9902.05.77 - Creatinine (2-amino-1-methyl-1,5-dihydro-4H-imidazol-4-one) (CAS No. 60-27-5) (provided for in subheading 2933.29.90)

This HTS classification, 9902.05.77, specifically covers creatinine (2-amino-1-methyl-1,5-dihydro-4H-imidazol-4-one), identified by CAS No. 60-27-5. It's important to note that while this subheading falls under Chapter 99, which generally pertains to temporary legislation and special provisions, the description explicitly states that creatinine is "provided for in subheading 2933.29.90." This indicates that for general tariff purposes, creatinine is classified under the more specific provisions for heterocyclic compounds containing an unfused imidazole ring. The presence of this entry in Chapter 99 likely signifies a temporary modification or a specific import restriction that applies to creatinine under certain circumstances, rather than its primary classification.

Given that this is a leaf node, there are no further subcategories under 9902.05.77. Its distinction from sibling categories is inherent to its placement within Chapter 99. Sibling categories within Chapter 99 would generally represent other temporary measures, trade agreement modifications, or Section 22 restrictions on various goods. This specific subheading is distinct because it targets creatinine by its chemical name and CAS number, implying a focused regulatory action related to this particular substance, which is otherwise classified in Chapter 29.

The purpose of this classification within the HTS is to delineate specific import requirements or limitations that may be enacted under temporary legislation or trade policy. Users encountering this subheading should cross-reference the primary classification in Chapter 29, specifically subheading 2933.29.90, and consult the relevant legal notes or regulations associated with Chapter 99 for complete understanding of any applicable duties, quotas, or prohibitions.