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Product Name: Sodium Phosphate Monobasic Monohydrate
Synonyms: Sodium dihydrogen phosphate monohydrate, Monosodium phosphate, MSP
CAS Number: 10049-21-5
Molecular Formula: NaH2PO4·H2O
Recommended Use: Laboratory chemicals, water treatment, food additive, buffer solutions, cleaning agents
Supplier Details: Manufacturer and distributor details, including address, phone number, and emergency contact
Emergency Telephone: 24-hour CHEMTREC number or national poison center
Classification: Not classified as hazardous under GHS criteria for most uses, though some irritation might occur on contact or inhalation
Label Elements: No pictogram required; precautionary advice on handling and eye protection
Physical Hazards: Can cause slippery conditions if spilled on floors, increases slip and fall risk
Health Hazards: May cause mild irritation to skin, eyes, and respiratory tract on frequent exposure; rarely leads to more serious symptoms except after large doses or prolonged exposure
Environmental Hazards: Not listed as environmentally hazardous, though excessive introduction to water sources might disrupt natural nutrient balances
Signal Word: None required, but caution advised
Chemical Name: Sodium Phosphate Monobasic Monohydrate
CAS Number: 10049-21-5
EC Number: 231-449-2
Percentage: Typically 99% or higher in pure laboratory and technical grades
Impurities: May include minor quantities of water and trace inorganic salts, usually not present in significant enough concentrations to require regulation or pose additional hazards
Inhalation: Remove the person to fresh air, support breathing if needed, seek medical advice for persistent irritation, usually exposure is limited to minor irritation
Skin Contact: Wash skin with plenty of soap and water, remove contaminated clothing, see physician if irritation continues
Eye Contact: Rinse cautiously with water for several minutes, remove contacts if comfortable and continue rinsing, seek medical help if discomfort persists
Ingestion: Rinse mouth, do not induce vomiting, offer water to drink, seek medical attention in case of discomfort or large quantity swallowed
Most Important Symptoms: Mild skin, eye, or respiratory irritation might occur, with redness and discomfort being the main signs
Advice for Medical Responders: Treat based on symptoms, no specific antidote exists
Suitable Extinguishing Media: Water spray, carbon dioxide, dry chemical powder, foam
Unsuitable Media: None documented as incompatible, normal precautions apply
Specific Hazards: Product itself is not flammable, may produce irritating or toxic fumes including oxides of phosphorus and sodium when exposed to intense heat or fire
Protective Equipment for Firefighters: Standard self-contained breathing apparatus (SCBA) and full protective gear recommended to avoid smoke exposure
Firefighting Instructions: Cool surrounding containers with water to prevent overheating and potential decomposition
Personal Precautions: Use protective gloves, avoid dust formation, ventilate area, keep unnecessary personnel out, avoid slip hazards from spilled powder or solution
Environmental Precautions: Limit entry into drains, surface water, or soil, recover as much material as possible, inform authorities if large spills threaten water supplies
Containment and Cleanup: Sweep or vacuum up product using non-sparking tools, collect in suitable container for re-use or disposal, wash spillage area with plenty of water
Methods for Cleaning Up: Dampen the powder for easier collection, prevent dusting, dispose of cleanup materials in compliance with local regulations
Safe Handling: Avoid dust generation, avoid inhalation or long direct skin contact, handle with gloves and safety glasses, wash thoroughly after handling
Storage Conditions: Store in tightly closed containers, in a cool, dry, well-ventilated area, away from acids and moisture sources
Incompatible Materials: Strong acids (liberate phosphoric acid), sources of ignition, aluminum and magnesium metals (may react at elevated temperature), oxidizers
Storage Life: Stable for long durations if kept dry, check for clumping or hardening due to moisture absorption
Exposure Limits: No specific occupational exposure limits set for sodium phosphate monobasic monohydrate, handle within general dust limits (e.g., OSHA PEL for particulates not otherwise regulated is 15 mg/m3 TWA)
