Ethyl 2-bromothiazole-5-carboxylate

China [CN]

1. Appearance and Properties

At room temperature and pressure, it is typically a colorless to pale yellow, transparent liquid (it may appear light brown at low purity and slightly turbid when containing trace solid impurities).

It has a slight characteristic ester odor and is not strongly irritating.

2. Boiling Point, Melting Point, and Density

Boiling Point: Approximately 245–250°C at atmospheric pressure (actual measurements may vary slightly due to equipment accuracy). Under reduced pressure (e.g., 10 mmHg), the boiling point drops to 120–125°C (facilitating distillation and purification).

Melting Point: Solidifies at low temperatures, with a melting point of approximately -5–0°C (easily liquid at room temperature and flows without heating).

Density: 1.560–1.580 g/cm³ at 20°C (typical value 1.572 g/cm³, higher than water, allowing for a preliminary assessment of purity using density).

Refractive Index: 1.5650–1.5700 at 20°C (an important indicator for optical purity testing; pure materials have a narrow and stable refractive index range).