Month: July 2025

Quantitative Approach to Factors Influencing Solubility of Drugs

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Quantitative Approach to Factors Influencing Solubility of Drugs

A Quantitative Approach to Factors Influencing Solubility of Drugs solubility involves analyzing how physicochemical properties and environmental conditions affect dissolution. Key Factors Influencing Solubility: Physicochemical Properties: Molecular Size and Structure: Larger molecules typically have lower solubility. Polarity and pKa: Polar drugs and ionized forms are more soluble in water; the Henderson-Hasselbalch equation determines ionization. Partition … Read more

Ideal Solubility Parameters

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Ideal Solubility Parameters

Ideal solubility parameters provide a quantitative measure of the solubility of substances. They are based on the concept that similar intermolecular forces between solute and solvent lead to better solubility. The most common parameter is the Hildebrand solubility parameter (δ), which is defined as: $\delta = \sqrt{\frac{\Delta H_v – RT}{V_m}}$ Where: ΔHv​ = Enthalpy of … Read more

Vanillin

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Vanillin

Vanillin Definition  Vanillin is an organic compound with the molecular formula C₈H₈O₃. It is the primary component of the extract of the vanilla bean that gives vanilla its characteristic flavor and aroma. Structure: Chemical Formula: C₈H₈O₃ Molecular Structure: Contains a benzene ring with a methoxy group (-OCH₃), a hydroxyl group (-OH), and an aldehyde group … Read more

Benzaldehyde

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Benzaldehyde

Benzaldehyde Definition  Benzaldehyde is an organic compound with the formula C₆H₅CHO. It is the simplest aromatic aldehyde, consisting of a benzene ring attached to a formyl group (-CHO). Structure: Chemical Formula: C₇H₆O Molecular Structure: Composed of a benzene ring attached to a formyl group (–CHO). Geometry: Planar around the benzene ring and the carbonyl group. … Read more

Hexamine (Hexamethylenetetramine)

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Hexamine (Hexamethylenetetramine)

Hexamine (Hexamethylenetetramine) Definition  Hexamine is a solid, cage-like organic compound composed of four nitrogen atoms and six carbon atoms connected by methylene bridges. It is commonly used as a urinary antiseptic, fuel tablet component, and in the synthesis of explosives (such as RDX) and plastics. Structure: Chemical Formula: C₆H₁₂N₄ Molecular Structure: A heterocyclic compound consisting … Read more

Chloral Hydrate

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Chloral Hydrate

Chloral Hydrate Definition Chloral Hydrate is a sedative and hypnotic chemical compound with the formula C₂H₃Cl₃O₂. It is a clear, colorless liquid or crystalline solid, historically used as a sleep-inducing agent and anxiolytic. When ingested, it is metabolized into trichloroethanol, the active substance responsible for its central nervous system depressant effects. Structure: Chemical Formula: C₂H₃Cl₃O₂ … Read more

Acetone

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Acetone

Acetone Definition  Acetone is a colorless, volatile, flammable liquid organic compound with the chemical formula C₃H₆O. It is the simplest and smallest ketone, also known by its IUPAC name propanone. Structure: Chemical Formula: C₃H₆O Molecular Structure: A three-carbon chain with a carbonyl group (C=O) bonded to the central carbon, with the remaining valencies filled by … Read more

Paraldehyde

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Paraldehyde

Paraldehyde Definition  Paraldehyde is a chemical compound with the formula (C2H4O)3(C_2H_4O)_3(C2​H4​O)3​. It is a cyclic trimer of acetaldehyde, formed through polymerization under acidic conditions. Structure: Chemical Formula: (C₂H₄O)₃ Molecular Structure: A cyclic trimer of acetaldehyde, consisting of three acetaldehyde molecules bonded in a ring. Geometry: Each carbon is sp² hybridized, forming a six-membered ring. Uses: … Read more

Mechanisms of Solute-Solvent Interactions

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Mechanisms of Solute-Solvent Interactions

Solute-Solvent Interactions & Solubility is largely determined by the interactions between solute and solvent molecules. Steps Involved in the Dissolution of a Solute Detachment of Solute Particles: Solute particles separate from the bulk solute. Requires energy to overcome intermolecular forces. Formation of Vacant Sites in Solvent: Solvent molecules rearrange to create vacant sites. These sites … Read more

Formaldehyde

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Formaldehyde

Formaldehyde Definition Formaldehyde is a colorless, flammable gas with a strong, pungent odor. It is the simplest aldehyde, with the chemical formula CH₂O. It is widely used in the production of resins, textiles, disinfectants, and as a preservative in laboratories and mortuaries. It is highly reactive and can pose health risks, including respiratory irritation and … Read more