Overview
Guanidine iodide is an organic salt derived from guanidine and hydrogen iodide. It is primarily utilized in chemical synthesis and specialized industrial applications due to its strong reducing properties and solubility in polar solvents. The compound is commercially available in crystalline powder form, often with purities exceeding 98% for technical and pharmaceutical grades. In recent years, guanidine iodide has gained attention in materials science, particularly in the fabrication of perovskite solar cells, where it serves as an additive to improve device efficiency. Its versatility in organic reactions also makes it valuable for producing nitrogen-containing compounds.
Physical and Chemical Properties
Guanidine iodide appears as a white to off-white crystalline solid with high hygroscopicity, requiring careful storage to prevent moisture absorption. It decomposes at temperatures near 300°C without a distinct boiling point. The compound exhibits excellent solubility in water and polar solvents like methanol and ethanol, facilitating its use in solution-based processes. Chemically, it acts as a potent reducing agent and can participate in nucleophilic substitution reactions. Its stability under ambient conditions is moderate, but prolonged exposure to light or humidity may degrade its performance. Analytical techniques such as HPLC and titration are commonly employed to assess its purity.
Main Applications
In pharmaceuticals, guanidine iodide serves as an intermediate for synthesizing antimicrobial and antiviral agents. Its iodine content makes it useful in radiolabeling and contrast media production. The electronics industry employs it in perovskite solar cells to passivate defects and enhance charge transport, significantly boosting photovoltaic efficiency. Additionally, it finds niche applications in organic synthesis, particularly in the preparation of guanidine derivatives and catalysts. Research laboratories value it for its role in studying reaction mechanisms involving iodine-based redox systems. Industrial-scale procurement often focuses on high-purity grades to meet stringent regulatory requirements.
Safety and Storage
Guanidine iodide requires cautious handling due to its irritant properties. Direct contact with skin or eyes can cause inflammation, necessitating the use of gloves, goggles, and lab coats. Work areas should be equipped with local exhaust ventilation to minimize inhalation risks. Storage recommendations include airtight containers in cool (below 25°C), dry environments, preferably with desiccants to prevent moisture uptake. Incompatible materials include strong oxidizers and acids, which may trigger hazardous reactions. Spills should be neutralized with appropriate absorbents and disposed of following local regulations for halogenated waste.
B2B Procurement Guide
When sourcing guanidine iodide, prioritize suppliers with ISO or GMP certifications to ensure consistent quality. Key specifications to verify include purity (typically 98-99.5%), heavy metal content (<10 ppm), and residual solvent levels. Bulk purchases (25 kg drums or larger) often offer cost advantages, with prices influenced by market demand for iodine derivatives. Request certificates of analysis (CoA) and material safety data sheets (MSDS) for compliance tracking. For specialized applications like photovoltaics, consider custom synthesis options to optimize particle size and reactivity. Lead times may vary due to the compound's niche production scale, so advance planning is advisable.