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Product Name: O-Ethyl-S,S-Diphenyldithiophosphate
Other Names: EDDP, O-Ethyl-diphenyldithiophosphoric acid ester
Chemical Formula: C14H15O2PS2
Recommended Use: Used in industrial applications as a flotation agent, specialty chemical intermediate
Manufacturer/Supplier Details: Obtain directly from supplier documentation or call dedicated customer support lines for supply chain management
Emergency Telephone Number: Refer to the contact on packaging, use local poison control for 24-hour response
GHS Classification: Harmful if inhaled, Causes skin and serious eye irritation, Suspected of damaging fertility or the unborn child, May cause respiratory irritation
Signal Word: Warning
Hazard Statements: H302: Harmful if swallowed; H315: Causes skin irritation; H319: Causes serious eye irritation; H335: May cause respiratory irritation
Precautionary Statements: Avoid breathing dust or vapors, Use only in well-ventilated areas, Wear protective clothing and eye protection, Wash hands thoroughly after handling, Store locked up
Appearance and Odor: Pale yellow to brownish oily liquid with aromatic, sulfurous odor
Health Hazards: Prolonged exposure can affect liver and kidneys, Inhalation leads to throat and lung irritation, Skin contact triggers allergic response in some sensitive individuals
Environmental Hazards: Harmful to aquatic life, Avoid release to the environment
Chemical Identity: O-Ethyl-S,S-Diphenyldithiophosphate
CAS Number: 3338-24-7
Concentration: 97-100% as main component in technical grade material
Impurities/Additives: May contain trace levels of byproducts including diphenyl disulfide and ethyl alcohol from synthesis process
Synonyms: O-Ethyl S,S-diphenyl dithio phosphoric acid ester, Diphenyl dithiophosphate ethyl ester
Inhalation: Move affected person to fresh air, Loosen tight clothing, Seek medical attention if symptoms persist such as cough or shortness of breath
Skin Contact: Remove contaminated clothing and wash with soap and water, Seek medical advice if rash or irritation develops
Eye Contact: Rinse immediately with plenty of clean water for at least 15 minutes, Hold eyelids open, Get prompt medical advice
Ingestion: Rinse mouth with water, Do not induce vomiting, Get medical assistance immediately if nausea, drowsiness, or abdominal pain occur
Advice for Physicians: Symptomatic treatment, Monitor for respiratory symptoms and signs of sensitization or allergic response
Suitable Extinguishing Media: Use foam, dry powder, or carbon dioxide for small fires, Water spray for larger area but avoid direct jet
Unsuitable Media: High pressure water jets can spread the fire by splashing
Specific Hazards: May give off toxic fumes containing sulfur oxides and phosphorous oxides under thermal decomposition
Protective Equipment: Self-contained breathing apparatus and full protective gear during fire response
Firefighting Instructions: Approach upwind, Cool containers with water spray, Evacuate area if extensive smoke develops
Personal Precautions: Wear chemical-resistant gloves, goggles, full protective clothing and approved respirator, Avoid direct skin and eye contact
Environmental Precautions: Prevent entry into drains, sewers, or waterways, Contain spill with sand, earth, or suitable absorbent
Cleanup Methods: Collect spilled material with absorbent pads, shovel into labeled waste containers, Wash down area with plenty of water after removal
Disposal: Handle as hazardous waste, Follow local regulations for contaminated debris and liquid
Handling: Use only with adequate ventilation, Avoid breathing vapors or dusts, Wear appropriate PPE, Use non-sparking tools and explosion-proof equipment
Storage: Store in dry, cool, well-ventilated area away from incompatible substances such as oxidizers and strong acids, Keep tightly closed in original container
Special Precautions: Protect from direct sunlight and heat sources, Label storage to keep unauthorized personnel out
Incompatible Materials: Strong acids, oxidizing agents, alkali metals can trigger violent reactions or decomposition
Engineering Controls: Provide local exhaust or general ventilation to maintain airborne concentrations below recommended exposure limits
Personal Protective Equipment:
Physical State: Liquid
Color: Pale yellow to brownish
Odor: Aromatic, sulfurous
Melting Point: Not determined (decomposes on heating)
Boiling Point: Decomposes before boiling
Flash Point: 144°C (closed cup, literature value)
Vapor Pressure: Low at ambient temperatures
Solubility: Insoluble in water, soluble in organic solvents (chloroform, benzene)
Density: Approximately 1.17–1.22 g/cm3 at 20°C
pH: Not applicable (not appreciably soluble in water)
Chemical Stability: Stable in closed container at room temperature, Sensitive to moisture and oxidizing conditions
Reactivity: Reacts violently with strong acids or oxidizers, Contact with metal powders could cause slow decomposition and release of toxic gases
Hazardous Polymerization: Not expected under normal conditions
Decomposition Products: Sulfur dioxide, phosphorous oxides, aromatic hydrocarbons
Conditions to Avoid: Excessive heat, open flames, direct sunlight, and incompatible materials
Likely Exposure Routes: Inhalation, skin and eye contact, accidental ingestion
Acute Toxicity: Oral LD50 (rat): 210–400 mg/kg (moderately toxic), Dermal LD50 (rat): >2000 mg/kg (low acute skin toxicity)
Irritation: Causes moderate to severe eye and skin irritation, Inhalation of vapor or aerosol can irritate mucous membranes
Sensitization: Some individuals experience allergic contact dermatitis
Chronic Effects: Repeated exposure may damage liver and kidneys, Experimental studies suggest possible reproductive toxicity
Carcinogenicity: Not listed as carcinogen by IARC, OSHA, or NTP
Aquatic Toxicity: Highly toxic to aquatic organisms (LC50 for fish < 1 mg/L)
Persistence and Degradability: Limited data, expected to degrade slowly under environmental conditions, hydrolyzes under strong acidic or basic conditions
Bioaccumulation: Potential to bioaccumulate in aquatic organisms based on structure
Mobility: Low solubility in water, binds to sediments and soils
Other Adverse Effects: Avoid spillage to soil and water, Potential risk to local wildlife near chemical plants or disposal sites
Waste Treatment Methods: Dispose through approved chemical waste contractor, Incineration recommended for larger volumes
Packing for Disposal: Use sealed, labeled containers compatible with organosulfur compounds
Contaminated Materials: Wash and decontaminate tools and surfaces or dispose as hazardous waste
Precautions: Do not discharge effluent containing this product into lakes, streams, or public water
Regulatory Preference: Follow federal, state, and local regulations for disposal of organophosphorus and sulfur chemicals
UN Number: 3077
UN Proper Shipping Name: Environmentally Hazardous Substance, Liquid, n.o.s. (O-Ethyl-S,S-Diphenyldithiophosphate)
Transport Hazard Class: 9 (Miscellaneous Hazardous Material)
Packing Group: III
Marine Pollutant: Yes
DOT Shipping Regulations: Subject to regulation as hazardous material
Special Precautions: Secure upright during transit, Label containers clearly with hazard information
Emergency Response Guide Number: 171
TSCA Inventory: Appears on U.S. EPA TSCA Inventory
OSHA Hazard Classification: Hazardous Chemical as defined by the Hazard Communication Standard
EPCRA Section 313: Not listed as a Section 313 toxic chemical, Still requires reporting for accidental releases
REACH Status (EU): Registration may be required
Other Regulatory Details: Subject to local health and safety codes, Additional workplace exposure records may be required under chemical hygiene regulations
Labeling Requirements: Clearly display hazard symbols, signal words, hazard and precautionary statements
