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Technical Specifications
Basic Information
| Item | Parameters |
|---|---|
| Product Name | Potassium Pyrophosphate |
| English Name | Tetra Potassium Pyrophosphate (TKPP) |
| CAS Number | 7320-34-5 |
| Chemical Formula | K4P2O7 |
| Molecular Weight | 330.34 |
| Appearance | White Powder or Lumps |
| Apparent Specific Gravity | Above 0.3 |
| Melting Point | 1100℃ |
Physical and Chemical Properties
| Item | Description |
|---|---|
| Appearance | White Powder or Lumps |
| Water Solubility | Highly soluble in water (high solubility, 187g/100g water at 25°C) |
| Alcohol Solubility | Insoluble in alcohol |
| Hygroscopicity | Slightly Deliquescent |
| pH Value (Aqueous Solution) | 1 — 10.7, Alkaline |
| Melting Point | 1100℃ |
| Apparent Specific Gravity | Above 0.3 |
Technical Specifications — Industrial Grade
| Serial Number | Specification Name | Requirement |
|---|---|---|
| 1 | Main content % ≥ | 98 |
| 2 | P2O5 % ≥ | 42.2 |
| 3 | Cl % ≤ | 0.005 |
| 4 | Iron (Fe) % ≤ | 0.008 |
| 5 | Water Insoluble Matter % ≤ | 0.2 |
| 6 | pH Value | 10.1 — 10.7 |
| 7 | Heavy metals % ≤ | 0.003 |
| 8 | Fluorine % ≤ | 0.001 |
| 9 | Arsenic % ≤ | 0.005 |
| 10 | Loss on Ignition % ≤ | 0.5 |
Technical Specifications — Food Grade
| Serial Number | Specification Name | Requirement |
|---|---|---|
| 1 | Main content % ≥ | 98 |
| 2 | P2O5 % ≥ | 42.2 |
| 3 | Cl % ≤ | 0.001 |
| 4 | Iron (Fe) % ≤ | 0.003 |
| 5 | Water Insoluble Matter % ≤ | 0.1 |
| 6 | pH Value | 10.1 — 10.7 |
| 7 | Heavy metals % ≤ | 0.001 |
| 8 | Fluorine % ≤ | 0.001 |
| 9 | Arsenic % ≤ | 0.0003 |
| 10 | Loss on Ignition % ≤ | 0.5 |
Packaging & Storage
| Item | Description |
|---|---|
| Packaging Method | Inner Plastic, Outer Woven |
| Packaging Specifications | 25 kg/bag, 50 kg/bag, 1000 kg/bag (ton bag) |
| Storage Conditions | Store in a cool, dry, and well-ventilated place |
| Precautions | Keep Dry, Slightly Deliquescent |
Product Introduction
Product Overview
Potassium Pyrophosphate (Tetra Potassium Pyrophosphate, TKPP), CAS No. 7320-34-5, chemical formula K₄P₂O₇, molecular weight 330.34. Appearance is white powder or lumps, apparent specific gravity above 0.3, melting point 1100°C, soluble in water, insoluble in alcohol, aqueous solution is alkaline. Slightly deliquescent.
Physical and Chemical Properties
- AppearanceWhite Powder or Lumps
- Water SolubilityEasily soluble in water (187g/100g water at 25℃)
- Alcohol SolubilityInsoluble in Alcohol
- HygroscopicitySlightly Deliquescent
- Melting Point: 1100℃
- pH ValueAqueous solution pH 10.1-10.7, alkaline
- Apparent Specific GravityAbove 0.3
Specifications & Standards
| Grade | Main Content | Main Applications |
|---|---|---|
| Industrial Grade | ≥ 98% | Cyanide-free electroplating, detergents, metal cleaning |
| Food Grade | ≥ 98% | Food Processing Additives |
Quality Indicators
Application Fields
Cyanide-Free Electroplating
Primarily used in cyanide-free electroplating processes, it is an important electroplating chemical reagent.
- Cyanide-free electroplating solution preparation
- Pre-Plating Treatment Agents
- Pyrophosphate Electroplating Solution
- Electroplating Additives
Detergent Industry
It is an important component of various cleaning agents, widely used in laundry and household cleaning.
- Laundry Detergent
- Metal Cleaner
- Bottle Cleaner
- Industrial Cleaner
- Surfactant Components
Metal Treatment
Used for metal surface treatment and cleaning.
- Metal Cleaner
- Bottle Cleaning Agent
- Metal Surface Treatment
Ceramic Industry
Used as a clay dispersant, playing a vital role in ceramic production.
- Clay Dispersant
- Ceramic Glaze
- Ceramic Additive
Other Industrial Applications
High-quality raw materials for various industrial fields.
- Water Treatment Agents
- Food Processing (Food Grade)
- Pharmaceutical Intermediates
- Laboratory Reagent
- Store in a cool, dry, well-ventilated place, avoiding damp environments.
- The product is slightly deliquescent; it should be used promptly or resealed after opening the bag.
- Avoid direct mixing with acidic substances to prevent chemical reactions.
- Keep dry and protected from rain during transportation to avoid packaging damage.
- It is recommended to wear protective gloves and a mask during use to avoid direct skin contact and inhalation of dust.
FAQ
Both are important pyrophosphates, primarily differing in their cations:
- Different Chemical FormulaTKPP is K₄P₂O₇ (Potassium Pyrophosphate), Sodium Pyrophosphate is Na₄P₂O₇.
- Potassium Ion vs Sodium IonTKPP provides potassium ions, while sodium pyrophosphate provides sodium ions
- Application DifferencesTKPP is commonly used in electroplating and detergents; Sodium Pyrophosphate is commonly used as a food additive.
Potassium pyrophosphate is an important raw material for cyanide-free electroplating:
- Eco-Friendly & SafeCyanide-free, avoiding risks of cyanide poisoning and environmental pollution
- Coating QualityCan achieve smooth, fine plating
- Process StabilityStable electroplating solution, mature operating process
The alkalinity of potassium pyrophosphate aqueous solution is its chemical property:
- Cause of AlkalinityK₄P₂O₇ hydrolyzes in water to produce OH⁻ ions
- pH Range1% aqueous solution pH value is 10.1-10.7
- Usage NotesNot suitable for direct mixing with acidic substances
The main differences between the two lie in impurity content standards and application fields:
- Impurity LimitsFood grade imposes stricter requirements on impurities such as heavy metals, arsenic, and chlorine
- Water-Insoluble MatterFood grade ≤0.1%, Industrial grade ≤0.2%
- Application FieldsFood grade for food processing; Industrial grade for electroplating, detergents, etc.
Our potassium pyrophosphate products support multiple packaging specifications:
- 25 kg/bagInner plastic, outer woven packaging, suitable for small to medium batch procurement
- 50 kg/bagInner plastic, outer woven packaging, suitable for general procurement needs
- 1000 kg/bag (ton bag)Suitable for bulk purchasing, lower cost
Packaging: Inner plastic bag, outer woven bag. Store in a cool, dry, and well-ventilated place.
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