Calcium Fluoride Window from Germany
An unmounted flat optical window made of calcium fluoride (CaF2) for infrared spectroscopy and laser systems. Falls under HTS 9001.90.90.00 as a non-glass optical element transmitting in UV-IR spectrum. Used unprotected in optical paths requiring high purity.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• Supply transmission curve data proving IR/UV optical properties to avoid Chapter 69 ceramic classification
• Document scratch-dig specifications (e.g
• 40-20) confirming optical workmanship standards
• For AR-coated versions, verify if coating changes classification to mounted assemblies