In the realm of chemical manufacturing and research, a thorough understanding of a compound's properties is fundamental for safe and effective utilization. 5-Amino-3H-1,3-thiazole-2-thione (CAS: 6294-51-5) is a significant heterocyclic intermediate, crucial for various synthetic pathways in the pharmaceutical and fine chemical industries. This article provides an in-depth look at its key properties, handling recommendations, and safety considerations, essential for researchers and procurement specialists alike.

Physical and Chemical Characteristics

5-Amino-3H-1,3-thiazole-2-thione is typically supplied as a white powder. Its molecular formula is C3H4N2S2, with a molecular weight of 132.21 g/mol. Key physical parameters include:

• Melting Point: Reported in the range of 220-230 °C, indicating its solid state at standard room temperatures and its relative thermal stability.
• Density: Approximately 1.58 g/cm³.
• Boiling Point: Around 238.9 °C at 760 mmHg, though decomposition might occur at elevated temperatures.
• Purity: Commonly available with a purity of 95%+, with higher purities sometimes offered by specialized manufacturers.
• Solubility: Generally soluble in polar solvents, which is an important consideration for reaction design and purification.

Chemically, the presence of the amino group (-NH2) and the thione group (C=S) makes this compound reactive. The thione sulfur can act as a nucleophile, participating in various reactions, while the amino group can undergo acylation or condensation. This reactivity profile is what makes it an attractive building block for synthesizing more complex molecules, including potential pharmaceutical agents and specialized materials. Its acidity factor (pKa) is noted as approximately 7.88±0.40, providing insight into its behavior in different pH environments.

Safety and Handling Guidelines

Adhering to proper safety protocols is crucial when working with any chemical compound. For 5-Amino-3H-1,3-thiazole-2-thione, the GHS symbols typically include GHS05 and GHS07, indicating potential hazards such as skin irritation, serious eye damage, and possibly harmful if swallowed (H302). Precautionary statements (P-statements) like P280 (wear protective gloves/clothing/eye protection/face protection) and P305+P351+P338 (IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing) should be strictly followed.

Storage Recommendations

To maintain the stability and integrity of 5-Amino-3H-1,3-thiazole-2-thione, proper storage is essential. It is recommended to store the compound in a cool, dry place, away from direct sunlight and incompatible materials. Keeping the container tightly closed is vital to prevent moisture absorption and potential degradation. Storage at low temperatures (e.g., -20°C) can further help preserve the compound, especially to prevent oxidation of the thiol group, which can lead to disulfide formation.

Procurement from Reliable Suppliers

For researchers and manufacturers needing to buy 5-Amino-3H-1,3-thiazole-2-thione, it is imperative to source from reputable suppliers or manufacturers. Companies with established quality control systems and transparent practices, particularly those specializing in pharmaceutical intermediates and fine chemicals, are ideal. When inquiring about this product, always ask for the most up-to-date Certificate of Analysis (CoA) and Safety Data Sheet (SDS). Comparing prices from various manufacturers in regions like China can help secure cost-effective solutions without compromising on quality.

By understanding and implementing these guidelines, laboratories and production facilities can safely and effectively utilize 5-Amino-3H-1,3-thiazole-2-thione, ensuring successful outcomes in their chemical synthesis endeavors.