H

Hydrophilic

ΔG_solvation < 0
Quick Reference
Formula / NotationΔG_solvation < 0
Also Known AsWater-loving, water-soluble (related), polar, water-miscible

What is Hydrophilic?

Describes molecules or groups that are attracted to water and readily dissolve in or absorb water. Hydrophilic substances typically have polar bonds or charged groups. The term means "water-loving." Hydrophilic molecules can form hydrogen bonds with water.

Formula & Notation

ΔG_solvation < 0

Other Names / Synonyms: Water-loving, water-soluble (related), polar, water-miscible

Properties & Characteristics

Hydrophilic ("water-loving") describes a molecule or group that has a strong affinity for water. Hydrophilic substances are typically polar (hydroxyl, amino, carboxylate, sulfonate groups) or ionic, interacting with water through hydrogen bonding or ion-dipole interactions. They dissolve readily in water and prefer aqueous environments. The partition coefficient (log P) is negative or low for hydrophilic compounds.

Uses & Applications

Hydrophilic properties determine biological availability: hydrophilic drugs are water-soluble but may have limited membrane permeability; balance with hydrophobicity (Lipinski's Rule of Five) is needed for oral bioavailability. Hydrophilic polymers (PEG, polyvinyl alcohol) are used as coatings in drug delivery and as antifouling agents.

Safety Information

Hydrophilic chemicals generally absorb well into aqueous environments (bloodstream, body fluids). This can mean rapid systemic distribution of toxic hydrophilic substances. Highly hydrophilic ionic compounds (heavy metal salts, HCN) are readily absorbed from aqueous exposures.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Hydrophilic
Formula ΔG_solvation < 0
Synonyms Water-loving, water-soluble (related), polar, water-miscible

Frequently Asked Questions

Describes molecules or groups that are attracted to water and readily dissolve in or absorb water. Hydrophilic substances typically have polar bonds or charged groups. The term means "water-loving." Hydrophilic molecules can form hydrogen bonds with water.

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