Methacrylic acid ethyl ester

Structural formula
General
Surname	Methacrylic acid ethyl ester
other names	Ethyl methacrylate EMA
Molecular formula	C 6 H 10 O 2
Brief description	Highly flammable, volatile, colorless liquid with a characteristic odor
External identifiers / databases
CAS number 97-63-2 EC number 202-597-5 ECHA InfoCard 100.002.362 PubChem 7343 Wikidata Q424811
properties
Molar mass	114.14 g mol −1
Physical state	liquid
density	0.91 g cm −3
Melting point	−61 to −59 ° C
boiling point	117 ° C
Vapor pressure	21.3 hPa (20 ° C) 88 hPa (50 ° C)
solubility	poor in water (5.1 g l −1 at 20 ° C) soluble in ethanol and diethyl ether
Refractive index	1.4128 (20 ° C, 589 nm)
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary danger H and P phrases H: 225-319-335-315-317 P: 210-261-280-305 + 351 + 338
Toxicological data	14,800 mg kg −1 ( LD 50 ,  rat ,  oral ) 38.7 mg l −1 ( LC 50 ,  rat , inhalation, 4 h )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Ethacrylic acid ethyl ester is a chemical compound from the group of carboxylic acid esters and the ethyl ester of methacrylic acid and thus an analogue of the acrylic acid ester ethyl acrylate .

properties

Methacrylic acid ethyl ester is a highly flammable, volatile, colorless liquid with a characteristic odor. The flash point is 19 ° C, the ignition temperature 385 ° C. The vapors of ethyl methacrylate can form an explosive mixture with air, which is below the explosion limit at 1.4 vol .-%. Its viscosity is 0.62 mPas. The heat of polymerization is −59.5 kJ mol ⁻¹ or −521 kJ kg ⁻¹ . It can polymerize explosively (which is why it is marketed in a stabilized form) and is sensitive to light and air.

use

Methacrylic acid ethyl ester is used for the production of acrylic polymers and plastic additives .

Risk assessment

Methacrylic acid ethyl ester was included in the EU's ongoing action plan ( CoRAP ) in 2013 in accordance with Regulation (EC) No. 1907/2006 (REACH) as part of the substance evaluation . The effects of the substance on human health and the environment are re-evaluated and, if necessary, follow-up measures are initiated. The reasons for the uptake of ethyl methacrylate were concerns about consumer use , high (aggregated) tonnage and widespread use as well as the dangers arising from a possible assignment to the group of CMR substances and the suspected dangers due to sensitizing properties. The re-evaluation took place from 2014 and was carried out by Italy . A final report was then published.

Individual evidence

1. ↑ ^{a b c d e f g h i j k l m n} Entry on ethyl methacrylate in the GESTIS substance database of the IFA , accessed on December 22, 2019(JavaScript required) .
2. ↑ ^{a b c d} Data sheet ethyl methacrylate (PDF) from Merck , accessed on June 12, 2010.
3. ↑ Entry on ethyl methacrylate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers and / or distributors can expand the harmonized classification and labeling .
4. ↑ Brandrup, J .; Immergut, EH; Grulke, EA; Abe, A .; Bloch, DR: Polymer Handbook , 4th Edition, Wiley-VCH 2003, ISBN 978-0-471-47936-9 , p. II / 369.
5. ↑ European Chemicals Agency (ECHA): Substance Evaluation Conclusion and Evaluation Report .
6. ↑ Community rolling action plan ( CoRAP ) of the European Chemicals Agency (ECHA): Ethyl methacrylate , accessed on May 1, 2020.