Product Name: Monophenyldioctyl Phosphite
Chemical Formula: C22H39O3P
Other Names: Phenyl Dioctyl Phosphite
CAS Number: 1809-19-8
Recommended Use: Used as an antioxidant and stabilizer in organic synthesis and plastics processing
Manufacturer Contact Information: Address, phone, emergency telephone, and e-mail contact available
Product Code: Unique company-assigned number visible on packaging
Emergency Telephone: National response center number for chemical emergencies provided
Classification: Eye irritation category 2A, Skin irritation category 2, Acute oral toxicity category 4
Signal Word: Warning
Hazard Statements: Causes skin and serious eye irritation. May be harmful swallowed, inhaled, or in contact with skin. May cause respiratory irritation following exposure to high concentrations.
Pictograms: Exclamation mark for warning
Precautionary Statements: Avoid breathing mist or vapors. Wash thoroughly after handling. Use protective gloves, clothing, eye and face protection. Seek medical attention if feeling unwell or after contact with eyes/skin.
Other Hazards: No known long-term ecological bioaccumulation effects reported in standard data.
Chemical Name: Monophenyldioctyl Phosphite
Concentration: ≥95% by weight
Impurities: Trace amounts of trialkyl phosphites, phenol, octanol (below 1%)
CAS Number: 1809-19-8
EC Number: 217-305-4
Molecular Weight: Approximately 382.52 g/mol
Inhalation: Move affected person to fresh air. Seek medical attention if breathing is difficult. Remove any constrictive clothing.
Skin Contact: Wash thoroughly with water and mild soap. Remove contaminated clothing and shoes. Seek medical advice if irritation persists.
Eye Contact: Flush eyes with a gentle stream of clean water for at least 15 minutes. Lift upper and lower eyelids periodically. In case of persistent pain or redness, seek immediate medical help.
Ingestion: Rinse mouth. Do not induce vomiting unless instructed by a medical professional. Drink plenty of water. Seek medical attention, especially if symptoms develop.
Note to Physician: Symptomatic treatment advised. Monitor for gastrointestinal discomfort or respiratory symptoms.
Suitable Extinguishing Media: Dry chemical, carbon dioxide, foam, water spray for large fires
Specific Hazards: Decomposition releases toxic gases such as phosphorus oxides and carbon monoxide
Protective Equipment: Firefighters require self-contained breathing apparatus and full turnout equipment
Special Precautions: Move surrounding material from area if safe. Cool containers with water to prevent pressure build-up.
Hazardous Combustion Products: Phosphoric acid fumes, COx, potentially phenolic compounds under combustion
Explosion Hazard: Material does not create an explosion risk under standard storage conditions. Avoid intense heat or ignition sources.
Personal Precautions: Use gloves, protective goggles, and suitable clothing. Ventilate area. Avoid breathing vapors.
Spill Cleanup Methods: Prohibit unprotected persons from entering spill zone. Absorb spill with inert, non-combustible material like vermiculite or sand. Collect absorbed material in containers for proper disposal.
Environmental Precautions: Do not release into drains, surface water, or soil. Notify authorities if this occurs.
Decontamination: Clean contaminated area with detergent and substantial amounts of water. Prevent runoff.
Waste Disposal: Dispose through licensed hazardous waste contractor, following local and federal regulatory requirements.
Handling Requirements: Always use in ventilated areas. Wear suitable personal protective equipment. Avoid breathing vapors or contact with skin and eyes.
Advice on Safe Handling: Wash hands and exposed skin after working with the material. Do not eat, drink, or smoke during handling.
Storage Conditions: Store tightly sealed in a cool, dry, well-ventilated area, away from direct sunlight and incompatible substances such as acids and oxidizing agents.
Specific End Use: Reserved for industrial or laboratory use, only by trained professionals familiar with chemical safety.
Container Recommendations: Use original packaging or chemically compatible alternative. Clearly label storage vessel.
Exposure Limits: No official occupational exposure limits established by OSHA, ACGIH, or EU; keep exposures as low as possible using controls.
Engineering Controls: Use mechanical exhaust ventilation and avoid vapor buildup. Employ local fume extraction near handling points.
Personal Protective Equipment: Nitrile or neoprene gloves; chemical splash goggles; lab coat or overall; chemical-resistant shoes; respiratory protection when aerosols or mists occur.
Workplace Hygiene: Remove contaminated clothing immediately. Practice regular hand washing, avoid hand-to-mouth contact. Do not eat or smoke in work area.
