Product Name: Monosodium Phosphate
Chemical Formula: NaH2PO4
Synonyms: Sodium dihydrogen phosphate, Sodium phosphate monobasic
CAS Number: 7558-80-7
Recommended Use: Widely used in water treatment, food processing, textiles, detergents, and laboratory chemicals
Manufacturer/Supplier: Listed manufacturer contact information usually found on commercial packaging
Emergency Phone: Emergency numbers should appear on product packs for local authorities and poison centers
Address: Business address where the supplier or distributor operates
Classification: Typically classified as non-hazardous under most GHS criteria, though high concentrations can irritate skin, eyes, and the respiratory tract
Label Elements: No standardized hazard pictograms typically required; some products may include an exclamation mark for mild irritation
Signal Word: Some MSDS sheets call for "Warning" to flag minor health hazards
Hazard Statements: Causes irritation to eyes, skin, and mucous membranes
Precautionary Statements: Avoid breathing dust; wash hands thoroughly after handling; wear protective gear like gloves and goggles
Routes of Exposure: Eye and skin contact, inhalation of dust, accidental ingestion
Chemical Name: Sodium dihydrogen phosphate
Common Name: Monosodium phosphate
Concentration: Generally 98–100% as commercial grade
CAS Number: 7558-80-7
Impurities: Small traces of related phosphates and sodium chloride can be present from the manufacturing process, usually less than 0.5%, which do not shift overall classification
Eye Contact: Rinse with plenty of clean water for at least 15 minutes and remove contact lenses if worn, seeking medical attention if discomfort or redness continues
Skin Contact: Wash area with mild soap and water; discard contaminated clothing and contact a doctor if irritation appears
Ingestion: Rinse mouth well and drink water if conscious; avoid forcing vomiting; call for medical advice immediately, especially for children
Inhalation: Move person to fresh air; keep comfortable for breathing; seek medical evaluation if coughing, shortness of breath, or discomfort persists
Extreme Exposures: No widespread reports of severe poisoning, but immediate professional attention remains standard
Suitable Extinguishing Media: Use water spray, dry chemical, or carbon dioxide for surrounding fire
Unsuitable Extinguishing Media: None known for the product itself; avoid high-volume water jets that might spread dust
Specific Hazards: Product itself does not support combustion, but can release phosphate fumes if heated extremely
Protective Equipment: Firefighters should wear full gear including self-contained breathing apparatus to avoid dust or fumes
Thermal Decomposition Products: At very high temperatures, toxic phosphate fumes, sodium oxides, and irritant gases can form
Personal Precautions: Avoid contact with skin, eyes, and inhaling dust; ventilate area; wear protective gloves and goggles
Environmental Precautions: Sweep or shovel up to avoid entry into drains, water systems, or soil that could cause local modification in pH
Cleanup Methods: Sweep or vacuum up spillage and move to suitable disposable container; wash area with plenty of water
Handling of Residue: Avoid generating dusty clouds; put waste in clearly labeled containers for disposal based on local regulation
Handling: Use in well-ventilated spaces to minimize dust accumulation; avoid eating, drinking, or smoking during use; keep containers tightly closed when not being used; use mechanical means to move large amounts to cut back on physical exposure
Storage Conditions: Store in cool, dry, and well-ventilated places in sealed containers, protected from moisture; keep away from incompatible products like strong alkalis, acids, or oxidizers; avoid storage in damp spaces as the material absorbs moisture and may cake
Packaging: Use original packaging or containers resistant to corrosion and compatible with phosphates
Special Precautions: Write clearly on labels, and keep safety instructions near storage shelves or tanks
Control Limits: No established occupational exposure limits for MSP in most regulations; keeping dust exposure below nuisance level is best
Engineering Controls: Use local exhaust ventilation, dust collection systems, or enclosed systems where possible
Personal Protective Equipment: Wear chemically resistant gloves (such as nitrile), goggles or safety glasses, dust masks or particulate respirators if airborne dust is present
