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.
Research Products International Corp Humidity Sponges, Regenerable, 40 per Case
Humidity Sponges are ideal for providing dry conditions in laboratory applications. Humidity Sponges have a high moisture absorbency of up to 37% and one bag will maintain dry conditions inside a container with a two gallon volume.
The non-toxic desiccant is enclosed within a breathable polyethylene bag. Indicating material changes color to signal when full moisture capacity has been reached.
Electron Microscopy Sciences Silica Gel Packets 10 Gram, 2¾" x 3", 91.5 cubic inch Capacity
Silica Gel-Desiccant is a fast and extra moisture absorbing agent. Meets FDA specifications for food and drug product. Provides superior absorption. Remains dry at maximum saturation. Silica gel can absorb 15% of its weight in water vapor in two hours.
Dimensions: 2¾" x 3"
Capacity: 91.5 cubic inch
Medchemexpress LLC Netrin receptor DCC/ 5ug | 5ug
The netrin receptor DCC guides axonal attraction in neuronal growth cones during nervous system development Interaction with UNC5 protein induces axonal repulsion Netrin receptor DCC/DCC Protein Human (HEK293 His) is the recombinant human-derived Netrin receptor DCC/DCC protein expressed by HEK293 with C-10 His labeled tag
Perkin Elmer US LLC Reusable Dessicant Kit - Qty. 4
FT-IR spectrometers require dessicant kits to keep their optical paths moisture-free. PerkinElmer recommends that your instrument's desiccant be replaced every six months. Your spectrometer's manual has instructions on how to install the dessicant. Depending on the spectrometer, you will need two to three dessicant kits every six months.
Uline OXYGEN ABSORBING PACKTS 2000/C
Oxygen-Absorbing Packets - 300 ccPreserve freshness and extend the shelf life of packaged foods.Prevents mold and bacteria growth.Removes over 99.9% of oxygen from sealed, airtight packages.PROTECTS 100 CU. IN.FDA compliant.
Sorbent Technologies Inc Silica Gel Desiccant Spheres w/100% Blue Indicator, 1-3mm 1kg
Silica Gel Desiccant Spheres with 100% blue indicator are non-corrosive, non-toxic, and chemically inert. The desiccant spheres have particle distribution of 1-3mm and a quantity of 1kg. It is a highly porous form of silica, with an extremely large internal surface area and an affinity towards water and other polar compounds. It will not change its size or shape. Even when the silica gel is water saturated, it remains free-flowing. The spheres with blue indicator (cobalt chloride) turn pink upon reaching moisture capacity.
Sigma Aldrich Fine Chemicals Biosciences Drierite(TM) with indicator, 10-20 mesh | 7778-18-9 | MFCD00010912 | 454G
Drierite(TM) with indicator, 10-20 mesh | Mol Wt: 136.14 | 7778-18-9 | MFCD00010912 | 454G
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.
Forcoven Products Inc 50 BAGS/CS ATTAPULGUS 150G/BAG
Attapulgus Clay, 50/Bags, Each Bag Is 150 Grams (100 On The Bottom And 50 On The Top)
Gilson Company Inc Indicating Drierite, No. 4 Granules, 5 lb
Indicating Drierite is used to rapidly absorb water vapor from air and gases. Made from cobalt chloride impregnated granules, the blue Drierite crystals change to a distinct pink color when exhausted. Indicating Drierite can be regenerated in an oven for longer life or can be replaced as needed.