Fluorescent brightener 71

Product Details

CasNo： 16090-02-1

MF： C40H38N12Na2O8S2

Appearance： Granule

Delivery Time： 15 days

Packing： 25kg/bag

Purity： 65%

1. Basic Information

• English Name: Disodium 4,4'-bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonate; Fluorescent Brightener 71
• Chinese Aliases: 荧光增白剂 CXT; 荧光增白剂 71; 荧光增白剂 DCP; 荧光增白剂 MD
• CAS Number: 16090-02-1
• Molecular Formula: C₄₀H₃₈N₁₂Na₂O₈S₂
• Molecular Weight: 924.92 g/mol (rounded to two decimal places)
• Appearance: Light yellow to white solid (powder or granular form, with uniform particle size and no visible impurities in high-quality products)
• Pigment Index Number: C.I. Fluorescent Brightener 71 (CI 71)

2. Physical and Chemical Properties

3. Key Performance Characteristics

1. Efficient Whitening and Brightening
   The stilbene core structure of the product enables strong ultraviolet absorption and cyan fluorescence emission, which can:

• Compensate for the yellowish hue of substrates (e.g., cotton, paper, detergents) by emitting visible light, increasing whiteness by 15%–30% (vs. untreated substrates).
• Enhance the "brightness" of colored products (e.g., light-colored textiles) by increasing light reflection, making colors more vivid without altering the original hue.

1. Broad Compatibility and Process Adaptability

• As an anionic brightener, it is fully compatible with anionic/non-ionic ingredients in detergents and textile auxiliaries, with no adverse reactions (e.g., sedimentation, viscosity changes) in formulations.
• Tolerates common processing conditions: stable at 60–120°C (suitable for high-temperature dyeing of textiles and detergent spray drying) and resistant to moderate concentrations of salts (e.g., NaCl, Na₂SO₄) in dyeing baths.

1. Good Durability and Environmental Stability

• Wash Fastness: For textiles treated with this product, the whiteness retention rate is >85% after 10 washes (per ISO 105-C10), outperforming low-cost brighteners.
• Biodegradability: Meets EU ECOLABEL requirements, with a 28-day biodegradation rate of ≥60% (OECD 301B), reducing environmental accumulation risks compared to non-biodegradable brighteners.

4. Main Application Fields

1. Detergent Industry (Core Scenario)

2. Textile Industry

• Natural Fibers (cotton, linen): Added at 0.1%–0.3% in dyeing baths, it enhances the whiteness of finished fabrics, suitable for bed sheets, clothing, and home textiles.
• Synthetic Fibers (polyamide, vinylon): Improves the "dullness" of synthetic fibers, making them look brighter; compatible with high-temperature dyeing processes (100–110°C).
• Blended Fibers (cotton-polyester): Provides uniform brightening without causing color differences between fiber components.

3. Paper and Plastic Industries

• Paper: Added at 0.05%–0.1% in papermaking pulp, it brightens white paper (e.g., copy paper, tissue) and improves printability by reducing yellowing.
• Plastics: Used in white plastics (e.g., PP, PE) at 0.02%–0.05%, enhancing surface whiteness without affecting plastic processing properties (e.g., melt flow rate).

5. Usage Guidelines & Safety

1. Usage Recommendations

• Dosing Method: For solid products, first prepare a 10% hot water (60–80°C) suspension with stirring, then add it to the formulation to avoid agglomeration; for liquid detergents, dissolve directly in warm water (40–50°C) before mixing.
• Avoid Overdosing: Excessive addition (>0.5%) may cause "blueing" of substrates (excessive cyan fluorescence) or reduced solubility.

2. Safety & Regulatory Compliance

• Toxicity: Acute oral LD₅₀ (rat) >5,000 mg/kg (low toxicity); skin irritation test (OECD 404) score ≤0.2 (10-point scale), no sensitization, suitable for contact with skin and food-contact paper/plastics.
• Regulatory Compliance: Meets EU REACH registration, US FDA 21 CFR §178.3297 (for food-contact materials), and China GB 19601-2013 (Safety Standard for Fluorescent Brighteners in Detergents).

3. Packaging & Storage

• Packaging: 1 kg/bag (inner polyethylene film, outer aluminum foil bag) for small batches; 25 kg/bag (inner polyethylene vacuum bag, outer kraft paper composite bag) for bulk orders; customizable packaging available.
• Storage: Store in a cool, dry, well-ventilated warehouse (temperature 5–30°C, relative humidity <65%); avoid direct sunlight and moisture. Unopened products have a shelf life of 24 months.