IRDC6-10G: IR Fluorescent Phosphor 10 Grams $276.75 each + – Add to cart The add to cart button will appear once you select the values above Contact us for more information Excitation (absorption) frequencies: 465nm Emission (fluorescence) frequencies: primary between 550nm to 650nm. Average Particle Size: 5 Microns Solubility: None Type: Proprietary inorganic Blue Wool: 8 or higher Long Term Stability: Very high Visible Appearance: Pale yellow