Tetraethylorthosilicate from Germany
Tetraethylorthosilicate (Si(OC2H5)4), also known as TEOS, is an organo-silicon compound used in sol-gel processes and chemical vapor deposition. It falls under HTS 2931.90.90.10 as a separate chemically defined organo-inorganic compound with silicon-carbon/oxygen linkages.
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
• Include hydrolysis stability data; stabilizers must qualify under Chapter 29 note (f) to avoid reclassification
• Declare CAS 78-10-4 and provide flash point/moisture sensitivity info for proper hazmat handling