Isobutyl methacrylate
CAS 97-86-9
EC 202-613-0
Formula C8H14O2
MW 142.2 g/mol
Monomers & Building Blocks Plastics & PolymersPrinting & PackagingCoatings, Adhesives, Sealants & ElastomersAutomotive Polymerization InitiationPlasticizer & SoftenerSurface Modification & Wetting
Description
Isobutyl methacrylate (CAS 97-86-9) is a methacrylate ester monomer commercially known under trade names including Light Ester IB and I 205. It carries no assigned E-code and is registered under EC 202-613-0. The compound polymerises readily under free-radical conditions to form soft, flexible acrylic polymers.
In coatings and adhesives, isobutyl methacrylate is copolymerised with harder monomers to control film flexibility and glass transition temperature, enabling formulators to tune mechanical properties precisely. In automotive and printing applications, it functions as a reactive plasticiser within polymer networks, reducing brittleness without migrating out of the cured matrix over time.
Isobutyl methacrylate is supplied as a technical-grade liquid and falls under REACH registration requirements for EU market supply. It is classified under HS code 29161290 for customs purposes. Packaging formats typically include drums and IBC containers, with stabilised grades available to prevent premature polymerisation during storage and transport.
In coatings and adhesives, isobutyl methacrylate is copolymerised with harder monomers to control film flexibility and glass transition temperature, enabling formulators to tune mechanical properties precisely. In automotive and printing applications, it functions as a reactive plasticiser within polymer networks, reducing brittleness without migrating out of the cured matrix over time.
Isobutyl methacrylate is supplied as a technical-grade liquid and falls under REACH registration requirements for EU market supply. It is classified under HS code 29161290 for customs purposes. Packaging formats typically include drums and IBC containers, with stabilised grades available to prevent premature polymerisation during storage and transport.
Physical Properties
| Melting Point | -37 °C |
| Boiling Point | 155 °C @ Press: 760 Torr |
| Density | 0.8858 g/cm³ @ Temp: 20 °C |
| Flash Point | 107 °F |
| Appearance | colourless liquid |
| Color | Clear colorless |
| Odor | ether-like odor |
| Form | Liquid |
| Water Solubility | Soluble in water at 20°C, 2g/L |
| Vapor Pressure | 3.5 mm Hg ( 20 °C) |
| Refractive Index | n 20/D 1.420(lit.) |
| Log P | 2.95 at 20℃ |
Safety & Handling (Learn More)
Warning GHS02 GHS07 GHS09
H
H226H315H317H319H320H335H400H402
P
P210P233P240P241P242P243P261P264P271P272P273P280P319P321P391P405P501P264+P265P302+P352P304+P340P332+P317P333+P317P337+P317P362+P364P370+P378P403+P233P403+P235P303+P361+P353P305+P351+P338
Trade & Regulatory
| HS Code | 29161290 |
| UN Number | 2283 |
| ADR Class | 3 |
| Packing Group | III |
| WGK (Germany) | 1 |
Other Names
2-methylpropyl 2-methylprop-2-enoateIBMAI 205Light Ester IBI 205 (methacrylate)ISO-BUTYL NETHACRYLATEIsobutyl α-methylacrylate
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