Engineering Controls: Use local exhaust ventilation to reduce dust formation, ensure eyewash stations are nearby
Personal Protective Equipment: Safety glasses or chemical splash goggles, gloves made from nitrile or PVC, lab coat or apron, NIOSH-approved dust respirator if airborne dust approaches threshold limit
Hygiene Measures: Wash hands after handling, avoid eating, drinking, or smoking in work area, remove contaminated clothing and wash before reuse
Appearance: White crystalline powder or granules
Odor: Odorless
Odor threshold: Not applicable
pH: (1% solution at 25°C) ~4.5
Melting Point/Freezing Point: Begins to lose water of crystallization at about 60°C, decomposes above 100°C without melting
Boiling Point: Decomposes before boiling
Flash Point: Not flammable
Evaporation Rate: Not applicable
Flammability: Nonflammable solid
Explosive Limits: Not explosive
Vapor Pressure: Not significant
Relative Density: 2.04 g/cm3
Solubility in Water: Highly soluble (>80 g/100 g at 20°C)
Partition Coefficient (n-octanol/water): Not applicable
Auto-ignition Temperature: Not available
Decomposition Temperature: >100°C
Viscosity: Not applicable
Chemical Stability: Stable at room temperature in dry, sealed containers
Reactivity: Reacts with strong acids, releasing phosphoric acid and heat, hydrolyzes easily with moisture
Hazardous Reactions: With strong acids or metals such as aluminum and magnesium (at high temperatures) may produce flammable hydrogen
Conditions to Avoid: Excess moisture, strong heating, storage near incompatible substances
Decomposition Products: Sodium oxides, phosphorus oxides, phosphoric acid on strong heating
Polymerization: Does not occur
Acute Toxicity: Oral LD50 in rats reported at >17,800 mg/kg, classifies as low acute oral toxicity
Skin Corrosion/Irritation: May cause mild, temporary irritation; not corrosive
Serious Eye Damage/Irritation: Dust or solution can give transient eye irritation; permanent injury very unlikely
Respiratory or Skin Sensitization: No confirmed sensitizing properties
Chronic Effects: Long term repeated exposure to high concentrations might disrupt electrolyte balance; usually not encountered in normal usage
Carcinogenicity, Mutagenicity, Reproductive Toxicity: Not classified as carcinogenic or mutagenic, no reproductive toxicity data suggestive of hazard
Other Information: Product is a common food additive at low concentrations; higher doses should be avoided
Ecotoxicity: Not classified as hazardous to aquatic environments at usual discharge rates, but high concentrations can stimulate algal growth and disrupt natural phosphorus cycles
Persistence and Degradability: Dissolves and disassociates fully in water into sodium and phosphate ions, widely present in nature
Bioaccumulative Potential: Does not bioaccumulate
Mobility in Soil: Highly mobile in aqueous environments due to high solubility
Other Adverse Effects: Large releases can contribute to eutrophication if discharged into waterways; responsible waste handling matters to prevent this impact
Waste Treatment Methods: Collect unused material for approved landfill or incineration according to local, regional, national, or international regulations
Contaminated Packaging: Rinse containers well before recycling or disposal, observe all legal requirements
Waste Codes: Not classified as hazardous waste under US RCRA or EU directives, though local rules might apply
Environmental Caution: Prevent large releases to waterways; small quantities rinsed away with much water typically present minimal risk
UN Number: Not regulated for transport under ADR, IMDG, IATA
Proper Shipping Name: Sodium Phosphate Monobasic Monohydrate
Transport Hazard Class: Not classified as dangerous
Packing Group: Not applicable
Environmental Hazards: None specified for bulk shipment
Special Precautions: Protect packages from rain and rough handling, avoid damage to containers during transit
Regulatory Information: Not subject to bulk hazardous material shipping regulations
OSHA Status: Not hazardous under US OSHA Hazard Communication Standard
TSCA Inventory: Listed
EU REACH Status: Registered, not classified as SVHC
WHMIS in Canada: Not listed as controlled
Food Additive Status: Approved for food use in many countries under specific guidelines
Other Listings: Covered under relevant chemical inventory lists worldwide (e.g., AICS, ENCS, DSL, PICCS)
Labeling Requirements: General chemical safety recommendations; no specific hazard phrases for standard use
