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Send EmailTripotassium Phosphate, Potassium Phosphate Tribasic, Tripotassium Orthophosphate, TKP, TPP, E340iii, 7778-53-2
TRIPOTASSIUM PHOSPHATE (TKP)
PRODUCT IDENTIFIER INFORMATION
| Parameter | Information |
|---|---|
| Product Name | Tripotassium Phosphate (TKP) |
| Chemical Name (IUPAC) | Tripotassium Phosphate |
| CAS Number | 7778-53-2 |
| EC Number (EINECS) | 231-907-1 |
| Food Additive Code | E340(iii) |
| Molecular Formula | K3PO4 |
| Molecular Weight | 212.27 g/mol |
SECTION 1: CHEMICAL IDENTITY AND DESCRIPTION
| Parameter | Information |
|---|---|
| Chemical Name (IUPAC) | Tripotassium Phosphate |
| Synonyms | Tripotassium Phosphate, Potassium Phosphate Tribasic, TKP, Tripotassium Orthophosphate |
| Abbreviations | TKP, TPP |
| CAS Number | 7778-53-2 |
| EC Number (EINECS) | 231-907-1 |
| Food Additive Code | E340(iii) |
| INS Number | 340(iii) |
| Molecular Formula | K3PO4 |
| Molecular Weight | 212.27 g/mol |
| Chemical Class | Inorganic phosphate salt (alkali metal phosphate) |
| Physical State (20°C) | Solid (white crystalline powder or granules) |
| Odor | Odorless |
| Taste | Alkaline, characteristic |
SECTION 2: PHYSICAL AND CHEMICAL PROPERTIES
| Property | Value | Test Method |
|---|---|---|
| Appearance | White crystalline powder or granules | Visual |
| Odor | Odorless | Olfactometric |
| Taste | Alkaline, characteristic | Sensory |
| Molecular Weight | 212.27 g/mol | Calculated |
| Melting Point | ~1340°C | DSC |
| Density (25°C) | 2.56 g/cm3 | ASTM D4052 |
| pH (1% solution, 25°C) | 11.5 – 12.5 (strongly alkaline) | pH Meter |
| Solubility in Water (25°C) | Completely soluble (~900 g/L) | Gravimetric |
| Solubility in Ethanol | Insoluble | General Method |
| Hygroscopicity | Slightly hygroscopic (absorbs moisture) | Visual |
| Stability | Stable under normal conditions | |
| Flash Point | Non-flammable | Not applicable |
SECTION 3: CHEMICAL PROPERTIES AND REACTIVITY
| Parameter | Information |
|---|---|
| Chemical Character | Strongly alkaline phosphate salt; pH regulator; emulsifier |
| Stability | Stable under normal conditions |
| Decomposition Products (Heating) | Above 1340°C: K2O, P2O5, phosphorus oxides |
| Incompatible Materials | Strong acids, strong oxidizing agents |
| Reaction with Acids | Neutralization; converts to dipotassium phosphate and monopotassium phosphate |
| Aqueous Solution | Forms strongly alkaline solution (pH 11.5-12.5) |
| Chelation | Binds Ca2+ and Mg2+ ions; removes water hardness |
| Hazardous Polymerization | Does not occur |
SECTION 4: POTASSIUM PHOSPHATE TYPES COMPARISON
| Property | TKP (E340iii) | DKP (E340ii) | MKP (E340i) |
|---|---|---|---|
| Compound | Tripotassium Phosphate | Dipotassium Phosphate | Monopotassium Phosphate |
| Formula | K3PO4 | K2HPO4 | KH2PO4 |
| pH (1% solution) | 11.5 – 12.5 | 8.5 – 9.5 | 4.2 – 4.8 |
| Character | Strongly alkaline | Slightly alkaline | Acidic |
| Solubility | ~900 g/L | ~1600 g/L | ~250 g/L |
| K2O Content | ~66% | ~53% | ~34% |
| P2O5 Content | ~33% | ~40% | ~52% |
| Primary Use | pH regulator, detergent | Buffer, food | Buffer, fertilizer |
SECTION 5: FUNCTIONAL PROPERTIES AND MECHANISM OF ACTION
| Property | Description |
|---|---|
| pH Regulator | Balances acidity in foods and beverages with its strongly alkaline character; raises pH |
| Emulsifier | Stabilizes oil-water emulsions; provides homogeneous structure in processed foods |
| Stabilizer | Prevents phase separation in food formulations; increases product stability |
| Water Holding Capacity | Increases water retention in meat and dairy products; improves texture; reduces cooking loss |
| Water Softener | Binds Ca2+ and Mg2+ ions in hard water; enhances detergent efficacy |
| Alkalinity Builder | Provides high alkalinity in detergent and cleaning products; enhances soil removal power |
| Corrosion Inhibitor | Prevents corrosion by forming protective layer on metal surfaces |
| Potassium Source | Source of potassium and phosphorus in plant nutrition and fertilizer applications |
SECTION 6: PRIMARY APPLICATION AREAS
| Sector / Application | Use | Typical Concentration / Dosage |