Environmental Protection: Implement spill containment systems and prevent product reaching drains.
Appearance: Colorless to pale yellow liquid
Odor: Faint, characteristic
Odor Threshold: Not established
pH: Non-aqueous material; pH not applicable
Melting Point/Freezing Point: Below -50°C
Boiling Point: 200-230°C at atmospheric pressure
Flash Point: Above 170°C (closed cup)
Evaporation Rate: Slow, much less than water
Flammability: Not classified as flammable
Vapor Pressure: Below 0.1 mmHg at 25°C
Partition Coefficient (n-octanol/water): log Kow ~ 5
Solubility: Virtually insoluble in water; soluble in common organic solvents
Auto-ignition Temperature: Above 260°C
Viscosity: 20-40 mPa·s at 25°C
Density: 0.95-0.97 g/cm³ (25°C)
Chemical Stability: Product remains stable under standard use and storage conditions. Time, elevated heat, ultraviolet light, and air exposure increase degradation risk.
Incompatible Materials: Strong acids, oxidizing agents, peroxides, strong bases. Contact may cause hazardous reactions or decomposition.
Decomposition Products: At high temperatures or in fire, forms carbon monoxide, carbon dioxide, phosphorus oxides, and possibly phenol and octanol residues.
Polymerization: No hazardous polymerization expected.
Conditions to Avoid: Extended exposure to heat, sunlight, open flame, and humid air accelerate chemical breakdown.
Acute Toxicity: Oral LD50 (rat) estimated at 1,000-2,000 mg/kg. Moderately toxic on acute exposure.
Skin Corrosion/Irritation: Causes irritation, redness, and possible dermatitis after repeated contact.
Eye Damage/Irritation: Irritating, leading to tearing, redness, and discomfort.
Respiratory Sensitization: Prolonged inhalation may trigger coughing, throat discomfort, or mild respiratory tract irritation.
Other Effects: No long-term carcinogenicity, mutagenicity, or reproductive hazard data available. Chronic exposure may potentiate skin sensitivity.
Symptoms of Exposure: Redness, burning, abdominal pain, nausea, drowsiness in severe oral exposure cases.
Toxicity: Aquatic toxicity is low to moderate for invertebrates and fish; short-term LC50 (fish, 96h) above 10 mg/L.
Persistence and Degradability: Slowly degrades in natural environment, hydrolyzes with time in contact with water.
Bioaccumulative Potential: High partition coefficient suggests potential for bioaccumulation in aquatic organisms.
Mobility in Soil: Low mobility due to low water solubility; binds to sediment and particulate matter.
Other Adverse Effects: No significant impact reported for birds, plants, or mammals in limited ecological studies. Release into environment should remain controlled.
Waste Treatment Methods: Incinerate under controlled conditions at licensed hazardous waste facility. Use chemical oxidation or neutralization as recommended by a qualified waste contractor.
Disposal of Contaminated Packaging: Wash empty containers with detergent and water before recycling or disposal. Destroy under authority of local environmental guidelines.
Regulatory Requirements: Follow federal, local, and state rules for hazardous organic chemical disposal. Do not reuse packaging.
Special Precautions: Do not allow product to reach surface water, soil, or sanitary sewers. Avoid bulk landfill.
UN Number: Not regulated for ground, air, or sea under most current UN criteria. Status may change if above threshold volumes or national transport rules state otherwise.
Proper Shipping Name: Monophenyldioctyl Phosphite (or generic “Organophosphorus Compound” as per some transport codes)
Hazard Class: Not regulated as ‘dangerous goods’ class under current rules
Packing Group: Not applicable
Environmental Hazards: Not rated marine pollutant by IMDG
Special Precautions in Transport: Prevent leaks, do not stack above recommended height, ensure closures remain secure during movement. Notify carrier of chemical characteristics.
US Regulations: Subject to TSCA (Toxic Substances Control Act). Not listed under CERCLA. SARA Title III, Section 311/312: Acute health hazard.
EU Regulations: Candidate for REACH registration; controlled as an industrial chemical under CLP Regulation (EC 1272/2008). Not SVHC as of last update.
Canadian Regulations: DSL/NDSL-listing. WHMIS classification—may require labeling as hazardous.
Other International Laws: Must be tracked for workplace safety across China, Japan, Australia, and Brazil according to relevant national laws for industrial chemicals.
Labeling Requirements: Product labeling to show hazards, safety precautions, and emergency contacts under GHS guidelines.
