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Sodium Acid Pyrophosphate
Sodium Acid Pyrophosphate (SAPP) is an inorganic compound with the chemical formula Na₂H₂P₂O₇. It is a white, crystalline powder or granular solid that serves as a versatile leavening agent, buffering agent, and sequestrant. SAPP is widely used in food processing, water treatment, and industrial applications due to its ability to control pH, chelate metals, and modify texture.
Sodium Acid Pyrophosphate
Primary Uses
- Food Industry (E450i)
- Leavening Agent: Releases carbon dioxide slowly in baked goods (e.g., cakes, muffins, refrigerated doughs).
- pH Control: Maintains acidity in processed cheeses, potato products, and canned seafood.
- Emulsifier & Stabilizer: Improves texture in puddings, whipped toppings, and meat products.
- Water Treatment
- Corrosion Inhibitor: Prevents scale formation in boilers and cooling towers.
- Metal Sequestrant: Binds iron and manganese to prevent discoloration in drinking water.
- Oil & Gas Industry
- Drilling Fluid Additive: Controls viscosity and prevents clay swelling.
- Cleaning Products
- Dishwasher Detergent: Softens water and enhances cleaning efficiency.
- Textile Industry
- Dyeing Auxiliary: Stabilizes hydrogen peroxide in bleaching processes.
- Industrial Applications
- Electroplating: Regulates bath pH and improves metal deposition.
Secondary Uses
- Concrete Setting
- Retarder: Slows cement hydration in hot climates.
- Pet Food
- Preservative & Texture Modifier: Extends shelf life and improves palatability.
- Photography
- Developer Component: Adjusts pH in photographic solutions.
- Ceramics
- Deflocculant: Aids in slurry viscosity control.
- Fire Retardants
- Synergist: Enhances flame resistance in materials.
- Pharmaceuticals
- Excipient: Used in effervescent tablets.
1. Basic Identification Attributes
- Chemical Name (IUPAC): Disodium dihydrogen diphosphate.
- Common/Trade Names: SAPP, Pyrophosphate.
- CAS Number: 7758-16-9.
- HS Code: 2835.39.00.
- Synonyms: Disodium pyrophosphate, Diphosphoric acid disodium salt.
2. Physical & Chemical Properties
- Physical State: White powder or granules.
- Color & Odor: White; odorless.
- Melting Point: Decomposes at 220°C.
- Solubility: Soluble in water (12 g/100 mL at 20°C).
- Density: 1.86 g/cm³.
- pH: 3.5–4.5 (1% solution).
3. Safety & Hazard Attributes
- GHS Classification: May cause skin/eye irritation (H315, H319).
- Toxicity: Low (LD₅₀ > 2,000 mg/kg oral, rat).
- Exposure Limits: Avoid dust inhalation; TWA 5 mg/m³ (respirable dust).
4. Storage & Handling Attributes
- Storage Conditions: Cool, dry place; keep sealed to prevent moisture absorption.
- Container Type: Polyethylene-lined bags or drums.
- Shelf Life: 2+ years if stored properly.
- Handling Precautions: Use gloves, goggles, and dust masks.
5. Regulatory & Compliance Attributes
- Food-Grade: FDA 21 CFR 182, EU E450i, JECFA compliant.
- Industrial: REACH registered; meets NSF/ANSI Standard 60 for water treatment.
6. Environmental & Health Impact
- Biodegradability: Not readily biodegradable.
- Ecotoxicity: Low; avoid excessive release into waterways.
- Disposal: Follow local regulations for inorganic salts.
Safety Handling Precautions
PPE Required:
- Gloves (nitrile/neoprene), goggles, dust mask, and protective clothing.
Handling Guidelines:
- Use in well-ventilated areas; avoid dust generation.
- Do not eat, drink, or smoke during handling.
Storage Measures:
- Keep in tightly closed containers, away from moisture and incompatible materials (acids, oxidizers
First Aid Measures
- Inhalation: Move to fresh air; seek medical attention if coughing persists.
