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Acid Orange 7, also known as Orange II (Chemical Index 15510), is a synthetic organic dye belonging to the azo dye family. Its molecular formula is C16H11N2NaO4S, and it appears as a bright orange powder. Below are key details about Acid Orange 7:
Class: Azo dye (contains one or more azo groups, -N=N-, which are responsible for its vibrant color).
Functional Groups: Sodium sulfonate group (-SO3Na), hydroxyl group (-OH), and aromatic rings.
Color: Bright orange in solution.
Solubility: Soluble in water, producing an intense orange color.
Stability: Stable under normal conditions but sensitive to strong acids and bases.
Acid Orange 7, also known as Orange II (C.I. 15510), is a synthetic azo dye primarily used in various industrial and scientific applications. Its applications include:
Textile Industry
Commonly used to dye silk, wool, and nylon fibers.
Provides vibrant orange shades with good lightfastness.
Leather Dyeing
Used for coloring leather materials due to its strong binding properties.
Paper Industry
Utilized for paper dyeing to produce orange-tinted papers.
Cosmetics
Occasionally employed in formulations like shampoos and bath products for colorant purposes.
Food Industry (limited use)
In some regions, it is used as a food dye under strict regulations, though its use has been restricted or banned in many countries due to safety concerns.
Biological and Chemical Research
Acts as a pH indicator, changing color depending on the acidity or alkalinity of a solution.
Used as a staining agent in histology and microscopy.
Employed in studies of photodegradation and dye-sensitized reactions.
Environmental Studies
Frequently studied as a pollutant in wastewater treatment research, particularly in azo dye degradation and adsorption studies.
Ink Production
Used as a pigment in ink formulations for vibrant orange tones.
While Acid Orange 7 has diverse applications, its use has raised environmental and health concerns, leading to strict regulations and the search for biodegradable alternatives in some industries.
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