Product Name: 2-(Methacryloyloxy)Ethyl Acetoacetate
Chemical Formula: C10H14O5
CAS Number: 21282-97-3
Synonyms: AAEM, Methacryloyloxyethyl acetoacetate
Use: Often found in resin manufacturing, adhesives, specialty coatings, inks
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Recommended Restrictions: Industrial and professional use only, not for food, drug, or cosmetic purposes
GHS Classification: Skin Irritant (Category 2), Eye Irritant (Category 2A), Sensitizer (Category 1B)
Hazard Statements: Causes skin and eye irritation, sensitization through dermal contact possible
Pictograms: Exclamation mark
Signal Word: Warning
Precautionary Statements: Avoid skin and eye contact, wear protective gear, wash hands after handling
Symptoms of Exposure: Redness, itching, rash, watering eyes, coughing from inhalation of vapor or mist
Emergency Overview: Clear to pale yellow liquid with characteristic odor, flammable, may cause allergic reactions on contact
Chemical Identity: 2-(Methacryloyloxy)Ethyl Acetoacetate
CAS Number: 21282-97-3
Concentration: ≥ 98%
Impurities: ≤ 2% (typically hydroquinone as inhibitor or stabilizer)
Other Names: No significant secondary components
Mixture: Not a mixture
Inhalation: Move person to fresh air, give oxygen if breathing is difficult, seek medical attention if symptoms develop
Skin Contact: Immediately wash with soap and plenty of water, remove contaminated clothing, medical assistance for persistent irritation
Eye Contact: Rinse cautiously with water for 15 minutes while holding eyelids open, consult a physician if symptoms persist
Ingestion: Do not induce vomiting, rinse mouth, get medical help right away
Notes for Doctor: Treat symptomatically, monitor for allergic response or respiratory distress
Suitable Extinguishing Media: CO2, dry chemical powder, foam, water fog
Unsuitable Extinguishing Media: Direct water stream may spread fire
Special Hazards: Combustible, may emit toxic fumes like carbon monoxide and carbon dioxide during burning
Protective Equipment for Firefighters: Full protective gear including self-contained breathing apparatus
Firefighting Advice: Keep containers cool with water spray, stay upwind, avoid inhalation of fumes
Personal Precautions: Evacuate non-essential personnel, ventilate area, put on protective clothing and gloves
Environmental Precautions: Prevent spread to drains and waterways, alert authorities if substance enters environment
Clean-up Procedures: Contain spill, absorb with non-combustible material (sand, earth), scoop up into containers for disposal, wash spill site after clean-up
Disposal: Dispose according to local regulations as hazardous chemical waste
Safe Handling: Use only with good ventilation, avoid inhalation, prevent contact with skin, eyes, clothing
Hygiene Measures: Do not eat, drink, or smoke in areas where this chemical is handled, always wash hands after handling
Storage Conditions: Store in tightly closed original container, keep in cool, dry, well-ventilated place out of direct sunlight
Incompatible Materials: Strong oxidizers, acids, bases, peroxides, iron, rust, and heat sources
Other Advice: Keep away from ignition sources, use explosion-proof equipment, ground/bond containers during transfer
Occupational Exposure Limits: Not established for this compound, maintain levels as low as reasonably achievable
Engineering Controls: Use chemical fume hood, adequate ventilation, closed systems for handling large quantities
Personal Protective Equipment: Chemical-resistant gloves (nitrile recommended), safety goggles, lab coat, face shield if splash is possible
Respiratory Protection: If ventilation is inadequate or risk of inhalation, wear suitable NIOSH-approved respirator
Environmental Controls: Prevent chemical from entering drains, soil, water sources
Appearance: Clear to pale yellow liquid
Odor: Mildly pungent
Odor Threshold: No information available
pH: Not applicable
Melting Point/Freezing Point: Not determined (liquid at room temperature)
Boiling Point/Range: 120–130° C at reduced pressure
Flash Point: 120°C (Closed cup)
Evaporation Rate: Slower than butyl acetate
Flammability: Combustible
Upper/Lower Flammability Limits: No data available
Vapor Pressure: Low at 20°C
Vapor Density: Heavier than air
Relative Density: 1.08–1.12 g/cm³ at 20°C
Solubility: Slightly soluble in water, miscible with many organic solvents
Partition Coefficient: No data available
Auto-ignition Temperature: No data
Decomposition Temperature: >200°C
Viscosity: 11–15 mPa.s at 25°C
Chemical Stability: Stable under standard temperatures and pressures, polymerizes easily without stabilizer
Hazardous Reactions: Polymerization may occur with heat, light, peroxides, or in absence of inhibitor
Incompatible Materials: Strong acids, bases, oxidizing agents, iron and rust, amines
Conditions to Avoid: Heat, sparks, open fire, direct sunlight, sources of ignition
Hazardous Decomposition Products: Methacrylic acid, carbon oxides, heavy smoke in fire situations
Acute Toxicity: Oral LD50 (rat) > 2000 mg/kg (low acute toxicity by ingestion)
Skin Corrosion/Irritation: Causes moderate skin irritation
Eye Damage/Irritation: Can cause significant irritation
Respiratory Sensitization: May provoke coughing and irritation on inhalation
Skin Sensitization: Possible, especially in predisposed individuals
Chronic Effects: Repeated or prolonged exposure may aggravate eczema and skin allergies
Carcinogenicity, Mutagenicity, Reproductive Toxicity: No adequate evidence of carcinogenic or mutagenic potential in currently available studies
Other Health Effects: Allergic reactions possible after repeated skin contact
Ecotoxicity: Material is toxic to aquatic life in high concentrations
Persistence and Degradability: Expected to be biodegradable under aerobic conditions
Bioaccumulative Potential: Low; product not likely to accumulate in aquatic organisms
Mobility in Soil: Likely to have moderate mobility, may leach if spilled
Other Effects: Avoid release into natural water sources, even small leaks can impact smaller organisms like daphnia or fish
Waste Disposal Methods: Burn in a chemical incinerator equipped with afterburner and scrubber, or dispose by an authorized hazardous waste facility
Container Disposal: Rinse container before recycling, follow all local regulations for disposal
Precautions: Never dispose of chemical in normal trash, down sinks, or into surface water
Special Measures: Contaminated absorbents and cleaning materials should be treated as hazardous waste
UN Number: Not regulated under most national and international regulations for transport
Proper Shipping Name: Not classified as dangerous goods
Transport Hazard Class: Not classified
Packing Group: Not applicable
Environmental Hazards: Avoid releases during transport
Special Precautions: Secure tightly to avoid leaks, keep away from direct sunlight and sources of ignition
OSHA Standard: Not listed as a hazardous substance under OSHA, but safety precautions necessary
SARA 313: Not subject
TSCA Inventory: Listed
DSL/NDSL (Canada): Listed
REACH (EU): Registered substance
Other Regulations: Check all relevant national and local laws concerning use, handling, and disposal
Labeling Requirements: Proper hazard communication needed under GHS and WHMIS, including suitable hazard pictograms and statements
