Diammonium Citrate
CAS No.: 3012-65-5
Chemical Formula: (NH₄)₂HC₆H₅O₇
Molecular Weight: 243.2 g/mol
Synonyms: Diammonium hydrogen citrate, Ammonium citrate dibasic
1. Product Description
Diammonium Citrate is the diammonium salt of citric acid. It appears as a white to slightly off-white crystalline powder and is readily soluble in water. It functions primarily as an acidity regulator, buffering agent, and chelating agent in various applications. It is available in both Food Grade and Industrial Grade.
2. Specifications
| Parameters | Industrial Grade | Food Grade |
|---|
| Appearance | White to off-white powder | White crystalline powder |
| Assay (dry basis) | ≥ 98.0% | ≥ 99.0% |
| Ammonium Content | 24.0–28.0% | 24.0–28.0% |
| pH (1% solution) | 4.0–5.0 | 4.0–5.0 |
| Moisture (Loss on drying) | ≤ 2.0% | ≤ 1.0% |
| Solubility in Water | Complete | Complete |
| Heavy Metals (as Pb) | ≤ 20 ppm | ≤ 5 ppm |
| Arsenic (As) | ≤ 3 ppm | ≤ 1 ppm |
| Iron (Fe) | ≤ 50 ppm | ≤ 10 ppm |
| Residue on Ignition | ≤ 0.3% | ≤ 0.1% |
| Identification (IR or UV) | Conforms | Conforms |
| Microbial Limits | Not specified | TPC < 1000 cfu/g; Yeast & Mold < 100 cfu/g |
3. Applications
Food Grade
Acidity regulator in beverages and processed foods
Buffering agent to stabilize pH in dairy and cheese products
Chelating agent to improve mineral stability in nutritional products
Nutrient source (nitrogen-containing salt) in food supplements (regionally approved)
Note: Usage in food is subject to regional regulatory approval (e.g., EFSA, GB 2760, FDA).
Industrial Grade
Chelating agent in metal cleaning, electroplating, and water treatment
Buffer in chemical formulations
Reagent in analytical and laboratory processes
Intermediate in the manufacture of fertilizers and pharmaceuticals
4. Packaging & Storage
| Item | Details |
|---|
| Packaging | 25 kg paper bag or fiber drum, with PE liner |
| Storage Conditions | Store in a cool, dry, well-ventilated area. Keep tightly closed. Avoid moisture. |
| Shelf Life | 24 months from date of manufacture |
5. Regulatory & Safety Information
| Region | Regulatory Status |
|---|
| China (GB 2760) | Not widely listed as common food additive |
| EU (EFSA) | No assigned E-number; use not widely approved |
| USA (FDA) | Limited use; not GRAS |
29181500
GHS Classification: Not classified as hazardous
Handling: Use appropriate PPE. Avoid dust inhalation and contact with eyes/skin. Refer to SDS.
6. Product Advantages
Excellent water solubility
Dual-function as acidulant and nitrogen donor
Stable under standard storage conditions
Available in multiple grades for diverse industry needs
China
