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.
Calcium Chloride, Anhydrous (Pellets, 4-20 mesh, for Desiccators), Fisher Chemical™
CAS: 10043-52-4 Formule moléculaire: CaCl2 Poids moléculaire (g/mol): 110.98 Numéro MDL: MFCD00010903 Clé InChI: UXVMQQNJUSDDNG-UHFFFAOYSA-L PubChem CID: 5284359 ChEBI: CHEBI:3312 Nom de l’IUPAC: calcium dichloride SOURIRES: [Cl-].[Cl-].[Ca++]
Humidity Sponge™ Dessicant Window Type, Fisherbrand™
Meet all drying requirements with these humidity sponges. Fisherbrand™ Dessicant Window Type Humidity Sponges™ are non-toxic and Class M3.5 cleanroom-compatible.
Silica Gel Desiccant Indicating(Grade 48, 4-10 Mesh/Certified ACS), Fisher Chemical™
Drierite™ Indicating Absorbents, W.A. Hammond
Efficient desiccant giving constant visual indication of the progress of absorption and exhaustion. W A Hammond Drierite™ Drying Dessicants dries organic liquids to low ppm levels and is commonly used in desiccators, desiccator cabinets, in-line air and gas dryers.
Calcium Chloride (Desiccant, 20 mesh and Finer) ACS Grade, Fisher Chemical™
CAS: 10043-52-4 Formule moléculaire: CaCl2 Poids moléculaire (g/mol): 110.98 Numéro MDL: MFCD00010903 Clé InChI: UXVMQQNJUSDDNG-UHFFFAOYSA-L PubChem CID: 5284359 ChEBI: CHEBI:3312 Nom de l’IUPAC: calcium dichloride SOURIRES: [Cl-].[Cl-].[Ca++]
Silica Gel Desiccant (28-200 mesh, Grade 12), Fisher Chemical
CAS: 63231-67-4 Formule moléculaire: H2O3Si Poids moléculaire (g/mol): 78.098 Numéro MDL: MFCD00011232 Clé InChI: IJKVHSBPTUYDLN-UHFFFAOYSA-N PubChem CID: 14768 Nom de l’IUPAC: dihydroxy(oxo)silane SOURIRES: O[Si](=O)O
Silica Gel Desiccant (60-200 Mesh/Chromatographic Grade), Fisher Chemical™
CAS: 7631-86-9 Formule moléculaire: O2Si Poids moléculaire (g/mol): 60.08 Numéro MDL: MFCD00011232 MFCD00217788 MFCD00163736 MFCD00148266 MFCD00603035 MFCD02100519 MFCD06202255 MFCD07370733 Clé InChI: VYPSYNLAJGMNEJ-UHFFFAOYSA-N PubChem CID: 24261 ChEBI: CHEBI:30563 Nom de l’IUPAC: silanedione SOURIRES: O=[Si]=O
Silica Gel, Grade 47 (10-18 Mesh/Certified ACS), Fisher Chemical™
Humidity Sponge™, Fisherbrand™
Humidity Sponge Dessicant; Fisherbrand; Reusable Type
Silica Gel Desiccant (100-200 Mesh/923, Chromatographic Grade), Fisher Chemical™
CAS: 7631-86-9 Formule moléculaire: O2Si Poids moléculaire (g/mol): 60.08 Numéro MDL: MFCD00011232 MFCD00217788 MFCD00163736 MFCD00148266 MFCD00603035 MFCD02100519 MFCD06202255 MFCD07370733 Clé InChI: VYPSYNLAJGMNEJ-UHFFFAOYSA-N PubChem CID: 24261 ChEBI: CHEBI:30563 Nom de l’IUPAC: silanedione SOURIRES: O=[Si]=O
Silica Gel Desiccant (6-14 Mesh, Certified ACS), Fisher Chemical™
CAS: 63231-67-4 Formule moléculaire: H2O3Si Poids moléculaire (g/mol): 78.098 Numéro MDL: MFCD00011232 Clé InChI: IJKVHSBPTUYDLN-UHFFFAOYSA-N PubChem CID: 14768 Nom de l’IUPAC: dihydroxy(oxo)silane SOURIRES: O[Si](=O)O
Soda lime, pure, granular, with indicator white to violet
CAS: 8006-28-8 Formule moléculaire: CaHNaO2 Poids moléculaire (g/mol): 96.074 Numéro MDL: MFCD00134094 Clé InChI: HUAUNKAZQWMVFY-UHFFFAOYSA-M PubChem CID: 66545795 Nom de l’IUPAC: sodium;oxocalcium;hydroxide SOURIRES: [OH-].O=[Ca].[Na+]
Silica gel 60, 0.062-0.105mm (150-230 mesh)
CAS: 7631-86-9 Formule moléculaire: O2Si Poids moléculaire (g/mol): 60.08 Numéro MDL: MFCD00011232 MFCD00217788 MFCD00163736 MFCD00148266 MFCD00603035 MFCD02100519 MFCD06202255 MFCD07370733 Clé InChI: VYPSYNLAJGMNEJ-UHFFFAOYSA-N PubChem CID: 24261 ChEBI: CHEBI:30563 Nom de l’IUPAC: dioxosilane SOURIRES: O=[Si]=O
Drierite™, regular (CaSO{4}), Lab Grade
CAS: 7778-18-9 Formule moléculaire: CaO4S Poids moléculaire (g/mol): 136.13 Numéro MDL: MFCD00010912 Clé InChI: OSGAYBCDTDRGGQ-UHFFFAOYSA-L PubChem CID: 24497 ChEBI: CHEBI:31346 Nom de l’IUPAC: calcium sulfate SOURIRES: [Ca++].[O-]S([O-])(=O)=O
Drierite™, with indicator, 10-20 mesh
CAS: 7778-18-9 Formule moléculaire: CaO4S Poids moléculaire (g/mol): 136.13 Numéro MDL: MFCD00010912 Clé InChI: OSGAYBCDTDRGGQ-UHFFFAOYSA-L PubChem CID: 24497 ChEBI: CHEBI:31346 SOURIRES: [Ca++].[O-]S([O-])(=O)=O