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.
Sorbent Technologies Inc Activated Alumina Spheres, 1/8in, 3.2mm, 5kg
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, & 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 Dextrin corn commerci2.5KG
DEXTRIN Dextrin corn commerci2.5KG
eMolecules Oakwood Chemical Silicagel 60A 40-63 micron 25kg 761508149 LC4005 0 000 7631-86-9 MFCD00011232 60 083 O2Si
Oakwood Chemical Silicagel 60A 40-63 micron 25kg 761508149 LC4005 0 000 7631-86-9 MFCD00011232 60 083 O2Si
Medchemexpress LLC Corn steep liquor | 66071-94-1 | 100 G
Corn steep liquor is a food-industry by-product supplied as a dried powder that serves as a nutrient-rich supplement for liquid culture media. It provides amino acids, vitamins, and minerals that support fungal mycelial growth and can increase production of secondary metabolites. Manufacturer storage and handling guidance should be followed for best results.
- Used as a nutritional additive for fungal liquid culture media.
- Enhances production of secondary metabolites and mycelial growth.
- Provided as a yellow to brown powder form.
- Available in multiple pack sizes for lab and scale-up use.
- CAS number 66071-94-1 for substance identification.
- Storage: powder -20°C (3 years) or 4°C (2 years); in solvent -80°C (6 months) or -20°C (1 month).
- Shipped at room temperature in continental US; conditions may vary elsewhere.
Immunochemistry Technology Desiccant Packets 10/pk
Desiccant Pack includes ten silica gel desiccant packets (5gm ea.) used to absorb moisture during immunoassay plate storage. Include a desiccant packet with stored ELISA plates to increase stability and shelf-life.
Chem-Impex International, Inc. Drierite, with indicator | 7778-18-9 | MFCD00010912 | 1KG
Drierite, with indicator, 7778-18-9, MFCD00010912, 1KG
Petroleum Analyzer Corporation Kit, Drierite, Indicating, Refill, 10-20 Mesh, 1 lb.
Kit, Drierite, Indicating, Refill, 10-20 Mesh, 1 lb.
Strem, An Ascensus Company CAS# 63231-67-4. 2kg. Silica gel, 70-200 mesh (TLC). MFCD00011232
CAS# 63231-67-4. 2kg. 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/
Research Products International Corp Mini-Desiccant Cartridge, 2 1/2 Inch Diameter, 6 per Package
Useful anywhere desiccation is needed, these cartridges contain inert, non-corrosive and non-toxic silica gel. They fit “Space Saver” desiccators, in addition to other plastic desiccators of similar size.
Clear polypropylene dish allows instant visual inspection of silica gel, which changes in color from blue to pale pink as it absorbs moisture
Highly porous mesh membrane covers the dish providing excellent moisture absorption
Desiccant can be easily regenerated by heating cartridges in a 50ºC (122ºF) oven overnight or at 100ºC (212ºF) for 6 hours
For more rapid drying, remove the membrane lid, transfer the spent gel crystals into a glass or porcelain dish, and place in a 150ºC (300ºF) oven for one hour
Individually foil sealed
Uline Silica Gel Desiccants - Gram Size 5, 5 Gallon Pail
Silica Gel Desiccants - Gram Size 5, 5 Gallon Pail
Cole-Parmer Humidity Sponge, Regenerable; 3" X 3" bags, 40 bags/pk
Humidity sponges meet all drying requirements. One bag will retain 16% moisture in a container with a volume of two gallons (476 cu. in.) The sponges are non-toxic and are Class M3.5 cleanroom-compatible.
Hach Company Desiccant Assembly for SD900
Desiccant assembly for SD900 Sampler includes grease packet