9902.01.32-Entirely spherical silicon dioxide micro-spheres, certified

Harmonized Tariff Schedule (2025 HTS Revision 32 (12/05/2025))

HTS Code	9902.01.32
Article Description	Entirely spherical silicon dioxide micro-spheres, certified by the importer as having mean particle size of 3 to 18 micrometers (µm), linseed oil absorption 150 to 400 ml/g, microbial count less than 100 cfu/g, mold count less than 100 cfu/g, heavy metals less than 20 ppm, surface area 300 to 800 m²/g and pore volume of 0.8 to 2.5 ml/g (CAS No. 7631-86-9) (provided for in subheading 2811.22.10)
Quota of Quantity
Unit of Quantity	[]
Rates of Duty (1-General)	Free
Rates of Duty (1-Special)	No change
Rates of Duty (2-Cuba and North Korea)	No change
Footnotes	[{columns=[stat, units], marker=1, value=See chapter 99 statistical note 1., type=footnote}]
Additional Duty
Additional Duty(products of China)

Section XXII:	Special Classification Provisions; Temporary Legislation; Temporary Modifications Proclaimed pursuant to Trade Agreements Legislation; Additional Import Restrictions Proclaimed Pursuant to Section 22 of the Agricultural Adjustment Act, As Amended
Chapter 99	Temporary legislation; temporary modifications proclaimed pursuant to trade agreements legislation; additional import restrictions proclaimed pursuant to section 22 of the Agricultural Adjustment Act, as amended
Subheading 9902.01.32	Entirely spherical silicon dioxide micro-spheres, certified by the importer as having mean particle size of 3 to 18 micrometers (µm), linseed oil absorption 150 to 400 ml/g, microbial count less than 100 cfu/g, mold count less than 100 cfu/g, heavy metals less than 20 ppm, surface area 300 to 800 m²/g and pore volume of 0.8 to 2.5 ml/g (CAS No. 7631-86-9) (provided for in subheading 2811.22.10)