In applications ranging from display protection to optical sensing, blue light absorber dyes are essential for selectively filtering out harmful short-wavelength light. Among these, Blue Light Absorber Dye UV402 stands out for its sharp absorption peak and wide processing compatibility. As a leading wholesale supplier, Topwell Dyes offers high-purity UV402 with stable batch quality, free samples, and technical guidance to help your formulation succeed.
What is Blue Light Absorber Dye UV402?
Blue Light Absorber Dye UV402 is an organic dye engineered to strongly absorb blue light while transmitting longer visible wavelengths. It typically appears as a dark red or reddish-brown powder. Its core function is to suppress the transmission of high-energy blue light (especially around 402 nm), making it a key component in:
- Blue-light blocking coatings
- Optical filters and films
- LED encapsulation materials
- Protective polymer sheets
Unlike inorganic UV/blue absorbers, UV402 can be dissolved in a variety of organic solvents, enabling uniform dispersion in transparent matrices without significant haze or scattering.
Key Properties and Technical Data
| Property | Typical Value |
|---|---|
| Appearance | Dark red powder |
| Maximum Absorption Wavelength (λmax) | 402 nm |
| Solubility | MA, EtOH, EGE, MC, TCM (customized formulations available) |
| Thermal Stability | Contact for detailed TGA data |
| Recommended Use Concentration | 0.005% – 0.5% (depending on matrix & film thickness) |
| Storage | Keep in a cool, dry, dark place |
The absorption peak at 402 nm enables UV401 to precisely target the most energetic portion of the visible blue-light spectrum, providing effective attenuation for applications that require selective light filtering.
Did You Know? MA (Methyl Acetate), EtOH (Ethanol), EGE (Ethylene Glycol Monomethyl Ether), MC (Methyl Cellosolve/Methylene Chloride – consult SDS for safe handling), and TCM (Trichloromethane) are all capable of dissolving UV402, giving you flexible processing options. Always evaluate solvent compatibility with your final substrate.
Applications of Blue Light Absorber Dye UV402
1. Screen and Display Coatings
UV402 is widely used in protective films for monitors, smartphones, and tablets. By filtering blue light around 402 nm, it helps reduce eye strain without heavily tinting the screen.
2. Optical Films and Filters
In spectral filtering, UV402 can be incorporated into polymeric films (e.g., PET, PC, acrylic) to create precise band-stop filters for sensors, cameras, and scientific instruments.
3. LED Encapsulation
Blue-pumped white LEDs emit a strong blue peak around 450 nm. Adding a small amount of UV402 to the encapsulant can soften the blue light output and improve the light quality for human-centric lighting.
4. Protective Packaging
Certain food, pharmaceutical, and electronic products degrade under blue light. Incorporating UV402 into packaging materials can extend shelf life and maintain product integrity.
5. Laser and Science Demonstrations
UV402 can be used in fluid solutions to demonstrate selective absorption in educational optics kits.
Why Choose UV402 from Topwell Dyes?
- Manufacturer Direct Supply – Competitive pricing with consistent, documented quality.
- High Purity & Stabilized Formulation – Minimizes color drift and maintains absorption performance over time.
- Flexible Solvent Compatibility – Dissolves in MA, EtOH, EGE, MC, TCM, which simplifies formulation integration.
- Free Sample for Testing – We encourage real-world validation; request a sample to test in your own system.
- Technical Expertise – Our team can assist with loading levels, solvent selection, and compatibility testing.
Technical Support & Usage Guidelines
- Pre-dissolution: UV402 is best pre-dissolved in a compatible solvent (e.g., ethanol or MA) before blending into the main resin system.
- Concentration Screening: Start with 0.01% by weight of total formulation and adjust based on desired optical density.
- Compatibility Check: Test in your actual polymer or coating system to ensure no agglomeration or color shift.
- Safety: Refer to the Safety Data Sheet (SDS) for handling instructions, especially when using volatile solvents like TCM or MC.
Frequently Asked Questions (FAQ)
Q1: What is the absorption wavelength of UV402?
A: UV402 has a maximum absorption at approximately 402 nm, making it highly effective at targeting high-energy blue light.
Q2: Which solvents can dissolve UV402?
A: It is soluble in MA, EtOH, EGE, MC, and TCM. Other solvents may also work; please contact us for recommendations.
Q3: Is UV402 compatible with acrylic or epoxy resins?
A: In general, yes. However, we always recommend a small-scale compatibility test with your exact resin grade and curing conditions.
Q4: Can I get a free sample?
A: Absolutely. Topwell Dyes provides free samples for evaluation. Contact us with your application details.
Q5: What is the shelf life of UV402?
A: When stored in a cool, dry, and dark place in its original sealed container, UV402 remains stable for at least 12 months.
Contact Us for UV402 Blue Light Absorber Dye
If you are looking for a reliable blue light absorber dye UV401 wholesale supplier, Topwell Dyes is ready to support your project with high-quality product, free samples, and technical data. Please fill out the form below or email us directly.
Post time: Jul-24-2026