© 2026 Sinochem Nanjing Corporation,
All Right Reserved
Product Name: N-Butyraldehyde
Chemical Formula: C4H8O
Synonyms: Butanal, 1-Butanal, Butyraldehyde
CAS Number: 123-72-8
Recommended Use: Organic synthesis, chemical intermediate, flavoring agent
Manufacturer: Contact manufacturer’s safety office or customer service
Emergency Contact: Refer to local or national poison centers or emergency response
Address: Refer to packaging or provided safety documents for exact address details
Hazard Classification: Flammable liquid (Category 3), Acute toxicity (Category 4, oral and dermal), Skin irritation (Category 2), Eye irritation (Category 2A), Specific target organ toxicity - single exposure (Category 3)
Label Elements: Flammable, Harmful if swallowed/inhaled, Causes serious eye irritation, May cause drowsiness or dizziness
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor, Causes skin and eye irritation, Harmful if inhaled, May cause respiratory tract irritation, May cause central nervous system effects such as headache or dizziness
Precautionary Statements: Keep away from heat, sparks, open flames; use explosion-proof equipment; avoid breathing vapors; wash skin after handling; wear protective gloves, protective clothing, and eye/face protection; use only outdoors or in well-ventilated areas
Chemical Name: N-Butyraldehyde
Concentration: Approximately 98–100%
Impurities: Water (<1%), possible traces of acetic acid or higher aldehydes depending on supplier
EC Number: 204-646-6
Inhalation: Remove to fresh air, keep at rest, monitor for respiratory distress, seek medical advice if symptoms persist
Skin Contact: Wash thoroughly with soap and plenty of water, remove contaminated clothing, seek medical attention for persistent irritation
Eye Contact: Rinse cautiously with water for at least 15 minutes, remove contact lenses if present and easy to do, continue rinsing, seek medical attention
Ingestion: Rinse mouth, obtain immediate medical attention, do not induce vomiting unless directed by medical personnel
Symptoms of Exposure: Irritation to mucous membranes, headache, dizziness, nausea, respiratory tract discomfort; larger exposures may cause unconsciousness
Suitable Extinguishing Media: Alcohol-resistant foam, dry chemical powder, carbon dioxide, water mist
Unsuitable Extinguishing Media: Full water jet can spread fire
Specific Hazards: Vapors may form explosive mixtures with air, combustion produces carbon monoxide, carbon dioxide, other toxic vapors
Protective Equipment for Firefighters: Wear full protective clothing, self-contained breathing apparatus
Firefighting Instructions: Cool fire-exposed containers with water spray, prevent runoff from entering drains or water sources
Personal Precautions: Evacuate unnecessary personnel, ventilate area, avoid inhalation and skin contact, use personal protective equipment
Environmental Precautions: Prevent spillage from entering waterways or drains, contain with sand or inert absorbent
Clean-up Methods: Absorb with non-combustible material, collect in airtight containers, dispose according to regulations, thoroughly ventilate effected area and wash with water after clean-up
Safe Handling: Transfer in closed systems, ground/bond containers for transfer, avoid inhalation of vapors, avoid open flames, static discharge, and sources of ignition
Safe Storage: Store in cool, well-ventilated place, keep containers tightly closed, store in flammable liquid storage areas, avoid storing with oxidizers, acids, or bases
Incompatible Materials: Strong oxidizing agents, acids, alkalis, amines; forms unstable peroxides with air contact
Special Requirements: Use explosion-proof electrical systems, avoid contact with air for long storage periods, regularly check for signs of decomposition or leakage
Exposure Limits: OSHA PEL – 50 ppm (150 mg/m³) TWA (as recommended)
Engineering Controls: Use local exhaust and general ventilation systems, fume hoods for laboratory-scale work
