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.
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
Hach Company Desiccant Cartridge, 6/pk
These silica gel desiccant cartridges are used with the dry storage chamber for the Portable LDO Probe.
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 1,4-Oxazepin-5(2H)-one, 4-[3-[[2-[[2-ethyl-4-(4-methyl-1-piperazinyl)phenyl)amino]-5-... | 2543673-19-2 | 99.7% | 535.60 | 1 G](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000394573.png-250.jpg)
Medchemexpress LLC 1,4-Oxazepin-5(2H)-one, 4-[3-[[2-[[2-ethyl-4-(4-methyl-1-piperazinyl)phenyl)amino]-5-... | 2543673-19-2 | 99.7% | 535.60 | 1 G
DCC-3116 is an orally active ULK1/2 inhibitor. It inhibits autophagy in lung cancer cells by targeting KRASG12C signaling, which in turn reduces the proliferation of lung cancer cells and exerts anti-cancer effects.
- Orally active ULK1/2 inhibitor
- Inhibits autophagy in lung cancer cells
- Targets KRASG12C signaling
- Reduces proliferation of lung cancer cells
- Exerts anti-cancer effects
WA HAMMOND DRIERITE COMPANY DRIERITE, REGULAR (NON-INDICATING) 10-20 MESH 1 LB JAR, STOCK# 14001
Regular Drierite is anhydrous calcium sulfate. It is of neutral pH, constant in volume, chemically inert except toward water, insoluble in organic liquids and refrigerants, non-disintegrating, non-wetting, non-toxic, non-corrosive, non-channeling, generally recognized as safe (GRAS) by the FDA, not regulated by OSHA, economical to use, and can be regenerated repeatedly for reuse. 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. Organic liquids are dried to the low ppm range. There is little change in efficiency at temperatures up to 100° C. Typical Analysis: >99.5% CaSO4
Sorbent Technologies Inc Silica Gel Desiccant Spheres w/100% Yellow Indicator, 2-5mm, 1kg
Silica Gel Desiccant Spheres with 100% yellow indicator are non-corrosive and chemically inert. The desiccant spheres have particle distribution of 2-5mm 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 yellow indicator (phenol phthalein) turn blue/green upon reaching moisture capacity.
Sorbent Technologies Inc Silica Gel Desiccant Spheres w/100% Blue Indicator, 2-5mm 5kg
Silica Gel Desiccant Spheres with 100% blue indicator are non-corrosive, non-toxic, and chemically inert. The desiccant spheres have particle distribution of 2-5mm and a quantity of 5kg. 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.
Electron Microscopy Sciences Desiccant Cartridge, Small
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.
WA HAMMOND DRIERITE COMPANY DRIERITE, INDICATING 10-20 MESH 5 LB JAR, STOCK# 24005
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
Metrohm USA ASCARITE CO2 ABSORBER
Ascarite ™ CO2 Absorber. A granular form of Ascarite 8-20 Mesh, 500 grams.
Sigma Aldrich Fine Chemicals Biosciences Dextrin from corn Type I p1KG
DEXTRIN Dextrin from corn Type I p1KG