. The Tyler Equivalent is a common type of mesh sizing and indicates the number of openings per linear inch of mesh. Common desiccant mesh sizes are 4, 8, and 10 to 12. Size 4 is typically used in gas phase applications; they are larger and less likely to break. Size 8 is smaller and can be more tightly packed.
Electron Microscopy Sciences Silica Gel Bulk Desiccant, 2 Lbs
Changes color when it reaches max absorption capacity.
Electron Microscopy Sciences Silica Gel Canister, 500 per pack
This small container offers more desiccant in less space. It is ship-proof and possesses greater drying capabilities. Designed for use in bottles and small containers. Perfect for protecting against potency loss, odor formation, color changes, caking, mildew and condensation. Capsule shell is made from polyethylene with very fine mesh top and bottom. The canister contains 1 gram silica gel.
Electron Microscopy Sciences Desiccant Canister
Ideal for dry control of desiccator cabinets. Moisture is absorbed through the perforations in the aluminum case, which contains silica gel. This 2 x 4" canister maintains a safe level of humidity in 3cu.ft (0.8 cu. meter) area. When the monitor window turns pink, the silica gel is saturated. It can be regenerated in a 300 degree F (150 degree C) oven in about 3 hours. The monitor window will be blue in color when recharged.
Strem, An Ascensus Company CAS# 63231-67-4. 500g. Silica gel, 70-200 mesh (TLC). MFCD00011232
CAS# 63231-67-4. 500g. Silica gel, 70-200 mesh (TLC). MFCD00011232. Molecular Weight: 78.10. Molecular Formula: H2SiO3. Color/form: white pwdr. Strem# 93-1427. http://www.strem.com/catalog/v/93-1427/
Waters Corp Regenerated Cellulose Membrane, Short Channel, 2 kDa MWCO, Pack of 5
This regenerated cellulose membrane is designed for use with short channels. It features a 2 kDa molecular weight cut-off and is supplied in a pack of 5, offering compatibility with various accessories.
- Regenerated cellulose membrane
- For short channel
- 2 kDa MWCO
- Pack of 5
- Compatible with accessories
Pfaltz & Bauer Drierite @ 8 Mesh With Indicat| 1 lb| 7778-18-9
Drierite @ 8 Mesh With Indicat| 1 lb| 7778-18-9
Sorbent Technologies Inc Activated Alumina Spheres, 7x14 Mesh, 2.0mm, 1kg
The activated alumina spheres are very porous, have a high surface area, and do not change form. They will not soften or disintegrate when immersed in liquids. When used to adsorb water, they act as an efficient desiccant. Molecules with the highest polarity are preferentially adsorbed. In the absence of irreversible fowling, they may be regenerated by heating to a temperature between 177-316C. Applications: Drying and purification of organic liquids and gases; adsorption of heavy metals such as fluorides, phosphates, arsenic acids, and humic acids; purification of processing liquids, industrial water, and waste water by removing highly polar compounds such as: TBC, alcohols, ethers, etc.; removal of acids formed from the degradation of transformer oils, lubricating oils, and refrigerants; removal of residual halides and water during the manufacture of chlorinated and/or fluorinated hydrocarbons, yielding a non-corrosive product.
Sigma Aldrich Fine Chemicals Biosciences Florisil(R) 100-200 mesh | 1343-88-0 | MFCD00078249 | 1KG
Florisil(R) 100-200 mesh | Mol Wt: 100.39 | 1343-88-0 | MFCD00078249 | 1KG
Sigma Aldrich Fine Chemicals Biosciences Phosphorus pentoxide | 1314-56-3 | MFCD00011440 | 100 g
Phosphorus pentoxide | Mol Wt: 141.94 | 1314-56-3 | MFCD00011440 | 100 g
Sigma Aldrich Fine Chemicals Biosciences Drierite™ | 7778-18-9 | MFCD00010912 | 2.3kg
Drierite™ | with indicator, 10-20 mesh | MW:136.14 | 7778-18-9 | MFCD00010912 | 2.3kg
Sigma Aldrich Fine Chemicals Biosciences Corn oil US Pha200mg
This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product including SDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia.for further information and support please go to the website of the issuing Pharmacopoeia.