Personal Protective Equipment: Chemical-resistant gloves (nitrile, neoprene), safety goggles, face shield for splash protection, flame-resistant lab coats or aprons
Respiratory Protection: Use approved respirators for high vapor concentrations or poorly ventilated spaces
Hygiene Measures: Wash hands before breaks and after work, avoid contaminated clothing, keep work clothing separate from other laundry
Appearance: Clear, colorless to slightly yellow liquid
Odor: Strong, pungent, characteristic fruity odor
Odor Threshold: Around 0.05 ppm
pH: Not applicable (neutral in water)
Melting Point/Freezing Point: -96°C
Boiling Point: 75–76°C
Flash Point: 27°C (closed cup)
Evaporation Rate: 1.41 (butyl acetate=1)
Flammability: Flammable liquid and vapor
Upper/Lower Explosion Limit: 1.7–11.2% (v/v in air)
Vapor Pressure: 40 mmHg at 20°C
Vapor Density: 2.5 (air=1)
Relative Density: 0.8 g/cm³ at 20°C
Solubility in Water: 7 g/L at 20°C, miscible with most organic solvents
Partition Coefficient (n-octanol/water): 0.83
Auto-ignition Temperature: 200°C
Decomposition Temperature: Not specifically established
Viscosity: 0.63 mPa·s at 20°C
Chemical Stability: Stable under recommended storage conditions, prone to oxidation in air to form peroxides or acids
Reactivity: Reacts with strong oxidizers, acids, bases to generate heat, hazardous byproducts
Hazardous Reactions: May form explosive mixtures with air, forms peroxides with exposure to oxygen
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, acrolein, other irritating vapors
Conditions to Avoid: Exposure to air, heat, open flame, sources of ignition, incompatible materials
Likely Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Toxicity: LD50 oral (rat): 1770 mg/kg, LD50 dermal (rabbit): approx. 1430 mg/kg, LC50 inhalation (rat, 4h): approx. 8000 ppm
Corrosivity/Irritation: Causes moderate skin and eye irritation, inhalation causes irritation of respiratory tract
Chronic Effects: Prolonged exposure leads to dermatitis, sensitization uncommon, repeated exposure may cause liver or kidney effects
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, or OSHA
Mutagenicity: Inconclusive evidence from standard tests
Reproductive Toxicity: No direct evidence based on available data
Ecotoxicity: Toxic to aquatic organisms at high concentrations; LC50 (fish, 96 hr): 36 mg/L (Pimephales promelas)
Persistence and Degradability: Readily biodegradable in the environment under aerobic conditions
Bioaccumulative Potential: Low potential (log Kow 0.83)
Mobility in Soil: Highly mobile, leaches easily through soil to groundwater
Other Adverse Effects: Rapid degradation in water and soil, contributes vapors to atmospheric photochemical smog
Disposal Methods: Burn in a chemical incinerator equipped with afterburner and scrubber, dispose via licensed hazardous waste contractor
Contaminated Packaging: Rinse thoroughly before reuse or disposal, follow local disposal regulations
Special Precautions: Do not dispose of in drains, surface water, or soil, keep out of landfill without Permit, collect all spills and store for disposal
UN Number: UN1129
UN Proper Shipping Name: Butyraldehydes
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: II
Environmental Hazards: Not regulated as a marine pollutant
Special Precautions for User: Avoid exposure to heat or open flames during transport, ensure packaging is secure and labeled
Transport Labels: Flammable liquid (red diamond)
TSCA Status: Listed in Toxic Substances Control Act Inventory (USA)
DSL/NDSL (Canada): Listed
REACH (EU): Registered substance
OSHA Regulation: Classified as hazardous
SARA Title III: Listed under Sections 311/312 (hazardous chemicals), not under Section 313
WHMIS Classification (Canada): B2 (flammable liquid), D2B (toxic)
Right to Know: N-Butyraldehyde appears on state Right to Know lists (California Proposition 65, New Jersey, Pennsylvania)
Other Regulations: Check local, national regulations for specific workplace requirements and permissible exposure limits
