Chemical Solubility Analysis Results

Compound

Caffeine (C₈H₁₀N₄O₂)

Solvent

Water

Temperature

25°C

Pressure

1 atm

Estimated Solubility

Mass Concentration: 21.6 g/L

Molar Concentration: 0.111 mol/L

Confidence Score: High (92%)

Solubility Classification

Moderately Soluble

Suitable for most aqueous applications with moderate dissolution rates

Scientific Explanation

Hansen Solubility Parameter Analysis

The Hansen parameters show moderate compatibility between caffeine (δD=19.0, δP=12.3, δH=7.8) and water (δD=15.5, δP=16.0, δH=42.3). The significant difference in hydrogen bonding parameters indicates limited but measurable solubility.

Molecular Interactions

Caffeine's purine structure allows for hydrogen bonding with water molecules through its nitrogen and oxygen atoms. However, the hydrophobic methyl groups limit overall water interaction, resulting in moderate solubility.

Temperature Effect

At 25°C, caffeine exhibits typical endothermic dissolution behavior. Increasing temperature would significantly enhance solubility due to increased molecular motion and disruption of crystal lattice structure.

Pressure Effect

At standard atmospheric pressure (1 atm), pressure effects on solubility are negligible for this solid-liquid system, as expected for most organic compounds in aqueous solutions.

Limitations & Considerations

Estimation assumes pure water without pH buffering or ionic strength effects
Crystal form and particle size may affect dissolution kinetics
Experimental verification recommended for critical applications
No significant safety concerns for this compound-solvent combination

Additional Recommendations

Alternative Solvents

Consider ethanol-water mixtures or DMSO for enhanced solubility

Laboratory Notes

Use gentle heating (40-60°C) and stirring to accelerate dissolution

Reference Database

Values cross-referenced with CRC Handbook and NIST solubility data

Chemical Solubility Estimator