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Reactive Orange HeR
Reactive Orange HeR is a mono-functional, high-exhaust class reactive dye designed for dyeing and printing of cellulosic fibers, particularly cotton and viscose. It reacts covalently with hydroxyl groups on cellulose under alkaline conditions, resulting in excellent wash, light, and perspiration fastness. Known for its brilliant orange shade, Reactive Orange HeR offers high fixation efficiency, compatibility with other HE dyes, and suitability across multiple dyeing methods such as exhaust, pad-batch, and pad-dry-cure processes.
Reactive Orange HeR
Primary Uses
- Textile Dyeing Industry
- Used for dyeing cotton, viscose, lyocell, and their blends using high-exhaust methods.
- Applied in package dyeing, yarn dyeing, and fabric dyeing, especially in industries requiring brilliant and durable orange shades.
- Suitable for home textiles like towels, curtains, and bedsheets, as well as garments and uniforms requiring consistent coloration.
- Commonly used in continuous dyeing operations for large-scale production.
- Textile Printing
- Employed in rotary and flatbed screen printing for bright orange designs on natural fiber fabrics.
- Compatible with reactive printing pastes in multi-color designs requiring long-lasting color fastness.
Secondary Uses
- Custom Shade Development
- Used in formulation of reactive dye blends to create custom shades for seasonal fashion or branding requirements.
- Handcraft & Artisan Textiles
- Applied in small-batch and artisan dyeing, including batik and tie-dye, due to its vibrant hue and good reproducibility.
- Educational and Laboratory Use
- Used in academic settings for training in textile chemistry, dye performance testing, and fastness assessments.
- Blended Fabrics
- Can be used with auxiliaries to dye cotton-polyester or cotton-elastane blends, controlling migration and fixation.
1. Basic Identification Attributes
- Chemical Name (IUPAC): Varies by manufacturer; typically mono-reactive derivative of azo dyes
- Common/Trade Name: Reactive Orange HeR
- CAS Number: Proprietary/formulation-specific
- HS Code: 3204.16.00
- Synonyms: Orange HE-R; High-exhaust reactive orange; Mono-reactive orange dye
2. Physical & Chemical Properties
- Physical State: Powder or granular form
- Color & Odor: Bright orange; odorless or faint characteristic odor
- Solubility: Soluble in water
- pH Stability: Works optimally in alkaline medium (pH 10–11) during fixation
- Heat Stability: Stable at standard dyeing temperatures (up to ~80°C)
3. Safety & Hazard Attributes
- GHS Classification: May cause skin and eye irritation; avoid inhalation of dust
- Toxicity: Low toxicity when used in industrial applications
- Exposure Limits: No specific limits; handle with general chemical safety practices
4. Storage & Handling Attributes
- Storage Conditions: Store in a dry, well-ventilated area away from moisture, heat, and direct sunlight
- Container Type: Moisture-proof polyethylene-lined fiber drums or bags
- Shelf Life: 12–24 months under proper storage
- Handling Precautions: Use dust extraction and wear protective equipment during handling
5. Regulatory & Compliance Attributes
- Compliant with Oeko-Tex® Standard 100 (if specified by supplier)
- May be compliant with REACH, ZDHC MRSL, and other global textile chemical standards
- APEO- and formaldehyde-free variants may be available for sustainable dyeing processes
6. Environmental & Health Impact
- Biodegradability: Limited; requires treatment before wastewater discharge
- Ecotoxicity: Potentially harmful to aquatic organisms if discharged untreated
- Bioaccumulation: Low
- Wastewater Treatment: Requires dye removal systems (e.g., activated carbon, flocculation, or oxidation treatment)
Safety Handling Precautions
- PPE Required: Gloves, goggles, dust mask recommended
- Handling Guidelines: Avoid contact with eyes, skin, and clothing; avoid breathing dust
- Storage Measures: Keep containers tightly closed and stored in a cool, dry, and well-ventilated area
First Aid Measures
- Inhalation: Remove to fresh air; seek medical attention if symptoms appear
- Skin Contact: Wash thoroughly with soap and water; remove contaminated clothing
- Eye Contact: Rinse with plenty of water for at least 15 minutes; get medical attention if irritation persists
- Ingestion: Rinse mouth with water; do not induce vomiting; seek immediate medical help
Firefighting Measures
- Fire Hazards: Not highly flammable but may decompose at high temperatures
- Extinguishing Media: Use dry chemical, CO₂, foam, or water mist
- Special Precautions: Use protective equipment and self-contained breathing apparatus
- Hazardous Combustion Products: May release carbon monoxide, carbon dioxide, and nitrogen oxides
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