{"topic_id":"additive_crosswalk_l_threonine","category":"additive-crosswalk","context":"---\ntopic_id: additive_crosswalk_l_threonine\ncategory: additive-crosswalk\ntitle: \"L-苏氨酸 — additive cross-jurisdiction identity (CN 公告2045 / EU Reg 1831/2003 / AAFCO 2024)\"\nlang: en\nsource: \"CN 农业部公告第2045号 饲料添加剂品种目录 (first-hand); EU Feed Additives Register (EU Food & Feed Information Portal; first-hand-derived parse pdf-parsed/eu_feed_additives_2023_1813.json); AAFCO Official Publication 2024 Ch.6 (first-hand); FDA EAFUS Substances Added to Food (first-hand). Derived crosswalk; each cell traced to the named source entry.\"\nsource_file: pdf-raw/cn-law/cn_feed_additive_dir_ann2045_fujian_compile.normalized.txt ; pdf-raw/eu-2026/additives/eu_l_threonine.html ; pdf-parsed/us-2026/aafco_ch6_2024_parsed.json ; pdf-parsed/eu_feed_additives_2023_1813.json ; pdf-raw/eu/eu_ffp_feed_additives_policy_items_2026-08-11.json ; pdf-parsed/ca_cfit_ingredients.json\nsource_type: government_regulation\ndate_parsed: 2026-08-07\ntokens_estimated: 600\nverification: {method: derived_from_dataset, claims: 7, passed: 7, date: 2026-08-08}\ncitation:\n  authority: \"MARA 公告 2045 (CN) / EU Feed Additives Register — EU Food & Feed Information Portal (EU) / AAFCO (US) / FDA EAFUS (US)\"\n  title: \"L-苏氨酸 — additive cross-jurisdiction identity\"\n  url: \"https://ec.europa.eu/food/food-feed-portal/screen/feed-additives/\"\n  source: [\"https://www.aafco.org/\", \"http://www.moa.gov.cn/\"]\n  retrieved: \"2026-08-07\"\n  ref: \"Each jurisdiction's name/authorisation is quoted from the first-hand source; the crosswalk verdict is a derived comparison anchored on substance identity, not a claim of regulatory equivalence. EU cell quotes the E-number and additive name verbatim from the parsed EU Feed Additives Register dataset (pdf-parsed/eu_feed_additives_2023_1813.json).\"\n  doc_type: \"derived crosswalk of first-hand regulations (public domain)\"\n  needs_review: false\nauthority_tier: T1\nauthority_tier_basis: \"T1: derived from T1 first-hand government regulations (CN/EU/AAFCO)\"\nauthority_tier_date: 2026-08-07\n---\n\n# L-苏氨酸 — additive cross-jurisdiction identity\n\nDerived crosswalk of how one feed additive is named and authorised across three jurisdictions. **No claim of regulatory equivalence is made** — pairings are anchored on the substance identity, and the verdict states where the definitions actually diverge.\n\n- **Substance anchor:** L-苏氨酸\n- **Verdict:** `closest_with_differences`\n\n## Per-jurisdiction entry\n\n| 法域 | 名称 / 编号 | 状态 / 描述 | 来源 |\n|---|---|---|---|\n| 🇨🇳 CN | 公告2045 `L-苏氨酸` | L-苏氨酸 is listed in 表一 饲料添加剂品种目录 (category 氨基酸、氨基酸盐及其类似物 for amino acids / 矿物元素及其络（螯）合物 for chelates / 维生素及类维生素 for vitamins), scope 养殖动物 (all livestock and poultry). | CN 公告2045 |\n| 🇪🇺 EU | Feed Additives Register `3c410` | L-threonine produced by fermentation with Escherichia coli CGMCC 7.232 — functional category `3 c`. Authorised in the EU feed additives register (first-hand-derived parse of the EU Food & Feed Information Portal register). Cross-jurisdiction note: this EU authorisation is quoted from the register and is not asserted to be equivalent to the CN 公告 2045 / FDA EAFUS entries (definitions, chemical form, or conditions of use may differ). EU authorises specific production-strain preparation(s); the quoted entry is a representative authorisation. | EU Food & Feed Information Portal feed-additives register; parsed dataset pdf-parsed/eu_feed_additives_2023_1813.json, e_number 3c410 |\n| 🇺🇸 AAFCO (US) | Ch.6 | No stand-alone AAFCO OP 2024 Ch.6 entry for this substance. AAFCO defines amino acids / vitamins only where a corresponding feed ingredient (often a fermentation product) is listed; where