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 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.
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 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.
Andwin Scientific HUMIDITY INDICATOR CARD
The Humidity Indicator Cards are ideal for use as spot indicator. Humidity is less than 30% if the spot is in the "blue" condition. As humidity becomes greater than 30%, the spot will transform from "blue" to "pink"
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 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.
Electron Microscopy Sciences Silica Gel Packets 2 Gram, 7/8" x 2-1/8", 12.2 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: 7/8" x 2-1/8"
Capacity: 12.2 cubic inch
Electron Microscopy Sciences Silica Gel Packets 1 Gram, 7/8" x 1½", 6.1 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: 7/8" x 1½"
Capacity: 6.1 cubic inch
Hach Company Desiccant Assembly for SD900
Desiccant assembly for SD900 Sampler includes grease packet