Isopropyl Ethyl Thionocarbamate (CAS No. 141-98-0): Properties, Applications, and Safety Guidelines

Introduction to Isopropyl Ethyl Thionocarbamate

Isopropyl Ethyl Thionocarbamate, with the CAS Number 141-98-0, is an organic compound widely used as a flotation agent in the mining industry and as an intermediate in chemical synthesis. Also known as O-isopropyl-N-ethylthionocarbamate or IPETC, this compound is valued for its selective binding properties and effectiveness in mineral processing.

Chemical Properties

Isopropyl Ethyl Thionocarbamate is a pale yellow to light yellow or amber oily liquid with a slight pungent odor. Its key chemical properties include:

  • CAS Number: 141-98-0

  • Molecular Formula: C6H13NOS

  • Molecular Weight: 147.24 g/mol

  • Boiling Point: Approximately 165.3°C at 760 mmHg

  • Density: 0.990–1.004 g/cm³

  • Flash Point: 53.8°C

  • Solubility: Sparingly soluble in water, highly soluble in alcohol, ethyl ether, benzene, and petroleum ether

  • Vapor Pressure: 1.88 mmHg at 25°C

  • Refractive Index: 1.484

These properties make it an effective and stable compound for industrial applications, particularly in flotation processes.

Applications

1. Flotation Agent in Mining

Isopropyl Ethyl Thionocarbamate is primarily used as a flotation collector in the mining industry for the separation of nonferrous metallic sulfides, such as copper, lead, zinc, and nickel ores. Its high selectivity and low affinity for pyrite make it ideal for producing high-quality concentrates with reduced arsenic content.

2. Chemical Synthesis

As an organic intermediate, IPETC is used in the synthesis of specialty chemicals, including pesticides, herbicides, and pharmaceutical compounds. Its reactive thionocarbamate group enables the production of derivatives for various applications.

3. Analytical Chemistry

The compound is employed in analytical techniques, such as HS-GC-MS, for analyzing illicit liquor and detecting metal ions or sulfide compounds in laboratory settings.

Safety and Handling

Proper handling of Isopropyl Ethyl Thionocarbamate (CAS No. 141-98-0) is critical due to its potential hazards:

  • Hazards: Classified as acutely toxic if swallowed (H302), causes skin irritation (H315), and is harmful to aquatic life with long-lasting effects (H412). It is also flammable due to its low flash point.

  • Protective Measures: Use personal protective equipment (PPE), including chemical-resistant gloves, safety goggles, and respiratory protection. Handle in a well-ventilated area and avoid contact with skin and eyes.

  • First Aid:

    • If Swallowed: Rinse mouth and seek medical help immediately.

    • If on Skin: Wash with plenty of soap and water; seek medical advice if irritation persists.

    • If in Eyes: Rinse with water for at least 15 minutes and consult a doctor.

  • Storage: Store in a cool, dry, well-ventilated area away from ignition sources and incompatible materials, such as oxidizing agents. Keep containers tightly closed.

  • Disposal: Dispose of in accordance with local regulations via licensed chemical destruction plants or controlled incineration with flue gas scrubbing to prevent environmental contamination.

Always consult the Material Safety Data Sheet (MSDS) for detailed safety information before handling.