2103.30 - Mustard flour and meal and prepared mustard:

This HTS category, 2103.30, specifically encompasses mustard flour and meal, as well as prepared mustard. Mustard flour and meal are the ground seeds of the mustard plant, used as a base for various culinary applications. Prepared mustard refers to the finished product, typically a paste or sauce made from mustard seeds, vinegar, water, and other seasonings, intended for direct consumption or as a condiment.

Unlike its siblings, 2103.30 is distinct from soy sauce (2103.10) and tomato ketchup and other tomato sauces (2103.20) due to its primary ingredient and flavor profile derived from mustard seeds. It also differs from the broader "Other" category (2103.90), which covers diverse sauces and seasonings not otherwise specified.

Within this category, further distinctions are made at the six-digit level. 2103.30.20.00 covers the unmixed, ground mustard seeds (flour and meal), which are essentially ingredients. In contrast, 2103.30.40.00 is reserved for the ready-to-eat, processed forms of mustard, where the seed has been combined with other ingredients to create a distinct condiment.