For chemists and researchers working with heterocyclic compounds, a thorough understanding of chemical intermediates is essential for successful synthesis. 2-Amino-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carbonitrile, identified by CAS number 70291-62-2, is a noteworthy example. This compound, a derivative of thiophene, serves as a versatile building block in various organic reactions, particularly within the pharmaceutical and fine chemical sectors. Exploring its detailed chemical profile provides valuable insights for procurement and application.

The structural designation, 2-Amino-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carbonitrile, precisely defines its molecular architecture. Its molecular formula is C8H8N2S, with a corresponding molecular weight of 164.22800. As a solid substance, it typically presents with a light brown to brown coloration. Key physical parameters that are critical for chemists include its melting point, which is reported between 153-154°C, indicating a stable solid at ambient temperatures. The boiling point is quite high at 379.9°C at 760 mmHg, and the flash point is 183.6°C, suggesting a relatively low flammability risk under standard handling conditions. A purity of 95% minimum is generally provided by reputable suppliers, ensuring its suitability for demanding synthetic processes. The density is 1.33 g/cm3, and the refractive index is 1.649.

The stability of this compound under normal atmospheric conditions is a significant advantage for those looking to buy it for their research or manufacturing needs. It is recommended that the material be stored in a cool, dry, and well-ventilated environment, protected from incompatible substances. This ensures the compound's integrity and efficacy over time, a critical factor for any manufacturer or research institution relying on consistent material quality. When sourcing from international markets, especially from countries like China, understanding these specifications from a reliable supplier is key to a smooth procurement process. Competitive pricing is often available, but should always be considered alongside the detailed chemical profile and the supplier's commitment to quality assurance.