Citric Acid (Anhydrous/Monohydrate)

Physical State: Solid (crystalline)

Color/Appearance: White, odorless crystalline solid

Melting Point: ~ 153 °C (decomposes)

Boiling Point: Decomposes before boiling (~ 310 °C listed for decomposition)

Density: ~ 1.542 g/cm³ (monohydrate, 20 °C) or ~ 1.665 g/cm³ (anhydrous)

Refractive Index: ~ 1.493 – 1.509 (for aqueous solutions)

Solubility: Very soluble in water (e.g. ~ 592 g/L at 20 °C)

Storage Conditions: Store in a cool, dry place; protect from moisture and light

Molecular Formula: C₆H₈O₇

Molecular Weight: 192.12 g/mol

Physical State: Solid

Color/Appearance: White crystalline solid

Melting Point: 135 °C

Boiling Point: 56 °C at 760 mmHg (lit.)

Density: 0.791 g/mL at 25 °C (lit.)

Bulk Density: 800-1000 kg/m³

Vapor Density: 2 (vs air)

Vapor Pressure: 184 mmHg at 20 °C

Refractive Index: n²⁰/D 1.359 (lit.)

Flash Point: 1 °F

Solubility: Very soluble in water (1630 g/L at 20°C); freely soluble in ethanol; slightly soluble in ether

Molecular Formula: C₆H₁₀O₈ (C₆H₈O₇ • H₂O)

Molecular Weight: 210.14 g/mol

pKa: 3.138, 4.76, 6.401

pH: 1.85 (50 g/L, H₂O, 25 °C)

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