|---|---|---|
| Food - Processed Meat (E340iii) | Water retention, texture improver, emulsifier | 0.1 – 0.5% |
| Food - Dairy Products | Stabilizer, emulsifier | 0.1 – 0.5% |
| Food - Beverages | Acidity regulator, pH balancer | 0.05 – 0.3% |
| Food - Bakery | Dough conditioner | 0.1 – 0.3% |
| Detergent / Cleaning | Water softener, alkalinity builder | 5 – 20% |
| Industrial Cleaning | Metal surface cleaner, corrosion inhibitor | 2 – 10% |
| Water Treatment | pH adjustment, corrosion control | 5 – 50 mg/L |
| Agriculture / Fertilizer | Potassium and phosphorus source (liquid fertilizer) | Variable |
| Textile | Dyeing aid, pH buffer | 1 – 5% |
| Ceramics | Dispersing agent | 0.5 – 2.0% |
SECTION 7: QUALITY SPECIFICATIONS (FOOD GRADE - E340iii)
| Parameter | Specification | Test Method |
|---|---|---|
| Appearance | White crystalline powder or granules | Visual |
| Odor | Odorless | Olfactometric |
| Purity (K3PO4, Dry Basis) | ≥ 97.0% | Titrimetric / AAS |
| K2O Content | ≥ 45.0% | Flame Photometry / AAS |
| P2O5 Content | ≥ 33.0% | Gravimetric (Phosphomolybdate) |
| Loss on Drying (105°C, 2 hours) | ≤ 1.0% | Gravimetric |
| pH (1% solution, 25°C) | 11.5 – 12.5 | pH Meter |
| Water Insoluble Matter | ≤ 0.2% | Gravimetric |
| Fluoride (F-) | ≤ 50 ppm | Ion Selective Electrode |
| Chloride (Cl-) | ≤ 0.05% | Argentometric |
| Sulfate (SO4 2-) | ≤ 0.05% | Turbidimetric |
| Heavy Metals (as Pb) | ≤ 10 ppm | ICP-MS |
| Lead (Pb) | ≤ 2 ppm | ICP-MS |
| Arsenic (As) | ≤ 3 ppm | ICP-MS |
| Mercury (Hg) | ≤ 1 ppm | ICP-MS |
| Cadmium (Cd) | ≤ 1 ppm | ICP-MS |
| Iron (Fe) | ≤ 50 ppm | AAS / Colorimetric |
| Total Microbial Count | ≤ 1,000 CFU/g | ISO 4833 |
| Yeast and Mold | ≤ 100 CFU/g | ISO 21527 |
| E. coli | Negative in 10g | ISO 16649 |
| Salmonella spp. | Negative in 25g | ISO 6579 |
SECTION 8: TOXICOLOGICAL PROFILE
| Parameter | Value |
|---|---|
| Acute Oral Toxicity (LD50, Rat) | > 2,000 mg/kg |
| Acute Dermal Toxicity (LD50, Rabbit) | > 2,000 mg/kg |
| Skin Irritation | Irritant (strongly alkaline pH) |
| Eye Irritation | Severe irritant |
| Respiratory Irritation | Inhalation of dust may cause mechanical and chemical irritation |
| Carcinogenicity | Not classified |
| Mutagenicity | Negative in in vitro tests |
| Reproductive Toxicity | No known adverse effects |
| Chronic Toxicity | Gastrointestinal discomfort at high doses |
| ADI (Total Phosphate) | 0-70 mg/kg body weight/day (JECFA) |
SECTION 9: GHS CLASSIFICATION AND LABELING
GHS Classification (compliant with 1272/2008/EC):
| Hazard Class | Category | H-Statement |
|---|---|---|
| Skin Irritation | Category 2 | H315 |
| Serious Eye Damage/Irritation | Category 1 | H318 |
| Specific Target Organ Toxicity (STOT - SE) | Category 3 | H335 |
Signal Word: DANGER
Hazard Pictograms: GHS05 (Corrosive), GHS07 (Exclamation Mark)
Hazard Statements (H-Codes):
| Code | Statement |
|---|---|
| H315 | Causes skin irritation |
| H318 | Causes serious eye damage |
| H335 | May cause respiratory irritation |
Precautionary Statements (P-Codes):
| Code | Statement |
|---|---|
| P261 | Avoid breathing dust |
| P280 | Wear protective gloves/eye protection/face protection |
| P302+P352 | IF ON SKIN: Wash with plenty of water and soap |
| P305+P351+P338 | IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present |
| P310 | Immediately call a POISON CENTER/doctor |
SECTION 10: FIRST AID MEASURES
| Exposure Route | Action to Take |
|---|---|
| Inhalation | Move to fresh air. Seek medical attention if respiratory irritation persists. |
| Skin Contact | Wash with plenty of water and soap for at least 15 minutes. Seek medical attention if irritation persists. |
| Eye Contact | Rinse immediately with plenty of water for at least 15 minutes. Remove contact lenses if present. Seek immediate medical attention. |
| Ingestion | Rinse mouth with water. Drink plenty of water. Seek medical attention if you feel unwell. |
SECTION 11: FIREFIGHTING MEASURES
| Parameter | Information |
|---|---|
| Fire Hazard | Non-flammable |
| Hazards During Fire | Above 1340°C: K2O, P2O5, phosphorus oxides |
| Suitable Extinguishing Media | Any extinguishing media appropriate for surrounding fire |
