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.
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/
Medchemexpress LLC RNA aptamer Corn (sodium) | 91.3% | 10 MG
RNA Aptamer Corn (sodium) is a fluorogenic 28-nucleotide RNA aptamer that binds the DFHO chromophore to produce bright red fluorescence for RNA imaging in live cells. The aptamer shows increased photostability and low cytotoxicity upon illumination. A 36-nt construct (28-nt core plus a 4-bp stem) is described for enhanced stability. Supplied as a sodium salt with reported purity of 91.29% and available in multiple pack sizes including 10 mg.
- Enables bright red fluorescence upon binding DFHO.
- Suitable for live-cell RNA imaging with low cytotoxicity.
- Improved photostability versus other aptamer-chromophore complexes.
- Provided as sodium salt with reported purity of 91.29%.
- Includes sequence information for minimal (28 nt) and extended (36 nt) constructs.
- Store sealed at -20°C; in solvent, store at -80°C for long-term.
Nanocs SILICA NANOPARTICLES AMINE 1L
Silica nanoparticles, amine functional, 200 nm, 1 mL, Quote 2505301EL
Medchemexpress LLC SVS-1 peptide acetate | 1370453-04-5 | 99.41% | 2031.66 | 10 MG
SVS-1 peptide acetate is an anticancer peptide that selectively recognizes cancer cells through electrostatic interactions, disrupts the cell membrane structure, and leads to cell death. Its efficacy occurs before complete neutralization of the membrane charge, unlike antimicrobial peptides.
- Selectively recognizes cancer cells through electrostatic interactions
- Disrupts cell membrane structure
- Leads to cell death
- Efficacy precedes complete neutralization of membrane charge
U.S. Pharmacopeia Desiccant, Small, 2 pouches
Desiccant, Small (2 pouches (approximate weight 44 grams, each)).
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.
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.
Hach Company Desiccant, Drierite (with indicator) 454g
Indicating Drierite changes from a blue color when dry to red upon absorption of moisture. Packaged in 454-g (1 lb) containers.
Uline Silica Gel Desiccants - Gram Size 3, 5 Gallon Pail
Silica Gel Desiccants - Gram Size 3, 5 Gallon Pail
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, 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.
Hach Company HexaVer™ CDTA Powder Pillows, pk/100
CDTA Disodium Salt (HexaVer). Chelating agent for interference removal. Pack of 100 Powder Pillows.