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Product name: Sodium Phosphate Dibasic Heptahydrate
Chemical formula: Na2HPO4·7H2O
CAS Number: 7782-85-6
EC Number: 231-448-7
Synonyms: Disodium hydrogen phosphate heptahydrate
Recommended use: Laboratory reagent, water treatment, food additive, detergent production
Supplier information: Address, emergency phone number, contact details always included with shipment documents for user follow-up.
GHS Classification: Not classified as hazardous according to GHS criteria
Physical hazards: No significant physical hazards identified
Health hazards: May cause mild eye or skin irritation, dust inhalation can bring on throat, nose, and lung discomfort
Environmental hazards: Not classified as hazardous for the environment, but large releases may alter water pH
Signal word: Not required
Hazard statements: Not appreciated as a high hazard substance; precautions focus on managing minor irritation
Chemical name: Disodium hydrogen phosphate heptahydrate
Common name: Sodium phosphate dibasic heptahydrate
Concentration: Above 98% purity
Impurities: Trace sodium chloride, minor water-insoluble material possible
CAS number: 7782-85-6
Other components: Product does not use stabilizers or mixture of hazardous substances
Eye contact: Flush eyes steadily using water for no less than 15 minutes; pull eyelids apart gently, check for lens removal
Skin contact: Rinse skin thoroughly with running water and mild soap, remove contaminated clothes, consult doctor if redness
Inhalation: Move affected person into fresh air; ease of breathing often improves without intervention, medical advice only for persistent symptoms
Ingestion: Rinse mouth, offer water to drink, avoid forced vomiting, seek professional care in case of significant discomfort
Notes to physicians: No unique antidote or hazard, treat sensibly based on presented irritation
Suitable extinguishing media: Water spray, foam, dry chemical, or carbon dioxide; material does not contribute fuel
Specific hazards: Compound itself does not burn; thermal decomposition may release sodium oxides and phosphate fumes
Protective equipment: Wear standard full gear: helmet, boots, gloves, and self-contained breathing apparatus
Unusual fire risks: Containers exposed to heat may rupture, do not remain in vapor cloud or smoke
Special precautions: Keep away from direct flames, keep packages cool using water mist if safe
Personal precautions: Slip hazard if spilled on smooth floors, use non-slip footwear, avoid raising dust with brooms
Protective equipment: Gloves, safety goggles, dust mask for spill cleanup; avoid ingestion or inhalation of powder
Environmental precautions: Keep substance away from drains and waterways, sweep up solid material, minimize runoff
Cleanup methods: Sweep or vacuum without stirring up dust, shovel into sealed, marked containers, wash down residue with water
Notification procedures: Not subject to strict reporting but monitor for large quantities getting into waterways
Handling advice: Manage containers with care, avoid generating dust, wash hands after use, minimize contact with eyes or skin
Training needs: Train staff to recognize powder exposure and first aid, emphasize personal hygiene during handling
Storage requirements: Store in a dry, cool, and ventilated area, use sealed plastic or lined steel drums, segregate from strong acids
Incompatibilities: Keep clear of moisture, acids, and oxidizers that can alter chemical stability or promote breakdown
Special rules: Do not store alongside food or feed, label all storage vessels correctly and restrict access to trained users
Permissible limits: No established OSHA, ACGIH, or NIOSH exposure limit, prudent practice calls for dust minimization
Engineering controls: Use process enclosure, local exhaust, or other engineering means to keep airborne dust below nuisance levels
Personal protective equipment: Safety glasses or goggles, chemical-resistant gloves (nitrile or neoprene), approved dust respirator in poorly ventilated settings
Hygiene measures: Avoid eating, drinking, or smoking in areas where material used; wash hands and face after handling
Environmental controls: Use containment during transfer or mixing, inspect exhaust systems regularly for dust buildup
Appearance: White, crystalline powder or granules
