AllChemicals — The Online Chemical Glossary | https://allchemicals.info/chemical/459-gel
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Quick Reference
Also Known As
Hydrogel, xerogel (dried gel), silica gel, physical gel, chemical gel
What is Gel?
A colloid in which a liquid is dispersed within a solid or semi-solid matrix, forming a jelly-like substance. Gels have properties between a solid and a liquid. Examples include gelatin, agar, silica gel, and hydrogels used in biomedical applications.
Properties & Characteristics
A gel is a colloidal system in which a liquid is entrapped in a three-dimensional solid or semi-solid polymer or inorganic network. The network prevents flow, giving gel-like rheological properties (elastic solid behaviour at low stress, viscous flow at high stress). Examples: gelatin (protein network in water), silica gel (SiO₂ network), agar, polyacrylamide gel (PAG used in electrophoresis), hydrogels (crosslinked polymer networks).
Uses & Applications
Gels are used in: food products (jellies, yoghurt, desserts), pharmaceuticals (topical gels, wound dressings, contact lenses), analytical chemistry (silica gel chromatography, polyacrylamide gel electrophoresis), cosmetics, and materials science (aerogels as ultra-lightweight insulators).
Safety Information
Acrylamide monomer (used to make polyacrylamide gels) is a potent neurotoxin and potential carcinogen. Always handle unpolymerised acrylamide in a fume hood with gloves. Silica gel dust is a respiratory irritant. Some food gels contain allergens (gelatin from animal sources).
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
SynonymsHydrogel, xerogel (dried gel), silica gel, physical gel, chemical gel
Frequently Asked Questions
A colloid in which a liquid is dispersed within a solid or semi-solid matrix, forming a jelly-like substance. Gels have properties between a solid and a liquid. Examples include gelatin, agar, silica gel, and hydrogels used in biomedical applications.
Gels are used in: food products (jellies, yoghurt, desserts), pharmaceuticals (topical gels, wound dressings, contact lenses), analytical chemistry (silica gel chromatography, polyacrylamide gel electrophoresis), cosmetics, and materials science (aerogels as ultra-lightweight insulators).
Acrylamide monomer (used to make polyacrylamide gels) is a potent neurotoxin and potential carcinogen. Always handle unpolymerised acrylamide in a fume hood with gloves. Silica gel dust is a respiratory irritant. Some food gels contain allergens (gelatin from animal sources).
Editorial standards: Chemical data is sourced from peer-reviewed literature,
CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA,
and IAEA. For educational purposes only — always consult official SDS documentation and qualified
professionals before handling chemicals.
