Product Description:

Food-Grade vs. Liquid Fertilizer-Grade Manganese Carbonate

Application Markets & Chemical Specification Requirements

I. Application & Market Positioning

Food-Grade Manganese Carbonate (GB 1903.58‑2022)

- Main application: Used as a food nutritional fortifier in dairy products, solid/liquid beverages, flour products, confectionery, health supplements, etc., to supplement essential manganese for humans.

- Market characteristics: Small batch, high added value, strict regulatory compliance. Requires food production licenses and third-party testing. Targets food manufacturers and health product enterprises.

- Core requirements: Absolute safety, low toxicity, free of harmful impurities, in full compliance with national food safety standards.

Manganese Carbonate for Liquid Fertilizers (Agricultural / Water-Soluble Grade)

Main application: Raw material for liquid water-soluble fertilizers, foliar fertilizers, and chelated manganese fertilizers, providing manganese for crops to support photosynthesis and enzyme metabolism, suitable for acidic and alkaline soils.

- Market characteristics: Large batch, cost-oriented, compatible with liquid fertilizer systems. Targets fertilizer plants and agricultural input enterprises, complying with agricultural standards such as NY/T and GB/T.

- Core requirements: Good solubility / chelatability, low water-insoluble matter, compliant heavy metal content, stable in liquid fertilizer pH systems.


II. Chemical Specification Comparison

1. Main Content

- Food-grade: MnCO₃ ≥ 90.0% (Mn ≈ 44.5%)

- Liquid fertilizer-grade: Mn ≥ 43.5–44.0% (MnCO₃ ≈ 88–90%); some industrial grades ≥ 99%

- Difference: Food-grade requires higher purity; liquid fertilizer-grade focuses more on available manganese content.

2. Heavy Metals & Toxic Impurities

表格

Item Food‑grade (GB 1903.58) Liquid fertilizer‑grade (Agricultural Standard)
Total Arsenic (As) ≤ 3.0 mg/kg ≤ 10 mg/kg (GB 38400)
Lead (Pb) ≤ 2.0 mg/kg ≤ 40 mg/kg (GB 38400)
Cadmium (Cd) Not specified ≤ 10 mg/kg (GB 38400)
Mercury (Hg) Not specified ≤ 5 mg/kg (GB 38400)
Iron (Fe) Not specified ≤ 50 mg/kg (typical)
Cu / Zn Not specified ≤ 50–100 mg/kg (typical)

- Conclusion: Food-grade imposes extremely strict limits on heavy metals and toxic impurities; liquid fertilizer-grade follows agricultural safety limits, which are 10–20 times looser.

4. Other Key Indicators

- Food-grade: Loss on drying and residue on ignition are tested to meet food hygiene standards; no special chelation or solubility requirements (added directly as powder).

- Liquid fertilizer-grade: Must be easily soluble in acids or chelating agents (e.g., EDTA); compatible with pH 5–8 to avoid flocculation; good flowability and non-caking.



III. Physical Properties

- Food-grade: Pinkish‑red to light brown powder, relatively coarse particle size (100–200 mesh), bulk density 0.6–0.8 g/cm³, no special flowability requirements.

- Liquid fertilizer-grade: White or light pink powder, finer particle size (200–325 mesh), bulk density 0.5–0.7 g/cm³, good flowability and dispersibility.

Chemical requirements: Food-grade has extremely strict limits on heavy metals, As and Pb, and high purity; liquid fertilizer-grade emphasizes strict control of SO₄²⁻ and water-insoluble matter, good solubility and chelatability.

- Market profile: Food-grade is small‑batch, high‑margin, highly regulated; liquid fertilizer-grade is large‑batch, cost-sensitive, and designed for liquid systems.

Technical Parameters:

Customization:

Product Customization Services for Fine Chemical Manganese Salt:

Brand Name: SLQ -MC90-FG

Model Number: SLQ

Place of Origin: CHINA

Molecular Formula: MnSO4

Package: 25kg Pp Bag And 25kg Kraftpaper Bag

Production Capacity: 3000tons

Melting Point: 700°C

Storage Temp: Storage Temp.

Keywords: Batter grade manganese carbonate, Exporter of manganese carbonate in China