Understanding CAS No. 999-97-3: An Insight into tert-Butylamine

Chemical compounds are the backbone of countless industries, from pharmaceuticals to agriculture and everything in between. One such compound, often overlooked despite its broad relevance, is tert-Butylamine, designated by CAS Registry Number 999-97-3. This article explores the essential characteristics, uses, production methods, safety considerations, and environmental impact of tert-butylam


What is CAS No. 999-97-3?

CAS No. 999-97-3 refers to tert-Butylamine, an organic compound and one of the simplest alkyl-substituted amines. The molecular weight of tert-butylamine is approximately 73.14 g/mol, and it has a boiling point of around 44–46°C (111–115°F), making it relatively volatile compared to other amines.


Chemical and Physical Properties

Some key physical and chemical characteristics of tert-butylamine include:

  • Molecular Formula: C₄H₁₁N
  • Molecular Weight: 73.14 g/mol
  • Appearance: Colorless liquid
  • Boiling Point: 44–46°C
  • Density: Approximately 0.693 g/mL at 20°C
  • Solubility: Miscible with water, ethanol, and ether
  • Odor: Pungent, ammonia-like smell
  • Vapor Pressure: Relatively high, contributing to its volatility

These characteristics make tert-butylamine highly reactive and valuable as a building block in organic synthesis.


Applications of tert-Butylamine

Tert-butylamine serves as a versatile intermediate in a wide array of chemical processes. Its primary uses span several sectors:

1. Pharmaceuticals

It plays a role in the synthesis of various pharmaceutical compounds, especially those requiring the introduction of a bulky amine group. It can be used in salt formation with acidic drugs, improving their solubility and bioavailability.

2. Agrochemicals

The agricultural industry utilizes tert-butylamine in the formulation of herbicides and pesticides. Its structure allows it to act as a precursor to more complex molecules that exhibit selective toxicity toward pests and weeds, helping to improve crop yields and food security.

3. Chemical Synthesis

As a sterically hindered amine, tert-butylamine is favored in organic synthesis where reactivity needs to be controlled. Its bulky tert-butyl group limits its nucleophilicity, making it useful in processes requiring mild or selective reactivity. It is often employed in the preparation of tert-butyl carbamates, which are used as protecting groups for amines.

4. Rubber and Polymer Industry

These chemicals enhance the vulcanization process and improve the final properties of rubber products.


Synthesis and Production

Tert-butylamine is typically produced through the reaction of isobutylene with ammonia in the presence of a catalyst. This process, known as aminating alkene compounds, allows for efficient, large-scale production.

Alternatively, it can be prepared by the reduction of tert-butyl nitrite or by amination of tert-butyl halides. The chosen method depends on the scale of production and the required purity of the final product.


Safety and Handling

Like many amines, tert-butylamine poses certain health and safety hazards. It is classified as a flammable liquid and should be handled with care.

Health Hazards:

  • Inhalation of vapors can irritate the respiratory system.
  • Skin and eye contact may cause irritation or chemical burns.
  • Ingestion can result in gastrointestinal distress and systemic toxicity.

Due to its volatility, it can form explosive mixtures with air, particularly in poorly ventilated areas.

Safety Measures:

  • Wear appropriate PPE (gloves, goggles, lab coat).
  • Store in cool, dry, and fireproof environments, away from oxidizing agents.
  • Ensure proper labeling and containment to prevent accidental exposure.


Environmental Considerations

Tert-butylamine is moderately hazardous to the environment, particularly aquatic systems. If released into water bodies, it can cause harm to aquatic life. As such, spills should be contained and neutralized quickly.

Its environmental impact is mainly due to:

  • High volatility (can contribute to air pollution)
  • Water solubility (may contaminate water sources)
  • Biodegradability (moderate — may persist under certain conditions)

For this reason, waste disposal must adhere to regional and international regulations, typically involving incineration or chemical treatment in controlled facilities.


Regulatory Status

Tert-butylamine is regulated under several international chemical safety frameworks:

  • REACH (EU): Registered with specific handling guidelines
  • TSCA (USA): Listed, with workplace exposure limits set by OSHA
  • GHS Classification: Flammable liquid, toxic by inhalation, causes skin and eye irritation

While not considered a persistent organic pollutant (POP), its handling is closely monitored in industrial settings.


Conclusion

CAS No. 999-97-3, known as tert-butylamine, may not be a household name, but it plays a vital role across multiple industries. From pharmaceuticals and agrochemicals to polymer manufacturing, its versatility and reactivity make it an invaluable intermediate in organic synthesis.

Despite its benefits, handling tert-butylamine requires caution due to its toxicity and flammability. With proper safety protocols and responsible usage, it continues to support scientific and industrial innovation.

As we advance toward greener chemistry and safer production processes, the importance of understanding compounds like tert-butylamine becomes even more critical. Whether you're a chemist, engineer, or student, keeping abreast of such foundational chemicals helps build a better, safer, and more sustainable world.


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