中文
English
Russian
Technical specifications
Chemical and physical properties
| Serial Number | Indicator name | Technical Grade | Food Grade |
|---|---|---|---|
| 1 | Main Content | ≥ 98.0% | ≥ 98.0% |
| 2 | Phosphorus(V) oxide (P₂O₅) | ≥ 32.8% | ≥ 32.8% |
| 3 | Potassium oxide (K₂O) | ≥ 65.0% | ≥ 65.0% |
| 4 | Water-insoluble residue | ≤ 0.1% | ≤ 0.05% |
| 5 | pH (1% aqueous solution) | 11.5 — 12.5 | 11.5 — 12.5 |
| 6 | Fluorides | — | ≤ 0.003% |
| 7 | Heavy metals (as Pb) | — | ≤ 0.001% |
| 8 | Arsenic (as As) | — | ≤ 0.0003% |
Physical Properties
| Project | Description |
|---|---|
| Appearance | White Powder |
| Hygroscopicity | Hygroscopic |
| Water Solubility | Easily soluble in water, insoluble in alcohol |
| Corrosive activity | Has strong corrosive activity |
| Aqueous Solution | Gives an alkaline reaction |
| pH (1% aqueous solution) | 11.8 |
| Melting Point | 1340°C |
| Relative density | 2.564 |
Product description
Product overview
Tripotassium phosphate (abbreviated TKP), CAS number 7778-53-2, chemical formula K₃PO₄, molecular weight 212.27. It is a white hygroscopic powder, easily soluble in water, insoluble in alcohol, strongly corrosive, aqueous solution is alkaline.
Physical and chemical properties
- AppearanceWhite powder, hygroscopic
- Water SolubilityEasily soluble in water, insoluble in alcohol
- Corrosive activityHas strong corrosive activity
- pH1% aqueous solution pH 11.8, alkaline.
- Melting Point: 1340°C
- Relative density: 2.564
Specification standards
| Grade | Main Content | Main Application |
|---|---|---|
| Technical Grade | ≥ 98.0% | Liquid soap, paper, boiler water treatment. |
| Food Grade | ≥ 98.0% | Emulsifiers, Enhancers, Flavor Additives |
Quality indicators
Frequently asked questions
All three are important potassium phosphates; the main difference lies in potassium content and alkalinity:
- Chemical FormulaTKP is K₃PO₄, MKP is KH₂PO₄, DKP is K₂HPO₄
- K₂O content: TKP≥65%，MKP≥34%，DKP≥53%
- P₂O₅ content: TKP≥32.8%，MKP≥52%，DKP≥40%
- pHTKP has pH 11.8 (strongly alkaline), MKP/DKP has pH 8.6-9.4 (weakly alkaline)
- Selection recommendationsFor agricultural use, MKP is preferred; for food emulsifiers and water treatment, choose TKP.
Aqueous solution of tripotassium phosphate is strongly alkaline, which is its chemical characteristic:
- Reason for AlkalinityK₃PO₄ hydrolyzes in water to form OH⁻ ions.
- pH rangepH of 1% aqueous solution is 11.8
- Safety PrecautionsHas strong corrosive activity; not recommended to mix directly with acidic substances
The main difference lies in impurity content standards:
- Water-insoluble residueFood grade ≤0.05%, industrial grade ≤0.1%.
- FluoridesFood grade ≤0.003%, industrial grade no requirement.
- Heavy metalsFood grade ≤0.001%, industrial grade no requirement.
- ArsenicFood grade ≤0.0003%, industrial grade has no requirements.
Our tripotassium phosphate products support various packaging options:
- 25 kg/bagInner polyethylene bag, outer woven bag, suitable for small and medium batch orders
- 50 kg/bagInner polyethylene bag, outer woven bag, suitable for general purchasing needs.
- 1000 kg/bag (big bag)Suitable for bulk orders
Packaging: inner polyethylene bag, outer woven bag; store in a dry, well-ventilated place.
Send Inquiry
Please fill in the following information, and our commercial team will contact you.Within 2 working daysReply to you.
Products of the same series
More options for phosphate products to meet different application needs.
