GLS433 Visible Light Absorbing Dye – 433nm Peak for Blue Laser Blocking and Precision Notch Filters

GLS433 is a high‑efficiency violet‑blue light absorber with sharp peak at 433nm. It offers broad solvent compatibility, high stability, and strong light absorption, widely used in anti‑counterfeiting, optical filters, display materials, and transparent plastics.

Peak absorption wavelength: 433nm ± 2nm – optimized for blue light attenuation
Bright yellow powder appearance
Broad solvent compatibility: soluble in DMF, MC, TCM, MA, and ethanol
Insoluble in acetone – enables selective dissolution and processing
High optical density at low concentrations
Narrow absorption band for clean notch filter design
Good photostability and thermal stability
Compatible with various resin systems and polymer matrices

Typical Specifications

Absorption λmax: 433±2nm (in MC)
Appearance: Bright yellow powder
Solubility: Soluble in DMF, MC, TCM, MA, EtOH; insoluble in acetone (AC)
Thermal stability：Good for standard processing

Applications

Anti-Counterfeiting Ink & Security Printing

Delivers stable 433nm absorption for covert markings, currency, and high‑value packaging.

Optical Filters & Display Materials

Improves contrast and color purity in displays, lenses, and optical films.

Transparent Plastic Coloring

Compatible with PC, PMMA, and PET for optical‑grade transparent coloration.

Photosensitive & Imaging Systems

Used in imaging materials, lithography, and optical detection equipment.

Frequently Asked Questions (FAQ)

Q: What is the advantage of GLS433‘s selective solubility in acetone?

A: The fact that GLS433 is soluble in many organic solvents but insoluble in acetone (AC) allows formulators to use acetone as a non-solvent for precipitation or purification steps, providing additional processing flexibility

Q: Does GLS433 block 445nm blue lasers effectively?

A: Yes. With peak absorption at 433nm, GLS433 provides strong absorption at 445nm (approximately 75–80% of peak efficiency), making it effective for 445nm blue laser protection.

Q: Can GLS433 be used in polycarbonate?

A: Yes. GLS433 is compatible with polycarbonate and other common thermoplastics. For best results, pre-disperse in a compatible carrier resin before compounding.

Q: What is the shelf life?

A: 24 months when stored in a cool, dry place (<30°C, <60% RH) in the original sealed, light-protected container.

Q: Is GLS433 suitable for high-temperature processing?

A: GLS433 exhibits good thermal stability for standard plastics processing and coating applications. For specific high-temperature requirements, please contact our technical team.

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