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Substance: Methyl tetracosanoate
Chemical Formula: C25H50O2
Synonyms: Methyl lignocerate
Common Use Cases: Found in specialty surfactants, niche cosmetic additives, and certain laboratory research applications.
Appearance: White to off-white waxy solid, often available in pellets or powder form at room temperature.
GHS Classification: Not acutely toxic or hazardous by inhalation, ingestion, or skin contact under normal handling conditions
Physical Hazards: Low likelihood of dust explosion; caution applies if in powder form and conditions support airborne dust.
Health Hazards: Mild irritant potential for eyes and skin from long or repeated exposure.
Environmental Hazards: Material presents low acute aquatic toxicity.
Precautionary Statements: Good laboratory hygiene helps minimize risk of transfer to skin or eyes; using gloves and goggles in a lab context remains sound practice.
Main Ingredient: Methyl tetracosanoate, typically at concentrations greater than 95 percent in technical grade samples.
Impurity Profile: Small fractions of unsaturated methyl esters or shorter/longer chain esters may occur due to sourcing from natural fats or waxes.
Eye Contact: Rinse gently with water, avoid rubbing, reach for medical attention if irritation lingers.
Skin Contact: Wash affected area with soap and water; persistent redness or rash justifies a healthcare check.
Inhalation: Rarely an issue due to low volatility, but in case of accidental inhalation of dust, move to fresh air.
Ingestion: Unlikely to be toxic at routine levels; rinse mouth, do not induce vomiting, and consult a physician to be prudent.
Suitable Media: Standard foam, dry powder, carbon dioxide extinguishers can stop small fires involving this ester.
Products of Combustion: Burning produces carbon oxides—adequate ventilation or SCBA (self-contained breathing apparatus) recommended for response.
Advice for Firefighters: Fire gear with eye protection and gloves helps, especially since molten product can splatter at high temperatures.
Special Hazards: Thermal decomposition releases dense smoke and possible hydrocarbons, so evacuation of enclosed spaces makes sense.
Personal Precautions: Avoid dust generation by sweeping gently or using a vacuum with a HEPA filter; slip hazard may arise if material is spilled in melted form.
Environmental Measures: Prevent entry of large quantities into drains or water systems.
Clean-up Methods: Scoop up solid, wipe any residue with inert absorbent material, and dispose in line with local rules for non-hazardous organics.
Handling: Store in tightly sealed containers, avoid open flames or excessive heat sources; keep work area ventilated when handling powders.
Hygiene: Wash hands before eating or drinking, change gloves regularly in an industrial or lab setting.
Storage: A cool, dry space out of direct sunlight limits degradation over time; do not store with strong oxidizers.
Occupational Exposure Limits: Not established for this compound, but general nuisance dust limits (10 mg/m³ for particulates) should guide good practices.
Protective Equipment: Safety glasses, lab coat, and nitrile gloves set the standard for lab work; industrial users should reach for respiratory protection if dust becomes an issue.
Engineering Controls: Basic ventilation often suffices, but enclosures for dust-producing operations cut airborne concentrations dramatically; local exhaust helps when scaling up.
Physical State: Solid at room temperature, melts around 50-55°C
Odor: Faint, waxy, resembles natural fatty materials
Solubility: Insoluble in water, soluble in warm organic solvents like ethanol and chloroform
Boiling Point: Decomposes before reaching a distinct boiling phase
Vapor Pressure: Negligible; vapor formation highly unlikely in normal use
Density: Roughly 0.85-0.88 g/cm³ at 40°C
pH: Not applicable as a non-aqueous solid
Thermal Stability: Stable under room temperature and typical handling conditions
Incompatibility: Reactive with strong oxidizing agents, risk rises if exposed to concentrated acids or alkalis at high temperatures
Hazardous Decomposition: Breaks down to carbon monoxide, carbon dioxide, and hydrocarbons on combustion or extreme heating
Polymerization: Not known to occur under normal or foreseeable storage conditions
Acute Toxicity: Studies in rodents show very low oral and dermal toxicity; high doses would be required before impacts might appear.
Skin and Eye Irritation: Minor irritation possible if left on skin or in eyes for extended periods; rinsing remains effective.
Sensitization: Reports of allergic reactions remain unconfirmed for this compound.
Long-Term Effects: No data linking Methyl tetracosanoate to chronic illness when used responsibly in laboratory and consumer contexts.
Aquatic Toxicity: No evidence pointing to acute harms to fish or aquatic invertebrates at likely exposure levels; breakdown expected to follow patterns seen in fatty acid methyl esters.
Biodegradation: Functional groups and long-chain structure suggest it eventually breaks down via soil microbes.
Bioaccumulation: Unlikely to build up in aquatic organisms given its low aqueous solubility and ready breakdown.
Waste Handling: Small lab quantities or consumer leftovers fit into regular non-hazardous organic waste guidelines; burning with energy recovery forms the least complicated route in industrial settings.
Local Regulations: Always a good idea to consult waste management authorities; avoid bulk dumping in aquatic environments as a precaution over hypothetical long-term buildup.
UN Number: Not assigned, since it's not classified as hazardous for road, rail, or air transport.
Packaging Considerations: Leakproof containers stop messes in transit; firm packaging helps, since wax-based solids deform if stacked or heated.
Transport Hazards: No notable risks from standard movement or handling under regulated conditions.
Classification: Not considered hazardous under typical chemical safety legislation in many regions, including the EU CLP Regulation and US OSHA HCS.
Inventory Status: Largely listed with no special restrictions on most chemical inventories reflecting its benign profile.
Labelling: Responsible handling labels support safety, but regulatory agencies do not require hazard symbols or pictograms for this compound under current guidelines.
