© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Chemical Name: 2-Methylvaleraldehyde
Synonyms: 2-Methylpentanal
Molecular Formula: C6H12O
Molecular Weight: 100.16 g/mol
Appearance: Colorless liquid with a strong, pungent odor
Odor: Sharp, irritating
Chemical family: Aliphatic aldehyde
Uses: Intermediate for fragrances, flavors, and organic synthesis
CAS Number: 123-15-9
GHS Classification: Flammable liquid, Acute toxicity (oral, inhalation, dermal), Skin and eye irritation
Hazard Statements: Highly flammable liquid and vapor; harmful if swallowed, inhaled, or absorbed through the skin; causes skin and eye irritation
Pictograms: Flame, Exclamation mark
Routes of Exposure: Eyes, skin, inhalation, ingestion
Major Risks: Breathing in vapor leads to coughing and headaches, skin contact results in itching and redness, accidental ingestion has caused stomach pain and nausea, exposure to liquid or vapor brings on lasting discomfort
Component: 2-Methylvaleraldehyde
Percentage: More than 95% by weight
Impurities: Trace organic acids and related aldehydes, based on production batch
Inhalation: Move outside into fresh air as soon as breathing trouble starts, loosen clothing
Skin Contact: Rinse with running water for at least 15 minutes, take off any contaminated clothes
Eye Contact: Flush eyes deeply with water for at least 15 minutes, blink often and look for redness or blurring
Ingestion: Do not try to vomit, drink water only if the person is clear-headed and alert
Medical Attention: Get medical help for any lasting pain or breathing trouble, stay away from further exposure
Suitable Extinguishing Media: Carbon dioxide, dry chemical powders, foam
Fire Hazards: Vapors form explosive mixtures with air, flash point near 31°C (88°F)
Fire-Fighting Tactics: Cool closed containers exposed to fire using water spray, avoid inhaling combustion products
Protective Equipment: Firefighters use full protective clothing with self-contained breathing apparatus
Combustion Products: Burning gives carbon monoxide, carbon dioxide, irritating smoke
Spill Cleanup: Evacuate area, stop leaks if possible, soak up with inert material like sand
Ventilation: Use fans or open windows for airflow, reduce vapor buildup
Protective Gear: Gloves, chemical splash goggles, respirator as needed
Environmental Precautions: Keep away from drains, sewers, avoid runoff into waterways
Waste Disposal: Collect spillage in closed containers for proper removal
Handling: Keep containers tightly sealed, avoid breathing vapor, wash hands after handling
Storage: Store away from heat, flames, or sparks, use in well-ventilated places
Incompatible Materials: Strong oxidizers, acids, and reducing agents
Special Notes: Static discharge risk means grounding containers during transfer
Engineering Controls: Local exhaust ventilation, chemical fume hoods
Personal Protective Equipment: Chemical-resistant gloves, splash-proof safety goggles, flame-resistant lab coat
Respiratory Protection: Organic vapor cartridge respirator during high vapor risk
Hygiene Practices: Wash hands and exposed skin after use, change contaminated clothing
Exposure Limits: No OSHA or ACGIH limits set specifically, keep exposure as low as possible based on similar compounds
State: Liquid
Color: Colorless
Odor: Strong, pungent, irritating
Boiling Point: 127-130°C
Melting Point: -54°C
Vapor Pressure: Roughly 4 mmHg at 20°C
Flash Point: About 31°C
Solubility: Slightly soluble in water, high solubility in organic solvents
Density: 0.81 g/mL at 20°C
Viscosity: Low
Partition Coefficient: Estimated log Kow about 1.5-2
Chemical Stability: Stable under ordinary conditions, breaks down in strong light or heat
Reactivity: Reacts with strong acids, oxidizers, reducing agents; polymerizes under certain conditions
Hazardous Decomposition: Can give off carbon oxides and irritating fumes during heating or burning
Other Concerns: Exothermic reactions possible with alkalis or concentrated acids
Acute Toxicity: Harmful if swallowed, inhaled, or absorbed; animal studies on similar aldehydes describe central nervous system depression, respiratory irritation, moderate oral and dermal toxicity
Chronic Effects: Repeat skin contact dries, cracks, and causes dermatitis, chronic inhalation plays with respiratory health
Skin/Eye Effects: Irritation, burning, redness
Sensitization: No strong reports of allergic skin reaction, remains possible among sensitive people
Carcinogenicity: No data links it with cancer in humans or animals
Other Risks: Exposure in combination with alcohol consumption sometimes increases toxicity of aliphatic aldehydes
Aquatic Toxicity: Some risk for small aquatic life, kills fish and invertebrates in concentrated spills
Persistence: Breaks down quickly in air and water, not expected to bioaccumulate
Mobility: Flows through soil quickly if spilled, contaminates surface water
Degradability: Microbes and sunlight degrade it under natural outdoor conditions
Waste Handling: Dispose as hazardous chemical waste in line with local laws
Chemical Disposal: Incineration at approved sites, avoid landfill unless treated to neutralize risks
Container Disposal: Triple rinse containers, puncture before discarding so they cannot be reused
Pre-treatment: Dilution and neutralization may be needed before final disposal, check with hazardous waste advisors
Hazard Class: Flammable liquid (Class 3)
UN Number: Classified under flammable organic chemicals
Packing Group: II (medium danger)
Proper Shipping Name: 2-Methylvaleraldehyde or “Aldehyde, flammable, n.o.s.”
Transport Requirements: Use sealed drums or approved containers, keep away from heat sources, label clearly for transport
EU Classification: “Harmful,” “Irritant,” “Flammable”—listed under REACH as a concern
Waste Status: Hazardous under waste codes for organic chemicals
Right to Know: Listed in European, North American, and East Asian chemical inventories
Workplace Standards: Labelling, safety data sheets, and training required in most regulated workplaces
