2931 90 90 10

Code

2931 90 90 10

Type

10-digit tariff line

Duty rate

3.7% (set at subheading 29319090)

Unit

kg

Classification rulings (U.S. Customs, CROSS)

• N331968 · 2023-04-11 — The tariff classification of Trimethylsilane (CAS # 993-07-7) and Tetramethylsilane (CAS # 75-76-3) from China

  The subject products are Trimethylsilane (CAS # 993-07-7) and Tetramethylsilane (CAS # 75-76-3) from China. The Trimethylsilane will be imported in 47L cylinders, the Tetramethylsilane will be imported in low-pressure 19L and 280L drums. Both products will be used in the manufacture of semiconductors. The applicable subheading for Trimethylsilane (CAS # 993-07-7) and Tetramethylsilane (CAS # 75-76-3) will be 2931.90.9010, Harmonized Tariff Schedule of the United States (HTSUS), which provides for: Other organo-inorganic compounds: Other: Other: Organo-silicon compounds: The rate of duty will…

• N311266 · 2020-05-14 — The tariff classification of Hydrolyzed or Polymerized Alkoxysilanes or Organosilanes from Germany, China or Japan

  Item Description 1 Tetraethoxysilane polymerized, also known as Ethyl Silicate 40, CAS No. 11099-06-2, chemical structure of CH3-CH2-[O-Si(-O-CH2-CH3)2]n-O-CH2-CH3; (n = 4-5) Item Description 2 Triethoxymethylsilane polymerized, CAS No. 67762-97-4, chemical structure of CH3-CH2-[O-Si-CH3(-O-CH2-CH3)]n-O-CH2-CH3 (n = 2.5 – 3). It is also called Oligomeric MTES in your submission. In a follow up email you indicated that the products consisted of a range (average monomer size) of monomer units as indicated above. You stated that these n – signifies the extent of polymerization and is expressed…

• N302530 · 2019-02-07 — The tariff classification of SF1173 (D4) and SF1202 (D5) from China

  The subject chemical products are as follows: SF1202 (D5) (CAS # 541-02-6) Decamethylcyclopentasiloxane SF1173 (D4) (CAS # 556-67-2) Octamethylcyclotetrasiloxane You provided specification sheets for both products. Upon our request, you provided an updated sheet showing percentages of main ingredients along with corrected percentages of other compounds indicated to be impurities. You indicated that these other ingredients are impurities left over from chemical and purification processes. Both products are indicated to be greater than 99 percent of the main ingredient. SF1202 (D5) is used as…

• 2931 90 90 21 — Organo-tin compounds: — Dibutyltin oxide
• 2931 90 90 25 — Organo-tin compounds: — Tetrabutyltin
• 2931 90 90 29 — Organo-tin compounds: — Other
• 2931 90 90 30 — 2-Chlorovinyldichloroarsine
• 2931 90 90 35 — Bis(2-chlorovinyl)chloroarsine
• 2931 90 90 40 — Tris(2-chlorovinyl)arsine
• 2931 90 90 52 — Other

• 29319 — ТН ВЭД ЕАЭС: прочие:
• 293190 — EU CN/TARIC: Other

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