Product name: 4-Dimethylaminopyridine; alternative name: N,N-Dimethyl-4-pyridylamine, abbreviated as DMAP

Molecular formula: C7H10N2

EINECS：214‑353‑5

Physical properties

Appearance: White to light yellow crystalline powder with an amine-like odor

Melting point: 108–111 °C

Boiling point: 211°C (at atmospheric pressure); 102-105°C/1.6 kPa

Flash point: 110 °C

Solubility: Soluble in water, methanol, ethanol, dichloromethane, ethyl acetate, and DMF; sparingly soluble in alkanes (Sigma-Aldrich...)

Basic: pKa≈9.7, far stronger in basicity than pyridine, highly efficient nucleophilic acylation catalyst, catalytic activity is 10⁴‑10⁶ times that of pyridine. Sigma-Ald

Specification

Appearance: White to light yellow crystalline powder

Assay (GC): ≥99.0%

Melting Point: 108‑111℃

Loss on Drying: ≤0.50%

Residue on Ignition: ≤0.10%

Main Use

Organic Synthesis Catalyst: Suitable for esterification, acylation, sulfonation, and silicon protection reactions, particularly ideal for sterically hindered alcohols/amines, with an addition amount of 0.5-5 mol%.

Safety Information and Packing

Packing: 25kg/fiber drum

UN No.: UN2811, Toxic Solid Sigma-Ald

Hazard: Contact with skin causes severe toxicity; ingestion and inhalation are toxic; severe eye damage; harm to aquatic environment. 

Storage: Seal, store in a cool, dry place at 2‑30°C, away from strong acids and oxidizing agents, and protect from light.

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