Environmental Controls: Prevent run-off into drains or waterways; control ventilation to manage indoor air quality
Hygiene: Wash hands after use; keep food and drink separate from work area
Special Situations: Provide safety showers/eyewash stations in areas of frequent or large-scale handling
Appearance: White, crystalline powder or granules
Odor: Odorless
Melting Point: Roughly 190°C (374°F) with decomposition
Boiling Point: Not applicable (decomposes on heating rather than boiling)
Solubility: Soluble in water, forming mildly acidic solutions
Density: About 2.04 g/cm³ at 20°C
pH (1% Solution): Typically ranges from 4.4 to 4.6
Flash Point: Not flammable
Vapor Pressure: Not volatile
Other Data: Stable under normal conditions if kept dry and sealed
Chemical Stability: Stable at normal temperatures and storage conditions
Conditions to Avoid: Avoid high humidity and wet environments, avoid open flames, extreme temperatures
Incompatible Materials: Strong alkalies and oxidizers, magnesium, calcium, and other reactive metals; reacts to form insoluble precipitates or irritating fumes in reaction with some acids
Hazardous Reactions: No dangerous polymerization; hazardous gas or fume production requires extreme thermal decomposition
Decomposition Products: Emits sodium oxide, phosphorus oxides, and possibly corrosive fumes if intensely heated
Acute Toxicity: Low toxicity by oral or dermal exposure; high quantities may cause gastrointestinal distress
Irritation: Dust irritates eyes, skin, mucous membranes, and the respiratory tract; repeated exposure can worsen symptoms
Sensitization: No known sensitization from industrial handling
Chronic Effects: Prolonged or excessive ingestion may disturb electrolytes or pH balance, rare in workplace settings
Carcinogenicity: Not listed as a carcinogen by ACGIH, IARC, NTP, or OSHA
Mutagenicity: No studies indicating genetic risk with occupational exposure
Others: No known systemic effects from short-term, routine use at recommended handling levels
Ecotoxicity: Not acutely toxic; can shift local water pH if released in large spills, which changes aquatic conditions
Persistence and Degradability: Inorganic salts do not degrade but dissolve readily and disperse
Bioaccumulation Potential: No significant potential for bioconcentration
Mobility in Soil: High mobility due to high water solubility; risk of local phosphate pollution if released uncontrollably
Other Environmental Effects: Runoff entering soil or water can promote algae growth and eutrophication, potentially upsetting ecosystems
Special Considerations: Avoid spills in sensitive areas; observe regional guidance on handling phosphates and nutrient runoff
Waste Disposal Methods: Sweep or scoop up waste for recycling or landfilling in compliance with local environmental and safety rules; do not mix with incompatible waste streams
Container Disposal: Rinse and break down packaging; handle as non-hazardous waste unless contaminated with other chemicals
Prohibited Disposal: Avoid direct release into drains or waterways
Other Comments: Local, regional, or state guidelines might put stricter controls on phosphate waste because of nutrient pollution concerns
UN Number: Not regulated for transport under UN ADR/RID, IMDG, and IATA codes
Proper Shipping Name: Not assigned any specific hazardous shipping name
Transport Hazard Class: Non-hazardous
Packing Group: None assigned
Special Precautions: Ship in tightly sealed bags or drums, protected from moisture or contaminants; label containers clearly
Other Information: Comply with standard load-securing, stacking, and labelling rules for chemical powders and avoid rough handling in transit to prevent spillage or dust release
TSCA Status: Listed on the Toxic Substances Control Act (TSCA) inventory
EU Regulations: Registered under REACH; not classified under Dangerous Substances Directive
Other Inventories: Generally listed on Australian AICS, Canadian DSL, Japanese ENCS, and similar regulatory lists
OSHA Hazard Class: Hazard Communication Standard considers it non-hazardous
SARA Title III: Not subject to SARA Title III reporting requirements
Labeling Requirements: Ordinary chemical labeling showing product name, CAS number, relevant warnings, precautions, and emergency contacts
Other Legal Points: Local sodium or phosphate discharge limitations may apply based on region due to nutrient pollution regulation in water streams
