{"topic_id":"AAFCO_Ch6_dicalcium_phosphate","category":"aafco","context":"---\ntopic_id: \"AAFCO_Ch6_dicalcium_phosphate\"\ncategory: \"aafco\"\ntitle: \"AAFCO Ch6 dicalcium phosphate\"\nlang: en\nsource_document: \"AAFCO Model Pet Food Regulations\"\ncitation:\n  authority: \"AAFCO wp-content/uploads PDF\"\n  title: \"AAFCO Ch6 dicalcium phosphate\"\n  url: \"\"\n  retrieved: \"2026-07-21\"\n  ref: \"\"\n  doc_type: \"official source\"\n  needs_review: true\nauthority_tier: T1\nauthority_tier_basis: \"T1:std-body\"\nauthority_tier_date: 2026-08-04\ntokens_estimated: 245\n---\nAAFCO Ch6 definition 57.71 Dicalcium Phosphate is a calcium salt of phosphoric acid generally expressed as CaHPO4 and its hydrated forms (IFN 6-01-080, calcium phosphate dibasic from defluorinated phosphoric acid). Minimum phosphorus (P), minimum calcium (Ca) and maximum fluorine (F) must be specified, and it must not contain more than 1 part of fluorine to 100 parts phosphorus (Adopted 1975). Dicalcium phosphate is used as a mineral supplement to supply calcium and phosphorus and to adjust the calcium-to-phosphorus ratio of the formula; the AAFCO definition does not itself fix assay values (typical trade material runs roughly 22-26% Ca and 18-20% P by specification, not by definition). Over-supplementation can push a formula past the AAFCO dog profile maxima (Ca 1.8% DM growth / 2.5% DM adult; P 1.6% DM), which matters most in mineral-dense or all-meat formulations. It is commonly used in extruded dry food and in vitamin-mineral premixes to fine-tune mineral balance.\n","sources":["AAFCO wp-content/uploads PDF — AAFCO Ch6 dicalcium phosphate (retrieved 2026-07-21)"],"source":{"authority":"AAFCO wp-content/uploads PDF","title":"AAFCO Ch6 dicalcium phosphate","url":"https://www.aafco.org/","retrieved":"2026-07-21","ref":"","doc_type":"official source","source_document":"AAFCO Model Pet Food Regulations","verification_file":""},"source_document":"AAFCO Model Pet Food Regulations","source_file":"","trust":{"authority_tier":"T1","fidelity":"verbatim","license":null,"display_grade":"A"},"tokens_estimated":153,"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.","structured_data":{"note":"The nutrient values in this topic are also available as structured data — faster and exact, no text parsing needed.","compare":"/api/v1/cross_compare?standards=AAFCO,FEDIAF,KFDA&species=dog&lifestage=adult&nutrient=protein&basis=DM","coverage":"Standards: AAFCO (year>=2014), FEDIAF (year>=2025), EU PARNUT (year>=2020), KFDA/NIAS Korea (year>=2024). species: dog|cat. lifestage: adult|GR (growth/puppy/kitten map to growth-reproduction). basis: DM|cal.","single":"/api/v1/nutrient?standard=AAFCO&year=2024&species=dog&lifestage=adult&nutrient=protein&basis=DM","batch":"/api/v1/batch_nutrient?standard=AAFCO&year=2024&species=dog&lifestage=adult&nutrients=protein,fat,calcium,phosphorus&basis=DM"}}