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.
Ace Glass, Inc. 8 MESH INDICATNG DRIERITE 5 LB
8 mesh Drierite. The granules of calcium sulfate are impregnated with CP cobalt chloride. On dehydration, the active desiccant assumes a distinct blue color. In use, the color changes to a rose-red. 5/lb.
WA HAMMOND DRIERITE COMPANY DRIERITE, INDICATING 10-20 MESH 25 LB DRUM, STOCK# 24025
Indicating Drierite is impregnated with cobalt chloride. Indicating Drierite is blue when dry and changes to pink upon absorption of moisture. The color change is pronounced and clearly visible. This makes Indicating Drierite valuable when it is necessary to know with certainty that dryness is being maintained and to signal when the drying agent should be replaced. It has the same efficiency as Regular Drierite, and somewhat greater capacity due to the desiccating effect of the cobalt chloride. It can be regenerated repeatedly for reuse. It should be noted that Indicating Drierite should not be used for the drying of ammonia, NH3, since ammonia reacts with inorganic chlorides. Efficiency: The moisture remaining in gases dried with Drierite at 25° - 30° C is 0.005 mg./liter, (data verified by the National Bureau of Standards). Air is dried to a dew point of -100° F. There is little change in efficiency at temperatures up to 100° C. Typical Analysis: ≥ 98% CaSO4, <2% CoCl2
Pfaltz & Bauer Drierite @ 8 Mesh With Indicat| 1 lb| 7778-18-9
Drierite @ 8 Mesh With Indicat| 1 lb| 7778-18-9
Hach Company Desiccant Cartridge, 6/pk
These silica gel desiccant cartridges are used with the dry storage chamber for the Portable LDO Probe.
Sigma Aldrich Fine Chemicals Biosciences Phosphorus pentoxide | 1314-56-3 | MFCD00011440 | 100 g
Phosphorus pentoxide | Mol Wt: 141.94 | 1314-56-3 | MFCD00011440 | 100 g
WA HAMMOND DRIERITE COMPANY DRIERITE, MODEL 207-C REPLACEMENT CARTRIDGE, STOCK# 40207
This item is the replacement desiccant cartridge for the Drierite Model 207 Compressed Air & Gas. The cartridge has an indicator window that turns from blue to pink when the cartridge is exhausted.
Medchemexpress LLC Industrial liquors, corn steep liquor | 66071-94-1 | MFCD00130866 | Not applicable - complex mixture (no single molecular weight) | Not applicable - complex mixture (no single chemical formula) | 1 KG
Corn steep liquor is a food-industry by-product used as a nutrient-rich additive for microbial culture media. It promotes fungal mycelial growth and can increase production of secondary metabolites and other biologically active compounds.
- nutrient-rich fermentation supplement.
- promotes mycelial growth and biomass accumulation.
- enhances secondary metabolite and product yields.
- available as powder or concentrated liquid formulations.
- suitable for research use; follow supplier storage recommendations.
Medchemexpress LLC Inlexisertib (DCC-3116) | 2543673-19-2 | 99.3% | 535.60 g/mol | C26H36F3N7O2 | 10 MG
Inlexisertib is a small-molecule, orally active inhibitor of the ULK1 and ULK2 kinases used in preclinical cancer research to inhibit autophagy and sensitize KRAS-mutant tumors to targeted therapies.
- Orally active ULK1/2 inhibitor that blocks autophagy.
- Demonstrated antiproliferative activity in KRAS-mutant cell lines and tumor growth inhibition in non-small cell lung cancer models.
- Molecular formula C26H36F3N7O2 and molecular weight 535.60 g/mol.
- High supplied purity (~99.3%).
- Available in multiple solid pack sizes and as a 10 mM solution in DMSO for in vitro studies.