| Special Protective Equipment | Self-contained breathing apparatus (SCBA), full protective clothing |
SECTION 12: STORAGE AND SHELF LIFE
| Parameter | Information |
|---|---|
| Storage Conditions | Cool (15-25°C), dry, well-ventilated area; away from moisture |
| Container Requirements | Tightly closed, moisture-proof containers |
| Keep Away From | Moisture (slightly hygroscopic), direct sunlight, strong acids |
| Shelf Life | 24 months (unopened original packaging under appropriate storage conditions) |
| Stability Note | Slightly hygroscopic; may cake in humid environment |
SECTION 13: PACKAGING OPTIONS
| Packaging Type | Quantity | Material |
|---|---|---|
| PP/PE bag | 25 kg | PP + PE |
| Kraft sack (with PE inner liner) | 25 kg | Kraft paper + PE |
| Big-Bag | 500-1000 kg | Polypropylene (with PE inner liner) |
| Plastic pail | 25 kg | HDPE |
SECTION 14: TRANSPORTATION INFORMATION
| Parameter | Information |
|---|---|
| UN Number | UN 3262 (Corrosive Solid, Basic, Inorganic, n.o.s.) |
| Hazard Class | 8 (Corrosive) |
| Packing Group | III |
| ADR/RID | UN 3262, Corrosive Solid, 8, PG III |
| IMDG Code | UN 3262, Corrosive Solid, 8, PG III |
| IATA (Air) | UN 3262, Corrosive Solid, 8, PG III |
| Marine Pollutant | No |
| Transport Temperature | Ambient; protect from moisture |
SECTION 15: REGULATORY STATUS
| Region / Authority | Status |
|---|---|
| European Union | Food additive E340(iii); approved for use quantum satis |
| USA (FDA) | GRAS; approved as food additive |
| JECFA (FAO/WHO) | ADI: 0-70 mg/kg body weight/day (total phosphate) |
| Turkey | Approved under Turkish Food Codex Regulation on Food Additives |
| Halal / Kosher | Available |
| Vegetarian/Vegan | Suitable (inorganic source) |
SECTION 16: OTHER NAMES AND SYNONYMS
| Type | Name |
|---|---|
| Common Names | Tripotassium Phosphate, Potassium Phosphate Tribasic, TKP, Tripotassium Orthophosphate |
| Food Additive Code | E340(iii), INS 340(iii) |
| CAS Number | 7778-53-2 |
| EC Number | 231-907-1 |
SECTION 17: SUMMARY TABLE
| Parameter | Value |
|---|---|
| Product | Tripotassium Phosphate (TKP) |
| CAS Number | 7778-53-2 |
| Food Additive Code | E340(iii) |
| Molecular Formula | K3PO4 |
| Molecular Weight | 212.27 g/mol |
| Appearance | White crystalline powder or granules |
| pH (1% solution) | 11.5 – 12.5 |
| Solubility in Water | Completely soluble (~900 g/L) |
| Primary Function | pH regulator, emulsifier, stabilizer, water retention enhancer |
| Shelf Life | 24 months |
| GHS Signal Word | Danger |
| UN Number | UN 3262 (Corrosive Solid, 8, PG III) |
SECTION 18: CRITICAL WARNINGS AND BEST PRACTICES
CRITICAL WARNINGS:
Strongly Alkaline: 1% solution pH 11.5-12.5; may cause serious skin and eye damage. Use protective equipment.
Eye Damage: Causes serious eye damage (H318). Protective goggles/face shield mandatory.
Slightly Hygroscopic: Absorbs moisture; store in tightly closed containers.
Reaction with Acids: Neutralization reaction with strong acids is exothermic; heat is released.
Food Use: When used as food additive, comply with Turkish Food Codex and Codex Alimentarius limits.
BEST PRACTICE RECOMMENDATIONS:
Solution Preparation: Completely soluble in water; use warm water to increase solubility.
pH Adjustment: When using as acidity regulator in foods and beverages, add gradually to reach target pH.
Detergent Formulation: Use at 5-20% as alkalinity builder and water softener.
Storage: Store in dry and cool environment, protected from moisture.
Safety: Due to strongly alkaline character, always wear protective goggles, gloves, and appropriate PPE.
LEGAL DISCLAIMER:
The information provided in this document is presented in good faith based on our current knowledge and experience; however, since all usage conditions are beyond our control, it does not constitute a binding specification or warranty. This Technical Data Sheet is for informational purposes only. Users are obligated to test the suitability for their own applications. For complete safety, storage, handling, transportation, disposal, and regulatory compliance information, refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier.