Overview
Tetrabromotetrachlorofluorescein Sodium, commonly known as Acid Red 92, is a synthetic xanthene dye with vibrant red coloration. It belongs to the fluorescein dye family and is chemically modified with bromine and chlorine atoms to enhance its stability and dyeing properties. The compound is widely recognized for its intense color and versatility in various industrial applications. Initially developed for textile dyeing, this compound has found expanded use in biological staining and as a pH indicator due to its distinct color changes under different acidity levels. Its synthetic nature allows for consistent quality and performance, making it a preferred choice for manufacturers requiring reliable colorants.
Physical and Chemical Properties
Tetrabromotetrachlorofluorescein Sodium appears as a red to dark red crystalline powder with high solubility in water and ethanol. The compound exhibits strong lightfastness and resistance to fading, making it suitable for applications requiring long-term color stability. Its molecular structure includes four bromine and four chlorine atoms, contributing to its enhanced chemical robustness. The dye demonstrates pH-sensitive behavior, transitioning from red in acidic conditions to orange-yellow in alkaline environments. This property is particularly valuable in laboratory settings for pH determination. Thermal stability is moderate, with decomposition occurring above 300°C, which limits its use in high-temperature processes.
Main Applications
The primary use of Tetrabromotetrachlorofluorescein Sodium is in the textile industry as a dye for synthetic fibers, particularly where bright red hues are required. Its excellent affinity for fabrics and resistance to washing make it ideal for clothing and upholstery applications. The compound is also employed in paper coloring and ink formulations. In biological laboratories, it serves as a staining agent for microscopic analysis due to its ability to bind with specific cellular components. Additionally, its pH-sensitive nature makes it useful as an indicator in titration experiments. Some specialized applications include use in laser dyes and optical brighteners, though these are less common.
Safety and Storage
While not classified as highly toxic, Tetrabromotetrachlorofluorescein Sodium requires careful handling to avoid potential health risks. Prolonged skin contact may cause irritation, and inhalation of powder should be prevented through proper ventilation or personal protective equipment. Eye protection is recommended when handling the concentrated form. Storage conditions significantly impact the compound's shelf life. It should be kept in tightly sealed containers, protected from moisture and direct sunlight. Ideal storage temperatures range between 15-25°C. Bulk quantities should be stored in designated chemical storage areas with appropriate fire protection measures due to the organic nature of the compound.
B2B Procurement Guide
When procuring Tetrabromotetrachlorofluorescein Sodium for industrial or laboratory use, several factors should be considered. Purity levels typically range from 85% for industrial applications to 95% or higher for laboratory-grade material. Buyers should request certificates of analysis to verify composition and impurity profiles. Supplier reliability is crucial, with preference given to manufacturers with ISO certification or equivalent quality management systems. Packaging options vary from small 100g bottles to 25kg drums, with price breaks available for bulk purchases. Lead times may vary depending on production schedules, so advance planning is recommended for large orders. Some suppliers offer customized formulations for specific applications, which may require minimum order quantities.
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