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Product Name: Antioxidant XH-245
Chemical Name: 2,2'-Methylenebis(6-tert-butyl-4-methylphenol)
Synonyms: XH-245, MBM-BHT
CAS Number: 36443-68-2
Recommended Use: Used as an antioxidant in the plastics and rubber industry, especially to stabilize polypropylene, polyethylene, and rubbers.
Manufacturer Information: Contact details for the company manufacturing or supplying the product, including address, phone number, and emergency contact.
Physical State: Solid (powder or granules)
GHS Classification: Not classified as hazardous by GHS criteria
Hazard Statements: May cause irritation to eyes and skin. Inhalation of dust may cause respiratory irritation. Not considered flammable but may support combustion at high temperatures.
Pictograms: None required under GHS
Precautionary Statements: Avoid generating dust. Wash hands thoroughly after handling. Use appropriate protective equipment when handling large quantities.
Chemical Name: 2,2'-Methylenebis(6-tert-butyl-4-methylphenol)
CAS Number: 36443-68-2
Concentration: 98-100%
Impurities: Typically less than 2%, mostly related to manufacturing by-products or residual solvents.
Other Components: No additives or stabilizers commonly included.
Inhalation: Move person to fresh air. If symptoms such as coughing or shortness of breath develop, seek medical attention.
Skin Contact: Remove contaminated clothing and wash skin thoroughly with soap and water. If irritation persists, contact a physician.
Eye Contact: Rinse eyes cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. Seek medical attention if irritation continues.
Ingestion: Rinse mouth. Do not induce vomiting unless directed by medical personnel. Seek medical advice if large amount swallowed or if symptoms appear.
Suitable Extinguishing Media: Use dry chemical, foam, carbon dioxide, or water spray.
Unsuitable Media: Avoid using direct water stream on burning material as it may scatter material and cause spread.
Specific Hazards: Combustion may release hazardous gases such as carbon monoxide, carbon dioxide, and other unknown organics.
Protective Equipment for Firefighters: Wear self-contained breathing apparatus and full protective gear.
Recommended Actions: Cool containers exposed to fire with water spray to prevent explosion. Remove product from fire area if safe to do so.
Personal Precautions: Wear protective gloves, goggles, and mask to avoid dust inhalation and contact.
Environmental Precautions: Prevent runoff to soil, waterways, or drains. Clean up spills promptly to minimize environmental impact.
Cleanup Methods: Sweep or scoop up material and place in suitable container for disposal. Use vacuum system with HEPA filter for small spills to avoid dust generation.
Additional Advice: Avoid creating dust clouds and ensure adequate ventilation in affected area.
Safe Handling Recommendations: Avoid contact with eyes, skin, and clothing. Use only in well-ventilated areas. Prevent dust formation. Do not eat, drink, or smoke during use.
Storage Conditions: Store in tightly closed containers in a cool, dry, well-ventilated area away from heat, sparks, and incompatible materials. Keep away from food, drink, and animal feed.
Incompatibilities: Strong acids and oxidizing agents. Do not store with highly reactive chemicals.
Specific Requirements: Store off the ground and out of direct sunlight. Protect container from physical damage.
Occupational Exposure Limits: No established exposure limits for Antioxidant XH-245, but minimize exposure to dust.
Engineering Controls: Use local exhaust ventilation or other engineering controls to keep airborne levels below recommended exposure limits.
Personal Protective Equipment (PPE): Safety glasses or goggles; chemical-resistant gloves (nitrile or similar); dust mask or respirator in case of dust generation.
General Hygiene Measures: Wash thoroughly after handling, change contaminated clothing, and avoid inhaling dust or ingesting product.
Environmental Controls: Prevent product from entering drains, sewers, or watercourses.
Appearance: White to off-white powder or granules
Odor: Slightly phenolic, mild odor
Odor Threshold: Not available
pH: Not applicable
Melting Point: 108-112 °C
Boiling Point: Not determined (decomposes)
Flash Point: >200 °C (Closed cup)
Flammability: Not highly flammable, but combustible at high temperatures
Solubility: Insoluble in water, soluble in most organic solvents
Vapor Pressure: Negligible at room temperature
Density: Approx. 1.04 g/cm³ at 20 °C
Partition Coefficient (log Kow): >6 (highly lipophilic)
Auto-ignition Temperature: Not available
Decomposition Temperature: >250 °C
Chemical Stability: Stable under recommended storage and handling conditions.
Conditions to Avoid: Direct sunlight, excessive heat, strong oxidizers, and acids.
Incompatible Materials: Strong acids, strong bases, oxidizing agents.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, and other potentially toxic fumes.
Possibility of Hazardous Reactions: Does not react dangerously under normal conditions. Avoid contact with incompatible materials to prevent hazardous situations.
Acute Toxicity: Low oral and dermal toxicity. No data indicating significant acute hazard.
Skin Irritation: May cause mild irritation in sensitive individuals.
Eye Irritation: Can cause irritation, especially if in direct contact.
Respiratory Sensitization: Inhalation of dust can cause irritation to respiratory tract.
Chronic Effects: No evidence of carcinogenicity, mutagenicity, or reproductive toxicity found in available studies.
Additional Toxicological Data: Not classified as hazardous according to current EU and US criteria. Prolonged repeated exposure at high doses may have effects that require further research.
Eco-toxicity: Low toxicity to aquatic organisms based on available studies. High Log Kow predicts potential for bioaccumulation, so long-term environmental exposure should be limited.
Persistence and Degradability: Not readily biodegradable under typical environmental conditions.
Bioaccumulative Potential: Likely to bioaccumulate in aquatic organisms due to lipophilicity.
Mobility in Soil: Expected to adsorb to soil particles and sediments.
Other Hazardous Effects: Not registered as environmentally hazardous but minimizing release prevents long-term buildup in natural habitats.
Waste Disposal Methods: Collect and place into suitable containers for disposal at an authorized landfill site or incineration facility. Dispose of in accordance with local, regional, and national regulations.
Uncleaned Packaging: Contaminated packaging should be treated as product waste. If clean and empty, packaging may be recycled where appropriate.
Precautions: Avoid release into the environment. Do not dump into drains, surface water, or soil.
UN Number: Not regulated as a dangerous good according to UN, IMDG, IATA
Proper Shipping Name: Not classified as hazardous for transport
Hazard Class: Not assigned
Packing Group: Not applicable
Transport Hazard Label: None required
Special Precautions: Handle containers carefully and avoid spillage.
Other Transport Requirements: Protect from moisture and physical damage during transit.
Safety, Health and Environmental Regulations: Antioxidant XH-245 not listed under major hazardous chemical regulations such as REACH, TSCA, OSHA hazardous chemicals.
Inventory Status: Listed on TSCA (United States), EINECS (Europe), and most major chemical inventories.
Labeling Requirements: No special hazard labeling required.
Other Regulations: Users should verify compliance with all applicable regional, national, and local regulations.
