Pharmaceutical Materials

2-Phenylisobutyric acid

Pharmaceutical Materials 2025-03-02

CAS Number: 826-55-1

Molecular Formula: C10H12O2

Molecular Weight: 164.20 g/mol

Appearance: White crystalline

Melting Point: 80-82°C

Boiling Point: 146.5°C (or 270.5°C at 760 mmHg)

Usage: Used as an organic chemical intermediate.

Aspect	Details
Name	2-Phenylisobutyric Acid
CAS No.	826-55-1
Molecular Formula	C₁₀H₁₂O₂
Molecular Weight	164.2 g/mol
Physical Properties	Appearance: White crystalline powder Melting Point: 80-82 °C Solubility: Slightly soluble in chloroform and methanol; soluble in water with heating Density: Not explicitly stated but estimated based on structure to be approximately 1.1-1.2 g/cm³
Chemical Properties	Contains a phenyl group and an isobutyric acid moiety, making it a versatile intermediate in organic synthesis. The carboxylic acid group can undergo esterification, amidation, and decarboxylation reactions, while the phenyl ring allows for aromatic substitution.
Applications	Used as a key intermediate in the synthesis of pharmaceuticals, including antihistamines like fexofenadine Employed in the production of fragrances and flavors due to its aromatic properties Acts as a building block in the synthesis of polymers and liquid crystals
Safety Information	Handle with appropriate personal protective equipment to avoid skin and eye contact Store in a cool, dry, and well-ventilated area away from moisture and incompatible substances

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2-Phenylisobutyric acid

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