Chapter 21 covers miscellaneous edible preparations, including coffee, tea, cocoa, spices, yeast, baking powder, sauces, soups, ice cream, etc. These goods are usually directly for consumption or used in food processing, but differ from the primary agricultural products or simply processed goods of Chapters 1-20. The goods in this chapter are mostly complex processed or formulated foods. Active yeast, as a leavening agent, is widely used in baking and brewing and is an important raw material in the food industry, and is therefore classified under Chapter 21. Heading 2102 includes active yeasts, inactive yeasts, other single-cell micro-organisms, and prepared baking powders. Active yeast refers to yeast that has metabolic activity and can cause fermentation, such as Saccharomyces cerevisiae and baker's yeast. Inactive yeast refers to yeast that has lost its activity, often used as a nutritional supplement or flavoring. Baking powder is a chemical leavening agent and is also classified under this heading. This heading distinguishes the active state of yeast because active yeast has biological activity and requires specific storage conditions, while inactive yeast does not have such requirements. The first 2 digits 21: indicates Chapter 21, miscellaneous edible preparations. Digits 3-4, 02: indicates heading 2102, covering active yeasts, inactive yeasts, other single-cell micro-organisms, and prepared baking powders. Digits 5-6, 10: subheading 210210, specifically referring to active yeasts. Therefore, the complete meaning of 210210 is: active yeasts under Chapter 21, miscellaneous edible preparations. Active yeast must maintain biological activity and is used in fermentation processes, such as bread making and beer brewing. Active yeast is classified under 210210 because it has fermentation activity and belongs to heading 2102. If the yeast has lost its activity, it is classified under 210220 (inactive yeasts). If it is a chemical leavening agent such as baking powder, it is classified under 210230 (prepared baking powders). The core difference between active yeast and these goods lies in its biological activity and use, and therefore it is listed under a separate subheading.

Product name: The specific name of the declared goods, such as "active dry yeast" or "active fresh yeast", which must be consistent with the actual goods. Brand: Fill in the brand or manufacturer name of the yeast; if there is no brand, write "none". Packaging specifications: Indicate the packaging form and net weight, such as "500g/bag, 20 bags/carton". Yeast strain: Indicate the scientific name or trade name of the yeast, such as "Saccharomyces cerevisiae". Activity state: Clearly declare as "active" or "inactive"; active yeast must meet storage conditions. Use: Explain the main use, such as "bread fermentation" or "beer brewing". Ingredient content: List the main ingredients and percentages, such as "yeast >= 99%, moisture <= 5%". Production date/shelf life: Provide the production date and shelf life; active yeast must be within its shelf life. Product name: active dry yeast; Brand: XX; Packaging specifications: 500g/bag, 20 bags/carton; Yeast strain: Saccharomyces cerevisiae; Activity state: active; Use: bread fermentation; Ingredient content: yeast >= 99%, moisture <= 5%; Production date: 2025-01-01; Shelf life: 24 months. Incorrectly declaring inactive yeast (such as yeast extract) as active yeast, resulting in classification errors. Failing to provide yeast strain information, affecting customs determination of active yeast. Unclear packaging specification description, such as only writing "bagged" without indicating net weight and number of packages.

The core basis for classification is the activity state of the yeast. Active yeast has fermentation ability and is used for dough fermentation or brewing, and is classified under 210210. Inactive yeast has lost its activity and is often used as a nutritional additive or flavoring, and is classified under 210220. Baking powder is a chemical leavening agent and is classified under 210230. If yeast is mixed with other substances to make baking powder, it is classified as baking powder. In addition, active yeast must meet the definition of active yeast in the Tariff, that is, having metabolic activity and being able to cause fermentation. 210220 Inactive yeasts: Inactive yeast has lost fermentation ability and is usually used as a nutritional supplement or flavoring, while active yeast has biological activity and is used in fermentation processes. 210230 Prepared baking powders: Baking powder is a chemical leavening agent, such as baking powder, and does not contain active yeast; it produces gas through chemical reactions, while active yeast produces gas through biological fermentation. 210690 Other food preparations not elsewhere specified: 210690 is a residual code. If a yeast product does not meet a specific subheading of 2102, such as mixed seasoned yeast, it may be classified here. However, pure active yeast must be classified under 210210. 300290 Other microbial cultures: 300290 includes microbial cultures for medical or scientific research. If active yeast is used for medical or scientific research, it may be classified here, but edible active yeast is classified under 210210. Confirm whether the goods are active yeast and have fermentation ability. Check whether the yeast strain is a common edible yeast such as Saccharomyces cerevisiae. Check whether the packaging and storage conditions are suitable for active yeast. Confirm whether it is mixed with other substances; if mixed, it may affect classification. Verify whether the use is food fermentation rather than medical or scientific research.

How can it be determined whether yeast is active or inactive? Active yeast has metabolic activity and can ferment sugars to produce carbon dioxide. It usually needs refrigeration or frozen storage, and the packaging will indicate "active" or "highly active". Inactive yeast has been inactivated and has no fermentation ability. It is often used as a nutritional supplement and can be stored at room temperature. Fermentation power can be confirmed through laboratory testing. How are active yeast and baking powder distinguished during customs declaration? Active yeast is a biological preparation and is classified under 210210; the strain and activity must be indicated during declaration. Baking powder is a chemical mixture, such as baking powder, and is classified under 210230; the ingredients (such as sodium bicarbonate) must be indicated during declaration. The two have similar uses but different ingredients and principles, and customs will determine based on ingredients and activity. What special documents are required for importing active yeast? Generally, contracts, invoices, packing lists, bills of lading/waybills, certificates of origin, health certificates, ingredient test reports, etc. are required. Some countries may require phytosanitary certificates. The specific requirements are subject to customs and inspection and quarantine requirements; it is recommended to consult a customs broker in advance. Is the HS code for active yeast globally uniform? The first 6 digits of the HS code, 210210, are basically the same in various countries, but the later digits may differ due to national subdivisions. For example, the U.S. HTS is 2102.10.00, and the EU is 2102.10.00. When exporting, the destination country's code must be confirmed; when importing, the Chinese customs code shall prevail. If active yeast is used for brewing, is the code different? Active yeast used for brewing is still classified under 210210 because it is essentially active yeast. However, if it is a specific alcoholic beverage fermentation agent and is mixed with other substances, it may affect classification. Generally, pure yeast cultures are all classified under 210210. In the declaration elements for active yeast, how should ingredient content be filled in? The main ingredients and contents must be filled in, such as yeast content, moisture, additives, etc. For example, "yeast >= 99%, moisture <= 5%". If additives are contained, the names and proportions must be listed. The content directly affects classification and tax rates, so it must be accurate. How should active yeast be declared for cross-border e-commerce retail? For cross-border e-commerce retail imports of active yeast, it must be declared as personal items or goods, providing order, payment, and logistics information. If through a bonded warehouse, it must be declared according to the cross-border e-commerce retail imported goods list; the HS code is still 210210, but it may enjoy preferential tax rates within the quota. Does the shelf life of active yeast affect classification? The shelf life itself does not affect classification, but expired active yeast may lose activity. If it is declared as active yeast but is actually inactive, the classification is wrong. Customs may inspect the activity. It is recommended to import within the shelf life and declare truthfully.