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.
Apexbio Technology LLC Cell Counting Kit-8 (CCK-8) Plus 1UN 1x5ml (500 tests)
Cell Counting Kit-8 (CCK-8) Plus is a convenient and sensitive assay kit for cell proliferation and cytotoxicity detection It utilizes a highly water-soluble tetrazolium salt WST-8 which can be reduced by abundant dehydrogenases in living cells to a soluble orange-colored formazan dye in the presence of electron mediator reagents The amount of formazan produced by dehydrogenases is directly proportional to the number of viable cells This optimized kit requires only 0 5-1 hour incubation for detection offering greater sensitivity faster detection speed and a broader linear range compared with standard CCK-8 kits
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.
Hach Company Drierite w/o indicator 454g
Desiccant-Drierite-(without indicator) 454gIndicating Drierite changes from a blue color when dry to red upon absorption of moisture Packaged in 454-g (1 lb) containers
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
Sigma Aldrich Fine Chemicals Biosciences LUDOXR HS 40 colloidal sil
Contains ~250ppm of total biocides (5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-2H-isothiazol-3-one (31))
Research Products International Corp Humidity Sponges, Single Use, 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.
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.
Strem, An Ascensus Company CAS# 63231-67-4. 2kg. Silica gel, 6-16 mesh (indicating). MFCD00011232
CAS# 63231-67-4. 2kg. Silica gel, 6-16 mesh (indicating). MFCD00011232. Molecular Weight: 78.10. Molecular Formula: H2SiO3. Color/form: blue xtl. Strem# 93-1423. http://www.strem.com/catalog/v/93-1423/
Electron Microscopy Sciences Desiccant Canister - Reusable
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.
Electron Microscopy Sciences Desiccant Cartridge, Large
These desiccant cartridges can be used in desiccator cabinets or non-vacuum desiccators, analytical balance cases, and precision laboratory instruments. The clear polystyrene dish allows for instant visual inspection of the silica gel color which changes from blue to pale pink as it absorbs moisture.
A highly porous membrane covers the dish of the desiccant providing good moisture absorption. The desiccant can be regenerated by heating cartridges in an oven at 50 degree C (122 degree F) overnight or in a 150 degree C (302 degree F) oven for one hour. The silica gel is inert and non-toxic. Each cartridge is individually sealed in aluminum foil. Dispose of the cartridges after repeated use.
Perkin Elmer US LLC Rechargeable Desiccant Kit for PerkinElmer Spectrum One/ Spectrum One NTS FT-IR
Rechargeable Desiccant Kit comes with four desiccant cartridges. Rechargeable desiccant cartridges are contained in rigid metal cages which are user-installable. Two cartridges are required for Spectrum One and Spectrum One NTS spectrometers. It is recommended to have spare desiccant cartridges available so when a desiccant change is required recharged desiccant can be installed immediately.
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
Electron Microscopy Sciences Silica Gel Canister, 100 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.