Product Name: Disodium Phosphate
Chemical Formula: Na2HPO4
Common Names: DSP, Disodium Hydrogen Phosphate, Sodium Phosphate Dibasic
CAS Number: 7558-79-4
Manufacturer Information: [Insert Manufacturer Name, Address, and Emergency Contact Number]
Recommended Use: Used in water treatment, detergents, food additives, lab chemicals, boiler operations, textile dyeing
Product Code: [Insert if available]
GHS Classification: Eye Irritation, Category 2A; Not classified for most routes under standard GHS
Signal Word: Warning
Hazard Statement(s): Causes serious eye irritation, prolonged contact can irritate skin or, if inhaled, can cause irritation to the respiratory tract
Precautionary Statement(s): Wear eye protection, wash hands after handling, avoid breathing dust, do not eat or drink around product
Hazards Not Otherwise Classified: Dust may aggravate pre-existing lung conditions such as asthma
Chemical Name: Disodium Hydrogen Phosphate
CAS Number: 7558-79-4
Percent (%): 98-100
Impurities: Minor traces of sodium phosphate monobasic or tribasic possible, but not significant enough to alter properties if standards are followed
Eye Contact: Rinse thoroughly with water for several minutes. Remove contact lenses. Seek medical advice if irritation develops.
Skin Contact: Wash with plenty of soap and water, remove contaminated clothing, treat ongoing irritation with topical creams or consult a practitioner.
Inhalation: Move to fresh air, encourage slow breathing, seek medical attention for persistent symptoms.
Ingestion: Rinse mouth, drink plenty of water. Never induce vomiting unless directed by a professional, seek medical help if large quantities swallowed.
Flammability: Not flammable, but may emit toxic fumes in a fire (sodium oxide, phosphorus oxides).
Suitable Extinguishing Media: Use water spray, dry chemical, foam, carbon dioxide.
Unsuitable Extinguishing Media: None typically known for this material.
Special Protective Equipment: Firefighters should wear self-contained breathing apparatus and protective gear to guard against possible thermal decomposition products.
Personal Precautions: Use dust masks or respirators, safety goggles, and gloves. Avoid generating dust.
Environmental Precautions: Prevent spills from entering sewers, surface water, and soil as high phosphate concentrations can disrupt aquatic life.
Spill Cleanup Methods: Sweep up solid material. Place in appropriate container for disposal. Ventilate the area. Wash area with plenty of water.
Handling: Use in a well-ventilated area. Wear proper PPE, avoid ingestion, food and drink near workspace, minimize dust generation.
Storage: Keep container tightly closed, store indoors in a dry, cool, and well-ventilated space. Separate from acids and strong oxidizers. Ensure containers are well-labeled and not cracked.
Special Considerations: Hygroscopic material, keep desiccated if specification calls for anhydrous grade.
Occupational Exposure Limits: No specific OSHA, ACGIH, or NIOSH limits established. Use good workplace practices to avoid dust.
Engineering Controls: Local exhaust ventilation or general exhaust, keep dust levels below 10 mg/m3 total.
Personal Protection: Safety goggles, dust-resistant gloves, work clothing, dust mask or N95 if dust becomes excessive.
Hygiene Measures: Wash hands after use, no eating or drinking in handling area, wash soiled clothing regularly.
Appearance: White crystalline powder or granules
Odor: Odorless
pH (1% Solution): 8.0–11.0
Melting Point: About 250°C with decomposition
Boiling Point: Not applicable (decomposes before boiling)
Solubility in Water: Readily soluble, about 7g/100mL at 25°C
Density: 1.52 g/cm3
Molecular Weight: 141.96 g/mol
Vapor Pressure: Negligible at standard conditions
Other Properties: May cake if exposed to moisture, dusting occurs with rapid transfer
Chemical Stability: Stable under normal temperature and pressure.
Conditions to Avoid: Excess moisture, heat above 250°C, acids, and oxidizing agents.
Materials to Avoid: Strong acids (may form phosphoric acid releasing heat), strong oxidizers (could generate hazardous decomposition gases).
Hazardous Decomposition Products: Sodium oxides, phosphorus oxides under fire or high heat.
Polymerization: Does not occur under normal use.
Acute Toxicity: LD50 (oral, rat): >17,000 mg/kg (low toxicity).
Inhalation: May trigger coughing, sneezing, temporary respiratory discomfort at high concentrations.
Skin: Prolonged contact dries or mildly irritates skin in some people.
Eyes: Irritation, redness, tearing if granules or dust get in eyes.
Chronic Exposure: Repeated exposure may aggravate existing conditions like dermatitis or asthma.
Carcinogenicity/Ecotoxicity: Not listed as carcinogenic. Not expected to produce adverse reproductive, mutagenic, or long-term chronic effects at workplace exposure levels.
Aquatic Toxicity: High phosphate levels fuel algae blooms, which disrupt aquatic ecosystems.
Persistence and Degradability: Inorganic, persists in water systems until diluted or taken up by plants.
Bioaccumulation Potential: Low.
Mobility in Soil: High solubility moves through moist soils, may alter local nutrient balance.
Other Adverse Effects: Excess discharge leads to eutrophication in water bodies.
Waste Generation: Collect spillage and dust, avoid making slurry for disposal unless water treatment facilities available.
Disposal Methods: Dispose of in accordance with local, regional, and national regulations, often suitable for landfill unless contaminated.
Container Disposal: Rinse empty containers, remove labels, recycle or dispose where chemical residues permitted.
Limit Environmental Impact: Prevent leakage or runoff into streams or municipal water.
UN Number: Not regulated as hazardous for transport.
Proper Shipping Name: Disodium Hydrogen Phosphate or Disodium Phosphate
Transport Hazard Class: None
Packing Group: None
Environmental Hazards During Transport: Keep dry, sealed; do not allow large quantities to enter watercourses as it may trigger excessive algae growth.
Shipping Precautions: Use normal chemical hygiene, check integrity of packaging, label containers clearly.
Inventory Status: Listed in US TSCA, EU EINECS/ELINCS, Canadian DSL, Japanese ENCS, Australian AICS.
OSHA: Not classified as hazardous but handle with appropriate care.
SARA/EPCRA: Not subject to reporting.
RoHS: Does not contain prohibited substances.
Other National Regulations: No restrictions for typical use but phosphate discharge may require permits in wastewater applications. Regulations adapt based on regional environmental controls.
