9902.03.42 - Tris(2,4-di-tert-butylphenyl) phosphite (CAS No. 31570-04-4) (provided for in subheading 2920.90.20)

This HTS category, 9902.03.42, is a specific provision within Chapter 99, which covers temporary legislation and modifications. It identifies Tris(2,4-di-tert-butylphenyl) phosphite, also known by its CAS Number 31570-04-4. While the chemical itself is classified under subheading 2920.90.20, this particular entry in Chapter 99 signifies a special treatment or restriction applied to this substance, likely related to trade agreements or specific import regulations.

As a leaf node within Chapter 99, this category does not have further subdivisions. Its purpose is to isolate and potentially modify the treatment of Tris(2,4-di-tert-butylphenyl) phosphite from other temporary provisions or general classifications within Chapter 99. Unlike the broad categories in earlier chapters that classify goods by material or function (e.g., live animals, machinery), this provision is highly specific, targeting a single chemical compound for particular customs handling. The significance of this entry lies in its potential to override or supplement the standard classification found elsewhere in the HTS, necessitating careful review of all applicable provisions.