absent, the cell is an honest gap, not a claim of non-existence. | AAFCO OP 2024 Ch.6 — gap |\n| 🇨🇦 CA | Feeds Regs 2024 (CFIT) | L-Threonine — is the product that contains a minimum of 95% (2S,3R)-2-amino-3-hydroxybutanoic acid, and having the CAS# 72-19-5. It shall be labelled with a guarantee for minimum percent L-threonine. | Canadian Feed Ingredients Table (CFIT), inspection.canada.ca; SOR/2024-132; feed additive listed under Part 1 > Class 5. Nutritional ingredients > 5.1 Amino acids |\n\n## Crosswalk verdict\n\nCN 公告2045 and EU 2025/160 both authorise L-threonine for all animal species. AAFCO OP 2024 Ch.6 contains no stand-alone L-threonine (or threonine) feed-ingredient entry — AAFCO defines amino acids only where a fermentation product exists (e.g. L-lysine 36.16/36.17). Verdict: CN↔EU equivalent; AAFCO gap.\n\n\n## Species & use scope (适用范围)\n\nCross-jurisdiction species / use-scope dimension surfaced from each jurisdiction's retrieved source. CN 适用范围 is quoted verbatim from the 公告2045 饲料添加剂品种目录; EU target-species and FDA use-class reflect only what is already present in the topic's own cells (no new source fetches).\n\n- **🇨🇳 CN (公告2045 适用范围)**: 养殖动物  _(src: 农业部公告第2045号 饲料添加剂品种目录, 适用范围)_\n- **🇪🇺 EU (target species)**: All animal species.  _(src: EU Food & Feed Information Portal feed-additives register (FFP policy-items JSON, e_number 3c410); target species = authorisation feedAnimal value(s))_\n- **EU (functional category)**: `cat_func_group_3_c` — Nutritional additives (subcategory `c`).  _(src: EU Food & Feed Information Portal feed-additives register (FFP policy-items JSON, feedCategoryFunctionalGroup); category names per EU Reg 1831/2003 Annex I — pdf-raw/eu/eurlex_32003R1831_consolidated_2026-08-11.html)_\n- **🇺🇸 FDA (EAFUS use class)**: honest gap — FDA cell absent in this topic.  _(src: — gap)_\n\n## Sources\n\n- CN: 农业部公告第2045号 《饲料添加剂品种目录》 (first-hand; fujian compile txt, intra-cell line wraps normalised for verbatim quotation)\n- EU: EU Feed Additives Register (EU Food & Feed Information Portal; E-number 3c410 = L-threonine produced by fermentation with Escherichia coli CGMCC 7.232, category 3 c). First-hand-derived parse: pdf-parsed/eu_feed_additives_2023_1813.json. Target species (feedAnimal) cross-checked against FFP policy-items JSON (pdf-raw/eu/eu_ffp_feed_additives_policy_items_2026-08-11.json).\n\n- AAFCO: OP 2024 Ch.6 — no matching stand-alone entry (honest gap)","sources":["additive-crosswalk — L-苏氨酸 — additive cross-jurisdiction identity (retrieved 2026-08-07)"],"source":{"authority":"additive-crosswalk","title":"L-苏氨酸 — additive cross-jurisdiction identity","url":"https://www.aafco.org/","retrieved":"2026-08-07","ref":"","doc_type":"official PDF","source_document":"","verification_file":"pdf-raw/cn-law/cn_feed_additive_dir_ann2045_fujian_compile.normalized.txt ; pdf-raw/eu-2026/additives/eu_l_threonine.html ; pdf-parsed/us-2026/aafco_ch6_2024_parsed.json ; pdf-parsed/eu_feed_additives_2023_1813.json ; pdf-raw/eu/eu_ffp_feed_additives_policy_items_2026-08-11.json ; pdf-parsed/ca_cfit_ingredients.json"},"source_document":"","source_file":"pdf-raw/cn-law/cn_feed_additive_dir_ann2045_fujian_compile.normalized.txt ; pdf-raw/eu-2026/additives/eu_l_threonine.html ; pdf-parsed/us-2026/aafco_ch6_2024_parsed.json ; pdf-parsed/eu_feed_additives_2023_1813.json ; pdf-raw/eu/eu_ffp_feed_additives_policy_items_2026-08-11.json ; pdf-parsed/ca_cfit_ingredients.json","trust":{"authority_tier":"T1","fidelity":"verbatim","license":null,"display_grade":"A"},"tokens_estimated":600,"generated_at":null,"tip":"Use /api/v1/topics to discover more topics. /api/v1/nutrient for precise single-point queries. /api/v1/cross_compare for 2-3 standard comparisons."}