- Skin Contact: Wash with soap and water.
- Eye Contact: Rinse with water for 15 minutes; consult a doctor.
- Ingestion: Rinse mouth; drink water; do not induce vomiting.
Firefighting Measures
- Fire Hazards: Non-flammable.
- Extinguishing Media: Water, foam, dry chemical.
- Hazardous Combustion Products: Phosphorus oxides (if decomposed at high temps).
Related products
Ammonium Bicarbonate
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Citric Acid Monohydrate
Citric Acid Monohydrate is a white, crystalline powder or granule form of citric acid containing one molecule of water per molecule of acid. It is a natural organic acid commonly derived from citrus fruits or produced by fermentation processes. Citric Acid Monohydrate is widely used as an acidulant, preservative, and chelating agent in various industries. Compared to the anhydrous form, it has a slightly lower acid concentration due to the water molecule but offers excellent solubility and stability. It is prized for its sour flavor, buffering capacity, and ability to bind metal ions, making it indispensable in food, pharmaceutical, cosmetic, and industrial applications.
Dicalcium Phosphate Dihydrate
Dicalcium Phosphate Dihydrate (DCP Dihydrate) is an odorless, white crystalline powder or granule composed of calcium and phosphate in a hydrated form. It is widely used in the pharmaceutical, food, animal feed, and industrial sectors. It serves as a calcium and phosphorus supplement, excipient, and abrasive agent, valued for its stability, bioavailability, and neutral taste. DCP Dihydrate complies with various pharmacopeial standards (e.g., USP, BP, FCC) depending on the grade.
Glycerol Monostearate Flakes
Glycerol Monostearate Flakes is a white to off-white waxy flake form emulsifier composed of 40% monoglycerides of fatty acids, primarily stearic and palmitic acids, combined with other glycerides and esters. Derived mainly from vegetable oils, this food-grade emulsifier is widely utilized in food, cosmetic, pharmaceutical, and industrial sectors for its multifunctional properties. GMS 40% flakes serve as effective emulsifiers, stabilizers, anti-caking agents, and texture enhancers, with excellent compatibility and versatility in formulations requiring semi-solid or solid fats.
Maninitol BP
Maninitol BP is a white, crystalline, sugar alcohol derived from mannose, widely used in pharmaceutical, food, and cosmetic industries. It functions as a sweetener, humectant, and excipient. Mannitol BP is non-hygroscopic and has low sweetness compared to sucrose, making it ideal for sugar-free formulations. It is commonly employed in tablet manufacturing as a filler and binder, and in medical settings as an osmotic diuretic to reduce intracranial pressure. The British Pharmacopoeia (BP) grade ensures compliance with pharmacopeial standards for purity and quality.
Sodium Citrate
Sodium Citrate is the sodium salt of citric acid, available as a white, crystalline powder or granules. It functions primarily as a buffering agent, acidity regulator, and sequestrant in food, pharmaceutical, and industrial applications. It helps maintain pH stability, enhances flavor, and prevents metal ion-induced spoilage. The 25kg packaging is typical for bulk industrial or food processing use.
Sodium Hexametaphosphate Food Grade
Sodium Hexametaphosphate Food Grade is a white, granular or powdery inorganic compound composed of sodium and metaphosphoric acid polymers. It is highly soluble in water and acts as an effective sequestrant, dispersing agent, and water softener. SHMP is widely used across various industries including food processing, water treatment, detergents, ceramics, and metallurgy. It helps control hardness, prevent scale formation, and stabilize formulations, making it valuable in both industrial and consumer applications.
Sodium Tripolyphosphate
Sodium Tripolyphosphate (STPP), chemical formula Na₅P₃O₁₀, is a white, granular or powdery inorganic compound widely used as a sequestrant, dispersant, and detergent builder. This 25kg packaged product is highly soluble in water, forming alkaline solutions that effectively soften water by chelating calcium and magnesium ions. Its excellent emulsifying and dispersing properties make it an essential ingredient in detergents, water treatment, food processing, and industrial cleaning applications.
