Product Name: Sodium Tripolyphosphate, Food Grade
Chemical Formula: Na5P3O10
Chemical Family: Inorganic phosphate
Recommended Use: Food additive (emulsifier, water retention agent, preservative); industrial use in detergents and cleaners
SYNONYMS: STPP, Pentasodium triphosphate, Triphosphoric acid pentasodium salt
CAS Number: 7758-29-4
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Hazard Classification: Irritant
Label Elements: Warning, causes serious eye irritation, may cause mild skin irritation, avoid inhalation of dust
GHS Signal Word: Warning
Hazard Statements: May irritate eyes, skin, respiratory tract upon exposure; dust may aggravate existing respiratory conditions
Precautionary Statements: Wear protective gloves and goggles, avoid dust inhalation, keep container closed
Hazard Pictograms: Exclamation mark (irritant)
Chemical Name: Sodium Tripolyphosphate
Concentration: At least 94% purity for food grade use; minor impurities may include sodium diphosphate, sodium orthophosphate
Ingredients: Sodium Tripolyphosphate 94-97%
CAS Number: 7758-29-4
Inhalation: Move individual to fresh air, seek medical attention if breathing difficulty persists
Skin Contact: Wash affected area with plenty of water and mild soap; seek medical help for continued irritation
Eye Contact: Rinse eyes immediately with water for at least 15 minutes, hold eyelids open, consult medical care for ongoing irritation
Ingestion: Rinse mouth, drink water, seek advice from a healthcare professional if discomfort continues
Important Symptoms: Redness or pain in eyes or skin, coughing, shortness of breath when inhaled
Flammability: Not flammable
Explosion Hazard: Does not pose explosion risk
Suitable Extinguishing Media: Use any standard extinguisher for surrounding fire (water spray, foam, dry chemical, CO2)
Protective Equipment for Firefighters: Self-contained breathing apparatus and full protective clothing
Hazardous Combustion Products: May produce sodium oxides and phosphorus oxides at high temperatures
Special Procedures: Avoid dust formation; prevent runoff into waterways
Personal Precautions: Use suitable dust mask, gloves, protective eyewear
Environmental Precautions: Keep out of sewers, drains, natural water bodies
Clean-Up Methods: Sweep up material and place in suitable container for disposal; avoid generating dust
Decontamination: Flush area with water after most material picked up
Notification: Follow local requirements for reporting significant spills
Handling: Work in well-ventilated space, minimize dust, avoid skin and eye contact, keep away from incompatible materials (strong acids)
Hygiene Practices: Wash hands thoroughly before eating or drinking
Storage Conditions: Store in cool, dry place; keep tightly closed, protect from moisture
Packaging: Use containers that prevent moisture absorption and contamination
Incompatible Materials: Strong acids, reducing agents
Exposure Limits: No established exposure limits for food-grade STPP; keep dust below nuisance particulate limits (typically 10 mg/m³)
Ventilation: Local exhaust for dusty operations
Respiratory Protection: Dust mask or respirator if exposure threshold exceeded
Gloves: Chemical-resistant gloves recommended
Eye Protection: Safety goggles or face shield
Skin Protection: Standard work clothing, closed shoes
Appearance: White granular powder or crystalline solid
Odor: Odorless
pH (1% solution): 9.2 – 10.0
Melting Point: Above 600°C (decomposes)
Solubility in Water: 14% at 25°C
Specific Gravity: 2.52 (water=1)
Vapor Pressure: Not applicable
Boiling Point: Decomposes before boiling
Other Properties: Non-combustible, hygroscopic
Chemical Stability: Stable under normal storage and handling
Conditions to Avoid: Contact with moisture, strong acids, excessive heat
Hazardous Reactions: Reacts with acids to release phosphoric acid
Decomposition Products: Produces sodium oxides, phosphorus oxides at high temperatures
Polymerization: Will not occur
Acute Toxicity: Low oral toxicity, LD50 (rat): 3,120 mg/kg
Skin Irritation: May cause minor to moderate irritation on prolonged contact
Eye Irritation: Causes redness, discomfort, possible corneal inflammation
Chronic Effects: No known chronic toxicity at normal exposure
Inhalation Risks: Nuisance dust, can aggravate asthma
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, or OSHA
Other Health Risks: Prolonged repeated exposure to high dust concentrations can irritate mucous membranes
Environmental Impact: May cause eutrophication if released into surface waters; phosphates encourage algal growth
Mobility in Soil: Readily soluble, moves with water runoff, binds to soil minerals
Persistence and Degradability: Inorganic compound, not biodegradable
Bioaccumulation: Not likely to bioaccumulate
Ecotoxicity: Harmful in large quantities to aquatic environments due to phosphate
Aquatic Toxicity: LC50 (fish): >100 mg/L (low acute toxicity)
Waste Handling: Do not discharge to surface water, storm drains, or soil
Disposal Methods: Dispose of through licensed waste disposal contractor, following local and national regulations
Empty Container Precautions: Containers may retain residues, rinse thoroughly before discarding or recycling
Recycling: Not practical for contaminated product; recycle only clean, unused material
UN Number: Not classified as a dangerous good
Hazard Class: None
Proper Shipping Name: Not regulated
Packing Group: None
Transportation Precautions: Use dry, sealed packaging to prevent spills or moisture exposure
Special Provisions: Avoid mechanical impact that could break packaging, avoid shipment with incompatible materials
Food Grade Approval: Approved by FDA (21 CFR 182.1810) as a direct food additive, subject to use limits
Other Regulations: Listed under EINECS (231-838-7), REACH registered
Workplace Regulations: Use under Good Manufacturing Practices; regulated for dust exposure under OSHA Particulates Not Otherwise Regulated (PNOR)
SARA Title III: Not a Section 313 listed chemical
TSCA Status: Listed
Labeling: Follow local, national labeling and safety data requirements for food additives
