This product is a reference substance for gas chromatography (GC), specifically known as 2-Butanone (CAS 78-93-3). It falls under the category of ketones. The molecular formula is C4H8O with a Molecular Weight of 72.11 g/mol. In the workplace, it is labeled with various warnings such as "Prohibition label," "No open flame; fire, open ignition sources and smoking prohibited," "No admittance for unauthorized persons," "Warning label," "Caution - inflammable material," "Precept label," "Use safety goggles," and "Wear safety gloves." The recommended indicative occupational exposure limit value for the European Union is an 8-hour limit value of 600 mg/m3 (200 ppm) and a short-term limit value of 900 mg/m3 (300 ppm) according to Directive 2000/

• CAS Number: 78-93-3
• Molecular Formula: C4H8O
• Molecular Weight: 72.11
• Exact Mass: 72.057514874
• Boiling Point: 175.3 °F at 760 mmHg (NTP, 1992)
• Melting Point: -123.3 °F (NTP, 1992)
• Vapour Density: 2.42 (NTP, 1992) - Heavier than air; will sink (Relative to Air)
• GHS Signal Word: Danger
• Hazard Statements:
• H225: Highly Flammable liquid and vapor [Danger Flammable liquids]