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.
Medchemexpress LLC DL-erythro/threo sphinganine (d16:0) | 50731-08-3 | 98.0% | 1MG
DL-erythro/threo sphinganine (d16:0) | 50731-08-3 | 98.0% | 1MG
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.
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 3 Gram, 1-1/16" x 2-1/16", 24.4 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: 1-1/16" x 2-1/16"
Capacity: 24.4 cubic inch
Petroleum Analyzer Corporation Kit, Drierite, Indicating, Refill, 10-20 Mesh, 1 lb.
Kit, Drierite, Indicating, Refill, 10-20 Mesh, 1 lb.
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.
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.
Sigma Aldrich Fine Chemicals Biosciences Starch from corn practical1KG
Starch is a natural storage carbohydrate polymer produced by plants and varies in its form and function. It is considered as a macroconstituent of food and serves as an energy source. It is renewable and can be biodegraded. Glucose polymers amylose and amylopectin forms starch molecule. Starch influences the food structure and quality. It is a native high amylose corn starch.
eMolecules 112926-00-8 | Silicagel LC60A 40-63 micron | Oakwood Chemical | MFCD00011232 | 60.083 | O2Si | 0.000 | O=[Si]=O | 100g | 596366755
Silicagel LC60A 40-63 micron | Oakwood Chemical | 112926-00-8 | MFCD00011232 | 60.083 | O2Si | 0.000 | O=[Si]=O | 100g | 596366755