Overview
Tiron is an organic compound that serves as a specialized reagent in analytical chemistry, particularly for the detection and quantification of metal ions. Its chemical name is 4,5-dihydroxy-1,3-benzenedisulfonic acid disodium salt, and it's recognized for its ability to form stable, colored complexes with various metal cations. First developed in the early 20th century, Tiron has become particularly valuable for its selectivity towards certain metal ions, especially in spectrophotometric analyses. The reagent's disulfonate groups enhance its water solubility, making it particularly useful in aqueous analytical systems.
Physical and Chemical Properties
Tiron appears as a white to off-white crystalline powder with good stability under proper storage conditions. Its molecular structure contains two hydroxyl groups and two sulfonate groups, which contribute to its metal-chelating capabilities and water solubility. The compound is thermally stable up to 300°C, beyond which it decomposes rather than melting. In solution, Tiron exhibits pH-dependent behavior, with optimal metal chelation typically occurring in slightly acidic to neutral conditions (pH 5-7). The reagent forms distinct colored complexes with different metal ions, enabling visual and spectrophotometric detection.
Main Applications
The primary use of Tiron is in analytical chemistry for the detection and quantification of metal ions, particularly iron (Fe³⁺), titanium (Ti⁴⁺), and aluminum (Al³⁺). It forms stable, colored complexes with these metals that can be measured spectrophotometrically. In water treatment applications, Tiron serves as a chelating agent to remove heavy metals from wastewater. The photography industry utilizes it as a developing agent due to its reducing properties. Additionally, it finds use in biochemical research for studying metal-protein interactions and in industrial processes where selective metal binding is required.
Safety and Storage
Tiron is generally considered a moderate health hazard, primarily causing irritation to skin, eyes, and respiratory system upon contact. Appropriate personal protective equipment including gloves and safety goggles should be worn when handling this chemical. For long-term storage, keep Tiron in its original tightly sealed container in a cool, dry place away from direct sunlight and moisture. The compound is stable under normal storage conditions but may degrade if exposed to extreme heat or humidity over extended periods. In case of spills, clean immediately with plenty of water and proper protective measures.
B2B Procurement Guide
When procuring Tiron for industrial or laboratory use, specify the required purity grade (typically analytical reagent grade for most applications). Verify the CAS number (149-45-1) to ensure you're obtaining the correct compound. Consider packaging options based on your usage volume - Tiron is commonly available in quantities ranging from 25g to 25kg. Request certificates of analysis for quality assurance. For large-scale purchases, inquire about bulk pricing and potential discounts. Always confirm the manufacturer's quality control procedures and compliance with relevant industry standards.
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