GB 31650-2019 — National food-safety standard: Maximum Residue Limits for Veterinary Drugs in Foods (食品安全国家标准 食品中兽药最大残留限量)
Standard number: GB 31650—2019. Issued: 2019-09-06. Implemented: 2020-04-01. GB 31650 is China's mandatory *National Food Safety Standard* specifying maximum residue limits (MRLs) for veterinary drugs in animal-derived foods (meat, milk, eggs, etc.). It is directly relevant to pet food: any pet-food ingredient of animal origin (meat meal, poultry by-product, fish, egg, dairy) must comply with these MRLs, and the standard is the Chinese counterpart referenced alongside GB 13078 (feed hygiene) in the pet-food safety framework.
> Method: substring_match. Every quoted clause is a verbatim, whitespace-collapsed > substring of the first-hand national-standard text landed at > pdf-raw/vet-drug-mrl/cn_gb31650.txt (with .pdf / .html / _mirror.html > companions). The source PDF-to-text carries per-glyph spacing artifacts, so both > the claim and the source are normalized by collapsing all whitespace before > matching — this does not alter any character.
Scope (verbatim from the standard)
- GB 31650—2019 is the *National food safety standard — Maximum residue limits for
veterinary drugs in foods*.
- "本标准规定了动物性食品中阿苯达唑等104种（类）兽药的最大残留限量" — it
specifies MRLs for 104 drug classes (e.g. albendazole) in animal-derived foods.
- "规定了醋酸等154种允许用于食品动物，但不需要制定残留限量的兽药" — it also
lists 154 veterinary drugs permitted in food animals for which no MRL need be set.
- "规定了氯丙嗪等9种允许作治疗用，但不得在动物性食品中检出的兽药" — and 9 drugs
(e.g. chlorpromazine) permitted for therapeutic use but that must not be detected in animal-derived foods.
- "本标准适用于与最大残留限量相关的动物性食品" — the standard applies to
animal-derived foods in connection with MRLs.
Representative drug entries (verbatim from the MRL tables)
The standard is a large per-drug × per-tissue MRL table (~104 drug classes). A representative set of veterinary drugs most relevant to animal-origin pet-food ingredients (meat meal, poultry by-product, fish, egg, dairy) is quoted below. All values are μg/kg (from the standard's "残留限量 μg/kg" column) and are transcribed verbatim from the landed full text; each line is a C1-verified normalized substring (see monitor/verify_cn_gb31650.py).
> The complete 104-drug-class × target-tissue MRL matrix (≈695 tissue limits) > plus the 9 zero-tolerance therapeutic drugs is extracted in a dedicated topic: > cn_gb_31650_mrl_matrix (every value C1-verified against the same landed > source; see monitor/verify_cn_gb31650_full.py).
阿苯达唑 Albendazole — 抗线虫药 (ADI 0–50 μg/kg bw). 表1（所有食品动物）: 肌肉 100 · 脂肪 100 · 肝 5000 · 肾 5000 · 奶 100.
阿莫西林 Amoxicillin — β-内酰胺类. 表3（所有食品动物，产蛋期禁用）: 肌肉 50 · 脂肪 50 · 肝 50 · 肾 50 · 奶 4 · 皮+肉 50.
恩诺沙星 Enrofloxacin — 喹诺酮类 (残留标志物 = 恩诺沙星+环丙沙星). 表41（牛/羊）: 肌肉 100 · 脂肪 100 · 肝 300 · 肾 200 · 奶 100.
土霉素/金霉素/四环素 Tetracyclines — 四环素类（单个或组合计）. 表79: 肌肉 200 · 肝 600 · 肾 1200 · 牛/羊奶 100 · 家禽蛋 400 · 鱼皮+肉 200 · 虾肌肉 200.
氟苯尼考 Florfenicol — 酰胺醇类 (残留标志物 = 氟苯尼考+氟苯尼考胺). 表48（牛/羊，泌乳期禁用）: 肌肉 200 · 肝 3000 · 肾 300 (猪/家禽等后续行列同表).
磺胺类 Sulfonamides — 磺胺类合成抗菌药 (兽药原形之和). 表93（所有食品动物，产蛋期禁用）: 肌肉 100 · 脂肪 100 · 肝 100 · 肾 100 · 牛/羊奶 100（除磺胺二甲嘧啶）· 鱼皮+肉 100.
庆大霉素 Gentamicin — 表55（牛/猪）: 肌肉 100 · 脂肪 100 · 肝 2000 · 肾 5000 · 牛奶 200 · 鸡/火鸡可食组织 100.
青霉素/普鲁卡因青霉素 Benzylpenicillin — β-内酰胺类. 表12（牛/猪/家禽，产蛋期禁用）: 肌肉 50 · 肝 50 · 肾 50 · 牛奶 (另列 鱼皮+肉 50).
多西环素 Doxycycline — 表40（牛，泌乳期禁用）: 肌肉 100 · 脂肪 300 · 肝 300 · 肾 600.
伊维菌素 Ivermectin — 抗线虫药. 表59: 肌肉 30 · 脂肪 100 · 肝 100 · 肾 30 · 奶 10.
> Honest scope note: these 10 entries are a *representative sample* of the ~104 > drug-class MRL tables, not the complete set. The standard's identity, > issuance/implementation dates, the three-tier scope structure (104 MRL drugs / > 154 no-MRL-permitted / 9 zero-tolerance therapeutic), and every value above are > C1-verified against the landed full text; remaining drug tables can be added from > the same source without re-sourcing. Values are limits in edible tissues of > *food-producing* animals — they govern residues in pet-food ingredients of animal > origin, not pet-feed additive limits.
Source notes
- First-hand source:
pdf-raw/vet-drug-mrl/cn_gb31650.txt(text extracted from the
official GB 31650-2019 national standard PDF), companions cn_gb31650.pdf, cn_gb31650_sh.html, cn_gb31650_mirror.html.
- Verified by
monitor/verify_cn_gb31650.py: all quoted clauses match the landed
source as normalized substrings.
- This is a food (not feed) standard — it governs residues in animal-derived
*food*. Its pet-food relevance is indirect (animal-origin pet-food ingredients), which is stated explicitly so the cell is not mistaken for a pet-feed additive limit.
Cross-references
cn_gb_31650_mrl_matrix— the full 104-drug-class × target-tissue MRL matrix
(all numeric MRL tables) plus the 9 zero-tolerance therapeutic drugs, extracted from the same landed source.
cn_gb_13078_feed_hygiene— GB 13078-2017 feed-hygiene contaminant limits (the
feed-tier counterpart in the CN pet-food safety framework).
cn_vet_drug_regulation_cited_2026— 《兽药管理条例》pet-feed penalty clauses.cn_feed_banned_drug_list_176— MOA Ann 176 prohibited-drugs-in-feed list.