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Chemical Name: Antimony Diisopropyldithiophosphate
Common Usage: Antiwear additive in lubricants, sometimes used for specialized industrial purposes
Form: Typically an oily liquid, yellow to amber, with a distinct chemical odor that lingers in the workspace
Molecular Formula: C6H15O2PS2Sb
CAS Number: 24573-78-4
Relevant Industries: Lubricant manufacturing, metalworking shops, equipment maintenance, and sometimes research labs seeking unique anti-seize properties
Primary Risks: Causes skin and eye irritation easily, inhalation of mist leads to respiratory tract problems
Long-Term Exposure: Increases worries over toxic effects connected to antimony compounds, which tend to accumulate in the body
Label Elements: Pictograms for harmful if swallowed or absorbed, exclamation mark for acute irritant effects
Chronic Hazards: Prolonged exposure links to liver and kidney issues as with other organometallic substances
Environmental Impact: Toxic towards aquatic organisms, even small spills upset aquatic ecosystems if not handled right away
Main Component: Antimony Diisopropyldithiophosphate, generally 90% or higher by weight
Other Constituents: Trace impurities from production, including phosphorous and sulfur byproducts, unreacted isopropanol sometimes present
Hazardous Impurities: No persistent bioaccumulative compounds reported at notable levels, but impurity profiles shift between batches
Eyes: Rinse right away with plenty of water, open eyelids to flush thoroughly, get medical help if irritation lingers after rinsing
Skin: Wash with soap and water as soon as you notice contact, remove contaminated clothing, repeated washing required if reddening develops
Inhalation: Move to fresh air immediately if symptoms show, loosen tight clothing, seek medical advice if shortness of breath or coughing does not fade
Ingestion: Do not try to induce vomiting, rinse mouth with water, call a doctor without delay if larger amounts were swallowed
Suitable Extinguishing Media: Use foam, carbon dioxide, or dry chemical extinguishers—water increases slip hazard and spreads the liquid
Hazardous Combustion Products: Phosphorous oxides, antimony oxides, sulfur oxides and irritating smoke complicate cleanup after a fire
Special Protective Actions: Firefighters should put on full protective gear and self-contained breathing apparatus because of toxic vapors
Specific Hazards Arising from the Chemical: Heated containers burst if pressure rises from decomposition gases, so cooling exposed drums with water spray makes a difference
Personal Precautions: Put on chemical-resistant gloves, safety goggles, and respirator if ventilation proves poor
Methods for Cleanup: Absorb spillage with sand or inert absorbent, sweep up without creating dust, shovel collected material into sealed chemical waste drums
Environmental Precautions: Avoid letting product reach drains, surface water, or soil—contain leaks with dikes or barriers right away
Decontamination: Clean the spill area with soapy water after removal to prevent long-term residue that could cause slips or skin contact
Safe Handling Practices: Always use chemical splash goggles and gloves, work in well-ventilated areas, keep bottles closed tightly when not in use
Storage: Keep in a cool, dry, ventilated spot, away from heat sources or open flames, segregate from oxidizers, acids, and food items
Incompatibilities: Mixing with strong acids, oxidizing agents, or alkalis produces heat and toxic byproducts
Bulk Storage: Use corrosion-resistant containers and secondary containment to prevent leaks contaminating storage rooms
Occupational Exposure Limits: No specific threshold limit value for this exact compound, but antimony compounds carry an ACGIH TLV of 0.5 mg/m3 (as Sb)
Engineering Controls: Fume hoods, local exhaust ventilation in mixing and pouring areas to keep vapor below limits
Personal Protective Equipment: Chemical gloves (nitrile or neoprene), splash-proof goggles, lab coats or chemical aprons, respirators for handling bulk or in poorly-ventilated rooms
Hygiene Measures: Wash up thoroughly after handling, keep food and drink away from work area, avoid cross-contamination by segregating work and rest zones
Appearance: Oily amber liquid, sometimes more yellow if fresher
Odor: Pungent, slightly rotten smell noticeable if open containers are left in the room
Boiling Point: Not precisely specified; likely above 200°C based on similar phosphorus compounds
Vapor Pressure: Low under normal temperature, but mist forms easily during agitation
Solubility: Insoluble in water, miscible with organic solvents like toluene or xylene
Density: Higher than water, sinks if poured onto aqueous solutions
Viscosity: Thicker than motor oil, pours slowly even in warm environments
Stability: Stable at room temperature if undisturbed, long shelf life if kept cool
Decomposition: Breaks down under strong heating, releasing toxic fumes of antimony and sulfur
Reactive Incompatibilities: Contact with strong oxidizing agents, acids, and alkalis triggers dangerous reactions
Polymerization: No hazardous polymerization expected unless exposed to intense energy or light
Routes of Exposure: Absorbs through skin, inhaled mists during agitation, accidental ingestion through poor hygiene
Immediate Effects: Burning irritation to skin and mucous membranes, nausea and dizziness if inhaled
Long-Term Effects: Long exposures impact liver, kidneys, lungs—antimony recognized for cumulative toxicity in industrial medicine
Carcinogenicity: Not listed as a carcinogen by major agencies for this specific compound, but antimony trioxide—its breakdown product—draws increased scrutiny
Symptoms of Overexposure: Metallic taste, headache, abdominal pain, skin rashes, and respiratory distress in poorly-ventilated sites
Aquatic Toxicity: Lethal to fish and aquatic invertebrates at low concentrations; even dilute runoff poisons water
Persistence and Degradability: Sticks around in sediments and surface soils, slow breakdown in nature
Bioaccumulation: Builds up in aquatic life over time, enters food chains near spill sites
Mobility in Soil: Moderate migration potential—tends to stay put if bound to soil particles
Impact on Sewage Systems: Upsets microbial balance, reduces effectiveness of biological wastewater treatment if present in high concentrations
Preferred Disposal Method: Send away as hazardous waste by licensed firms experienced with organometallics
Incineration: Only in approved chemical waste incinerators, air pollution controls needed for antimony and sulfur
Avoid: Never pour down the drain or toss in regular trash—immediate risk to people and environment
Contaminated Packaging: Rinse drums with solvent and send as hazardous waste, never reuse for food or non-chemical goods
UN Number: Not always assigned, falls under generic “toxic liquid, organic, n.o.s.” classification in many regions
Packing Group: Usually III (lowest hazard of regulated toxic materials), but subject to local interpretation
Transport Hazard Class: 6.1 (toxic substances)
Shipping Precautions: Use tight containers, secondary containment, keep upright, and transport with paperwork indicating “Toxic—antimony compound”
Workplace Safety: OSHA regulates antimony compounds as hazardous, so labelling and safety training required
Environmental: Harmful to aquatic environments triggers environmental regulations in the US under CWA and CEPA in Canada
Inventory Listings: Listed on several chemical inventories including US TSCA and EU REACH, limiting sales to registered handlers only
Special Restrictions: Some nations restrict use and import of antimony additives in lubricants due to toxicity and bioaccumulation issues
