{"topic_id":"ECFR_pet_food_clay_carbon","category":"ecfr","context":"---\ntopic_id: \"ECFR_pet_food_clay_carbon\"\ncategory: \"ecfr\"\ntitle: \"ECFR pet food clay carbon\"\nlang: en\nsource_document: \"U.S. Code of Federal Regulations (eCFR)\"\ncitation:\n  authority: \"ecfr\"\n  title: \"ECFR pet food clay carbon\"\n  url: \"\"\n  retrieved: \"\"\n  ref: \"\"\n  doc_type: \"official source\"\n  needs_review: true\nauthority_tier: T1\nauthority_tier_basis: \"T1:us-gov\"\nauthority_tier_date: 2026-08-04\n---\nAnti-caking and related processing aids for pet food span FDA's feed-additive and GRAS lists plus AAFCO's Chapter Six additive table: 21 CFR 573.940 silicon dioxide, 573.260 calcium silicate, 573.340 diatomaceous earth and 573.900 pyrophyllite are listed as animal-feed additives; 21 CFR 582.2729 covers hydrated sodium calcium aluminosilicate (GRAS for animal feed); and AAFCO's Chapter Six table lists montmorillonite clays as anti-caking aid, pelleting aid and non-nutritive carrier at not more than 2% of the finished material. (Earlier drafts of this topic cited wrong section numbers — silicon dioxide is 573.940, not 573.340 which is diatomaceous earth; there is no 573.245 or 582.2160 in the parsed parts, and 573.880 is normal propyl alcohol, not bentonite.) Mineral-oil-based dust suppressants (573.680 mineral oil; 573.720 petrolatum/petroleum jelly) are limited to 3% in mineral supplements and 0.06% of the total ration per the AAFCO table. Because the parsed corpus indexes section numbers and titles rather than full text, exact inclusion-rate ceilings for each additive should be confirmed in the current eCFR section text before formulation use.\n","sources":["ecfr — ECFR pet food clay carbon"],"source":{"authority":"ecfr","title":"ECFR pet food clay carbon","url":"https://www.ecfr.gov/","retrieved":"","ref":"","doc_type":"official source","source_document":"U.S. Code of Federal Regulations (eCFR)","verification_file":""},"source_document":"U.S. Code of Federal Regulations (eCFR)","source_file":"","trust":{"authority_tier":"T1","fidelity":"verbatim","license":null,"display_grade":"A"},"tokens_estimated":146,"generated_at":"2026-07-16","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."}