Product Identification
【Product Name】Octadecyl methacrylate
【Synonyms】Stearyl methacrylate   甲基丙烯酸十八酯
【CAS】32360-05-7
【Formula】C22H42O2
【Molecular Weight】338.57
【EINECS】251-013-5

Physical and Chemical Properties
【Appearance】White waxy solid with a musty odor.
【Solubility in water】Insoluble
【Melting Point】24℃
【Boiling Point】414℃
【Vapor Pressure】4.5E-7 (25℃)
【Density】0.86 g/cm3 (25℃)
【Partition Coefficient】10.38
【Heat Of Vaporization】66.7 kJ/mol

First Aid Measures
【Ingestion】Ingestion unlikely. However, if ingested, obtain emergency medical attention.
【Inhalation】If overcome by exposure, remove victim to fresh air immediately. Give oxygen or artificial respiration as needed. Obtain emergency medical attention. Prompt action is essential.
【Skin】Immediately remove contaminated clothing. Wash skin thoroughly with mild soap/water. Flush w/lukewarm water for 15 minutes. If sticky, use waterless cleaner first. Seek medical attention if ill effect or irritation develops.
【Eyes】In case of eye contact, immediately rinse with clean water for 20-30 minutes. Retract eyelids often. Obtain emergency medical attention.

Handling and Storage
【Storage】Prevent moisture contact. Store in tightly closed, properly vented containers away from heat, sparks, flame, strong oxidizers, radiation and other initiators. Prevent contamination by foreign materials. Use only non-sparking tools and limit storage time.

Hazards Identification
【Skin】This material is expected to be a skin irritant. This material may cause an allergic skin reaction (sensitization) in susceptible individuals upon repeated exposure.
【Eyes】This material is expected to cause eye irritation.
【Hazards】High temperatures, inhibitor depletion, accidental impurities, or exposure to radiation or oxidizers may cause spontaneous polymerizing reaction generating heat/pressure. Closed containers may rupture or explode during runaway polymerization.

Exposure Controls/Personal Protection
【Personal Protection】Eye protection such as chemical splash ggles and/or face shield must be worn when possibility exists for eye contact due to splashing or spraying liquid, airborne particles, or vapor. Contact lenses should not be worn. When skin contact is possible, protective clothing including gloves, apron, sleeves, boots, head and face protection should be worn. This equipment must be cleaned thoroughly after each use.
【Exposure Effects】This material or its emissions may induce an allergic or sensitization reaction and thereby aggravate systemic disease.
【Poison Class】5

Fire Fighting Measures
【Flash Point】185℃
【Fire Fighting】Extinguish with dry chemical, CO2, water spray, foam or water fog. Do not enter fire area without proper protection. Fight fire from safe distance/protected location. Heat/impurities may increase temperature/build pressure/rupture closed containers, sping fire, increasing risk of burns/injuries. Water may be ineffective in firefighting due to low solubility. Use water spray/fog for cooling. Pressure relief system may plug with solids, increasing risk of overpressure. Notify authorities if liquid enters sewer/public waters.

Accidental Release Measures
【Small spills/leaks】Spilled or released material may polymerize and release heat/gases. Extinguish all ignition sources and ventilate area. Wear protective equipment during cleanup. Dike and recover large spill. Soak up small spill with inert solids (such as vermiculite, clay) and sweep/shovel into vented disposal container. Wash spill area with a strong detergent and water solution; rinse with water but minimize water use during cleanup. For spills on water, contain, minimize dispersion and collect. Dispose/report per regulatory requirements.

Stability and Reactivity
【Incompatibilities】Strong oxidizing agents, reducing agents, free radical initiators.
【Stability】Unstable (reactive) upon depletion of inhibitor. Hazardous polymerization may occur