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Product Name: Sodium Dihydrogen Phosphate
Synonyms: Monosodium Phosphate, Sodium Phosphate Monobasic
Chemical Formula: NaH2PO4
Molecular Weight: 119.98 g/mol
CAS Number: 7558-80-7
Recommended Uses: Laboratory reagent, industrial chemical, food additive
Supplier Contact: Emergency contact details provided on request; company phone and address required for regulatory compliance and communication
Signal Word: Warning
GHS Classification: Eye Irritation Category 2A, Skin Irritation Category 2
Hazard Statements: Causes serious eye irritation; May cause mild skin irritation
Pictograms: Exclamation mark (GHS07)
Precautionary Statements: Avoid contact with eyes, skin, and clothing. Wear protective gear such as safety goggles and gloves. Wash hands thoroughly after handling.
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Target Organs: Eyes, skin, respiratory tract
Chemical Name: Sodium Dihydrogen Phosphate
Common Name: Monosodium Phosphate
Concentration: Typically 98% minimum purity
CAS Number: 7558-80-7
Impurities: Trace amounts of other sodium phosphates possible, generally less than 2%
Eye Contact: Rinse with plenty of water for at least 15 minutes; hold eyelids apart; seek medical attention if irritation persists.
Skin Contact: Wash thoroughly with soap and water; remove contaminated clothing; see a doctor for lasting irritation or burns.
Inhalation: Move to fresh air; seek medical attention for continued difficulty breathing or irritation.
Ingestion: Wash mouth out with water; do not induce vomiting; seek prompt medical advice.
Most Important Symptoms: Redness, pain, watering eyes, mild skin irritation, sore throat if inhaled
Suitable Extinguishing Media: Use water spray, dry chemical powder, or carbon dioxide; sodium dihydrogen phosphate is non-flammable.
Hazards from Combustion: Releases fumes of sodium oxides and phosphorus oxides at high temperatures.
Special Protective Equipment: Firefighters should wear full protective clothing, including self-contained breathing apparatus.
Specific Hazards: Thermal decomposition could produce irritating and toxic gases.
Personal Precautions: Secure area, keep unprotected persons away; wear appropriate protective equipment such as gloves, goggles, and mask.
Environmental Precautions: Prevent entry to waterways and drains; avoid further spillage where possible.
Cleanup Methods: Sweep up spilled material; place in a suitable container for disposal; ventilate area and wash contaminated surface with plenty of water.
Disposal: Follow local regulations for chemical waste; never dispose of in normal waste streams.
Handling: Minimize dust generation; avoid contact with skin and eyes; always wear appropriate personal protective equipment.
Storage Conditions: Store in a tightly closed container in a cool, dry, and well-ventilated area.
Incompatibilities: Keep away from strong oxidizing agents and strong bases.
Safe Transfer: Use clean, dry equipment to prevent contamination and accidental reaction.
Occupational Exposure Limit: No occupational exposure limits assigned for sodium dihydrogen phosphate by OSHA, ACGIH, or NIOSH.
Engineering Controls: Use local exhaust ventilation to control airborne dust and particles.
Personal Protective Equipment: Safety goggles, lab coat, gloves resistant to chemicals, dust mask for large-scale handling.
Hygiene Measures: Wash hands before breaks and after handling; do not eat or drink near chemical use areas.
Appearance: White crystalline powder or granular solid
Odor: Odorless
Melting Point: 60°C (dehydrates above 100°C)
Boiling Point: Decomposes before boiling
Solubility: Soluble in water (approx. 82 g/100 mL at 25°C), insoluble in alcohol
pH (10% solution): 4.5 – 5.5
Vapor Pressure: Not applicable
Density: About 2.04 g/cm³
Partition coefficient (n-octanol/water): Not applicable
Other Properties: Stable under recommended storage and handling conditions
Chemical Stability: Stable under normal temperatures and conditions of storage
Incompatible Materials: Reacts with strong bases producing disodium phosphate, and with strong oxidizers
Conditions to Avoid: Excessive heat, moisture
Hazardous Decomposition Products: Sodium oxides, phosphorus oxides
Hazardous Polymerization: Not known to occur
Acute Toxicity: Oral LD50 (rat): ~17,800 mg/kg; not classified as toxic in small quantities
Skin Irritation: May cause mild irritation upon prolonged exposure
Eye Irritation: Causes notable irritation; may cause pain and redness
Inhalation: Prolonged or high-level exposure can cause throat irritation, coughing
Chronic Effects: No known significant effects with standard occupational use
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, or OSHA
Additional Data: No mutagenic, reproductive, or teratogenic effects detected in animal studies
Ecotoxicity: Not known to be toxic to aquatic life in normal industrial concentrations
Persistence and Degradability: Readily dissociates in water; phosphate ions are naturally occurring; high concentrations may cause eutrophication
Bioaccumulation Potential: Not expected to bioaccumulate; low log Kow value
Mobility in Soil: High mobility due to solubility in water; can move to groundwater
Other Adverse Effects: Large releases into bodies of water could stimulate algal blooms, impacting oxygen balance
Waste Treatment Methods: Residues and non-recyclable solutions should be sent to a licensed chemical disposal company.
Disposal of Packaging: Containers should be rinsed and disposed of in accordance with local regulations.
Environmental Release: Do not discharge waste into the sewer or environment without local authority permission.
Other Notes: Comply with local, regional, and national waste management policies; work with hazardous waste contractors if necessary
UN Number: Not regulated
Proper Shipping Name: Not a hazardous material under transport regulations
Transport Hazard Class: Non-hazardous for all common transport modes
Packing Group: Not applicable
Special Precautions: Prevent container from damage or moisture ingress during handling and transit
Other Details: For bulk shipments, consult specific transport company requirements
US Regulations: Listed on TSCA inventory; not subject to specific federal reporting requirements.
International Inventories: Compliant with REACH, WHMIS, and considered non-hazardous for key regulatory bodies.
Label Requirements: Follow GHS and OSHA standards for labeling if in workplaces.
Other Regulation Information: No special restrictions on sale, handling, or transport in major jurisdictions; check regional guidelines due to phosphate use in water-sensitive environments.
