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Name: trans-2-Dodecenal
Chemical Formula: C12H22O
Common Uses: Flavoring agent, fragrance component, experimental research
Appearance: Clear to pale yellow liquid
Odor: Slight, soapy; sometimes compared to citrus or coriander
Chemical Family: Unsaturated aliphatic aldehyde
CAS Number: 18829-55-5
GHS Classification: Causes skin irritation, may cause allergic skin reaction, causes eye irritation
Signal Word: Warning
Hazard Statements: Irritating to skin and eyes, potentially harmful if swallowed or inhaled
Pictograms: Exclamation mark (for irritant effects)
Risk of Fire: Flammable liquid and vapor
Component: trans-2-Dodecenal
Concentration: Typically above 95% in industrial and lab samples
Impurities: Minor traces of related aldehydes or alkanes possible after synthesis
Inhalation: Move to fresh air and seek medical help if breathing becomes difficult
Skin Contact: Remove soiled clothing, wash skin with soap and water for several minutes
Eye Contact: Rinse slowly with water, lifting eyelids for at least 15 minutes, get medical attention for persistent symptoms
Ingestion: Do not induce vomiting, rinse mouth and get medical help if significant quantity consumed
General Note: Immediate first aid can prevent lasting injury from chemical burns or allergic reactions, especially for users with skin sensitivities or respiratory conditions
Suitable Extinguishing Media: Carbon dioxide, foam, dry chemical powder
Unsuitable Methods: Water spray may spread burning liquid
Fire Hazards: Vapors may form flammable mixtures with air, liquid can ignite at moderate temperatures
Personal Protective Equipment: Use self-contained breathing apparatus and full protective gear
Special Information: Fire can release toxic fumes including carbon monoxide and aldehydes; commercial quantities stored in poorly ventilated areas raise ignition risk
Personal Protection: Avoid skin and eye contact, stay upwind, secure proper ventilation
Environmental Precautions: Prevent spillage from reaching drains, penetrate soil, or contaminate surface water
Spill Cleanup: Absorb with sand or inert material, collect in sealable container for disposal
Decontamination: Clean contaminated surface thoroughly using water and detergent to avoid lingering residue and odor
Handling: Wear protective gloves and goggles, work in well-ventilated space, avoid breathing vapors or mist
Storage: Store in tightly sealed amber glass containers, keep away from heat sources and ignition points
Segregation: Separate from strong acids, bases, and oxidizing agents
Housekeeping: Wipe spills promptly, label storage containers clearly
Engineering Controls: Use chemical fume hood or local exhaust ventilation
Personal Protective Equipment: Chemical-resistant gloves (nitrile or butyl rubber), safety goggles, lab coat
Respiratory Protection: Use NIOSH-approved respirator if airborne concentrations climb
Hygiene Measures: Wash hands thoroughly after handling, remove contaminated clothing at end of shift
Exposure Limits: No established occupational exposure limits, but minimizing chronic or repeated exposure lowers sensitization risk
Form: Liquid
Color: Colorless to pale yellow
Boiling Point: Approx 130–150°C at 20 mmHg (lower pressure reduces boiling requirement)
Melting Point: Not well documented; usually liquid at room temperature
Flash Point: Near 96°C (close vials to avoid vapor buildup)
Solubility: Insoluble in water, soluble in organics like ethanol, ether
Odor Threshold: Noticeable at low part-per-million concentrations; strong presence even at trace amounts
Stability: Stable under standard temperatures if shielded from air, moisture, and excessive light
Reactivity: Can react vigorously with strong oxidizers and bases, may polymerize slowly in open air due to aldehyde group
Incompatible Materials: Avoid mixing with concentrated acids, bases, or strong oxidizers
Hazardous Decomposition: Burning yields carbon oxides and toxic irritants
Polymerization: Unlikely but possible with improper storage
Acute Effects: Causes irritation to skin and eyes, may provoke respiratory discomfort if inhaled
Sensitization: Some users develop allergic reactions after repeated exposure
Oral Toxicity: Animal studies suggest low-to-moderate acute toxicity, data for humans tie repeated ingestion to digestive and mucous irritation
Chronic Exposure: No solid long-term health effect studies exist, but persistent contact may cause dermatitis or worsen asthma
Special Risk Groups: Sensitive individuals, especially those with a history of chemical allergies, fare worse with contact
Aquatic Toxicity: Harmful to aquatic organisms at high concentrations; spills near water sources may kill fish or invertebrates
Persistence: Degrades slowly in soil and water, persist longer under low-oxygen conditions
Bioaccumulation: Unlikely in higher organisms due to metabolic breakdown; no significant magnification in food chains detected
Wastewater Impact: Contributes to chemical oxygen demand in municipal treatment; flavor and odor persist if not thoroughly removed
Recommended Disposal: Incinerate with proper gas scrubbing if industrial quantities present, smaller amounts handled as hazardous chemical waste
Container Cleaning: Rinse with solvent, dispose rinseate as chemical waste
Environmental Protection: Avoid pouring into drains or releasing untreated into the environment
UN Classification: Regulated as flammable liquid, specific codes based on local or international guidelines
Packing Group: Medium hazard varies by transport quantity and concentration
Labeling: Clearly mark exterior packaging with flammable and irritant warnings
Storage During Transport: Secure upright containers, cushion against breakage, keep away from food or feed stocks
OSHA Status: Regulated primarily for safe handling under the general duty clause
EPA Status: Not explicitly listed as hazardous, but subject to standard clean air and water controls
TSCA Inventory: Present on the United States Toxic Substances Control Act inventory
International Rules: Restrictions may apply in flavoring or fragrance applications in some countries, especially for consumer contact
Labelling: Product labels stress flammability, respiratory, and skin hazards, reflecting best practice and regulatory guidance
