GB 7300.311-2025 Feed additives—Part 3: Minerals and their complexes (or chelates)—Monocalcium phosphate English, Anglais, Englisch, Inglés, えいご
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ICS
CCS H
National Standard of the People's Republic of China
GB 7300.311-2025
Feed additives - Part 3: Minerals and their complexes (or chelates) - Monocalcium phosphate
饲料添加剂 第3部分：矿物元素及其络（螯）合物 磷酸二氢钙
Issue date: 2025-12-31 Implementation date: 2027-01-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
Introduction
1 Scope
2 Normative References
3 Terms and Definitions
4 Chemical Name, Molecular Formula, and Relative Molecular Mass
5 Technical Requirements
6 Sampling
7 Test Methods
8 Inspection Rules
9 Labeling, Packaging, Transportation, Storage, and Shelf Life
Introduction
Feed additives refer to substances added in small or trace amounts during feed processing, manufacturing, or use, including nutritional feed additives and general feed additives. For ease of use, GB 7300 "Feed Additives" is divided into the following 13 major categories based on product type:
— Amino acids, amino acid salts and their analogues;
— Vitamins and vitamin-like substances;
— Mineral elements and their complexes (chelates);
— Enzyme preparations;
— Microorganisms;
— Non-protein nitrogen;
— Antioxidants;
— Preservatives, anti-mold agents, and acidity regulators;
— Colorants;
— Flavoring and palatability enhancers;
— Binders, anti-caking agents, stabilizers, and emulsifiers;
— Polysaccharides and oligosaccharides;
— Others.
The product monocalcium phosphate dihydrate covered in this document belongs to Category 3: Mineral elements and their complexes (chelates). As it is the 11th product standard published under this major category, this document is designated GB 7300.311, serving as Part 311 of GB 7300.
Feed Additives — Part 3: Mineral Elements and Their Complexes (Chelates) — Monocalcium Phosphate Dihydrate
1 Scope
This document specifies the chemical name, molecular formula, and relative molecular mass of monocalcium phosphate dihydrate. It specifies the technical requirements, inspection rules, labeling, packaging, transportation, storage, and shelf life for the feed additive monocalcium phosphate dihydrate. It also describes the sampling and test methods.
This document applies to the feed additive monocalcium phosphate dihydrate produced by chemical synthesis using wet-process phosphoric acid and calcium-containing compounds as raw materials.
2 Normative References
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 601 Chemical reagents — Preparations of standard volumetric solutions
GB/T 603 Chemical reagents — Preparations of reagent solutions for use in test methods
GB/T 6003.1-2022 Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth
GB/T 6682 Water for analytical laboratory use — Specification and test methods
GB/T 8170 Rules for rounding off of numerical values and expression and judgement of limiting values
GB 10648 Feed labeling
GB/T 13079 Determination of total arsenic in feeds
GB/T 13080 Determination of lead in feeds — Atomic absorption spectrometry
GB/T 13082 Determination of cadmium in feeds
GB/T 13083 Determination of fluorine in feeds — Ion selective electrode method
GB/T 13088 Determination of chromium in feeds
GB/T 14699 Animal feeding stuffs — Sampling
GB/T 23769 Inorganic chemical products — General method for the determination of pH values in aqueous solutions
3 Terms and Definitions
No terms and definitions are required for this document.
4 Chemical Name, Molecular Formula, and Relative Molecular Mass
Chemical name: Monocalcium phosphate dihydrate
Molecular formula: Ca(H₂PO₄)₂·H₂O
Relative molecular mass: 252.06 (based on the 2022 International Table of Relative Atomic Masses)
5 Technical Requirements
5.1 Appearance and Properties
It shall be a white, gray, or slightly yellowish powder or granules.
5.2 Identification
It shall conform to the identification reactions for calcium ions and phosphate ions.
5.3 Physicochemical Indices
It shall comply with the requirements specified in Table 1.
5.4 Hygienic Indices
It shall comply with the requirements specified in Table 2.
6 Sampling
Perform according to the provisions of GB/T 14699.
7 Test Methods
Caution: Some reagents used in the test methods are corrosive. Handle with care and take appropriate safety and protective measures.
7.1 General Provisions
Unless otherwise specified, use reagents of analytical grade; standard volumetric solutions and other reagents shall be prepared according to the provisions of GB/T 601 and GB/T 603; use water of grade 3 quality as specified in GB/T 6682.
7.2 Appearance and Properties
Place an appropriate amount of the sample on a clean, dry white porcelain plate and observe its color and properties under natural light.
7.3 Identification
7.3.1 Reagents or Materials
7.3.1.1 Glacial acetic acid.
7.3.1.2 Hydrochloric acid solution: V(hydrochloric acid) : V(water) = 1 : 1.
7.3.1.3 Ammonia solution: V(ammonia water) : V(water) = 1 : 1.
7.3.1.4 Ammonium oxalate solution (100 g/L): Weigh 10 g of ammonium oxalate, dissolve in water, dilute to 100 mL, and mix well.
7.3.1.5 Silver nitrate solution (170 g/L): Weigh 17 g of silver nitrate, dissolve in water, dilute to 100 mL, and mix well.
7.3.2 Test Procedure
7.3.2.1 Calcium Ion
Weigh approximately 0.1 g of the sample, add 5 mL of glacial acetic acid (7.3.1.1), boil to dissolve the sample, cool, and filter. Add 5 mL of ammonium oxalate solution (7.3.1.4) to the filtrate. A white precipitate should form. Add an appropriate amount of hydrochloric acid solution (7.3.1.2) to a small portion of the precipitate; the precipitate should dissolve.
7.3.2.2 Phosphate Ion
Dissolve approximately 0.1 g of the sample in 10 mL of water. Add 1 mL of silver nitrate solution (7.3.1.5). A yellow precipitate should form. Add 2 mL of glacial acetic acid (7.3.1.1) to a small portion of the precipitate; the precipitate should not dissolve. Add an appropriate amount of ammonia solution (7.3.1.3) to another small portion of the precipitate; the precipitate should dissolve.