Odor: Odorless
Odor threshold: Not applicable
pH: About 9.0 (5% solution in water)
Melting point/freezing point: Loses water of crystallization at approximately 48 °C; decomposes before melting
Boiling point/range: Not applicable, decomposes
Flash point: Not flammable
Evaporation rate: Not volatile
Flammability: Not classified as flammable
Vapor pressure: Not applicable
Vapor density: Not applicable
Relative density: About 1.68 g/cm³
Solubility in water: Easily dissolves in water
Partition coefficient: Not measured
Decomposition temperature: Begins above 48 °C with water loss
Appearance stability: Remains chemically stable in sealed containers for at least two years
Chemical stability: Remains stable under recommended storage, especially in dry, controlled environments
Reactivity: Inert to air under ambient conditions; strong acids produce heat and phosphoric acid
Hazardous reactions: Avoid contact with reactive metals or strong acids, as hydrogen gas, heat, or acidic vapors can evolve
Decomposition products: Releases sodium oxide and phosphorus oxides under high heat
Polymerization: Will not undergo hazardous polymerization
Conditions to avoid: Prevent exposure to excessive heat, moisture, and incompatible substances like concentrated acids
Likely routes of exposure: Inhalation, ingestion, skin and eye contact
Acute toxicity: Low acute toxicity, LD50 (oral, rat): 17,000 mg/kg shows low likelihood of poisoning in humans
Skin corrosion/irritation: Dryness or mild irritation may occur with frequent or prolonged skin exposure
Serious eye damage/irritation: Causes minor but reversible irritation
Respiratory effects: Dust may bring temporary discomfort in the upper respiratory tract
Chronic effects: Not known to cause long-term effects; excessive intake over time may affect blood chemistry
Sensitization: Not recognized as a skin or respiratory sensitizer
Germ cell mutagenicity: No evidence of genetic hazard
Carcinogenicity/Reproductive toxicity: Not classified as carcinogen or reproductive toxin
Symptoms: Sore throat, coughing, mild stomach upset, skin or eye redness may develop from intense or accidental exposure
Ecotoxicity: Not considered toxic to aquatic life in regular quantities; excessive release can boost nutrient load and disturb aquatic balance
Persistence and degradability: Dissolves rapidly in water, does not persist as a distinct pollutant, subject to natural dilution
Bioaccumulative potential: Low, does not build up in aquatic food chain
Mobility in soil: Highly mobile in water, easily transported through water flow; will not bind strongly to soil
Other adverse effects: High concentrations may change water pH, potentially harming aquatic creatures if released unchecked
Waste treatment methods: Dispose of small amounts in regular waste, dilute large quantities with copious water before disposal; avoid unmonitored disposal to waterways
Container disposal: Rinse thoroughly, crush or render unusable, deposit with approved landfill or recycling center
Local regulations: Consult local waste management and environmental authorities, follow municipal and environmental protection agency rules
Reuse and recycling: Reuse clean product if possible, minimize waste through careful storage and inventory control
Precautionary handling: Wear protective gear during waste handling, limit dust formation, mark waste vessels clearly
UN number: Not regulated as dangerous good
Proper shipping name: Sodium Phosphate Dibasic Heptahydrate
Transport hazard class: Not classified
Packing group: Not required
Environmental hazards: Keep dry to limit spills, avoid transport together with foodstuffs
Special transport precautions: Check all packages for tight seal, use secondary containment during shipping whenever possible
US TSCA: Listed on Toxic Substances Control Act inventory
EU REACH: Registered, not classified as hazardous
SARA Title III (Sections 311/312): Not reportable as a hazardous compound
WHMIS Classification (Canada): Not controlled
Other regulations: Product appears in food and water treatment guidelines; always follow local, state, and national regulations for workplace use and disposal
Label requirements: Maintain label integrity on every container; workplace training on hazard, first aid, and accident prevention procedures recommended, even for low-hazard substances
