
Acid Orange 7 is a widely used azo dye with bright orange coloring properties, commonly utilized in the textile, leather, and paper industries.

Common Names
- Acid Orange 7
- CI 15510 (Color Index Number)
- Orange II
- Orange Sodium Salt
- CI Acid Orange 7
Chemical Identifiers
- CAS Number: 633-96-5
Physical and Chemical Properties Appearance
Orange powder
Solubility: Soluble in water
Melting Point: Decomposes before melting
pH: Acidic solution, typically around 3-4 in water
Applications
Used in Textiles ( wool, silk, nylon, cotton) Paper, and Leather industries.
Used as a coloring agent in temporary hair dyes
pH indicator and biological stain.
Used in laboratories for titration as a pH indicator.
Acid Orange
Acid Orange becomes a synthetic dye that is a member of the water-soluble acid dye class, which is mostly used to colour synthetic materials and protein fibres. Acid Orange, well-known for its vivid orange hues, is used extensively in a variety of sectors, such as paper, leather, textiles, and cosmetics. To provide readers a thorough grasp of this adaptable dye, this blog examines Acid Orange’s characteristics, uses, advantages, and safety issues.
Acid Orange: What is it?
The term “Acid Orange” describes a class of azo dyes distinguished by their vivid orange colour and capacity to create ionic connections with substrates. Because of their increased solubility and ability to interact with fibres and other materials, the aforementioned colours are usually utilised in acidic environments.
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Acid Orange dyes’ exceptional water solubility and affinity for particular substrates are attributed to their azo groups (-N=N-) and sulfonic acid groups (-SO3H), that are key components of their chemical structure.
Important Uses for Acid Orange
- The Textile Sector
- The Leather Sector
- The Paper Sector
- Personal Care and Cosmetics Items
- Staining by Biology
Benefits of Acid Orange
Bright and Durable Shades Acid Orange creates bold, vibrant hues that are fading-resistant, guaranteeing effects that last for a variety of applications.
Elevated Solubility Acid Orange’s water solubility makes it simple to apply and distribute evenly across a variety of surfaces.
Economically Acid Orange is an affordable dye that provides outstanding effects without sacrificing quality, meaning it’s a wise choice for businesses.
Adaptability Acid Orange is a versatile dye that may be used for a wide range of industrial applications due to its compatibility with various materials.
Considering Safety and the Environment
Although Acid Orange has several advantages, there are certain health and safety and environmental concerns when using it.
Concerns About Toxicity When produced or applied, certain types of Acid Orange can leave toxic byproducts. Long-term exposure to these byproducts can cause respiratory problems and skin irritation, among other health dangers.
Effects on the Environment The release of dye effluents without treatment entering bodies of water can damage aquatic life and pollute the water. In order to reduce environmental harm, enterprises must use appropriate wastewater treatment procedures.
Adherence to Regulations Local and international laws controlling the manufacture, use, and disposal of colours such as Acid Orange must be followed by producers and consumers. Minimal dangers to the environment and human health are ensured by adherence to safety regulations.
Sustainable Practices and Alternatives
Industries are rapidly implementing sustainable practices and looking for eco-friendly options to alleviate the environmental issues related to Acid Orange:
Natural Colours Plant-based dyes that are non-toxic and biodegradable, such turmeric and annatto, can provide orange hues that are comparable.
Reusing and Recycling Cutting waste and the environmental impact of dyeing operations, advanced technologies allow dye effluents to be recycled and reused.
By using green chemistry concepts to generate eco-friendly synthetic dyes, hazardous material emissions are reduced and sustainable production is encouraged.