Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

 


 

Table 1, Physical and Chemical Properties of 2-methylbutyl acrylate (CAS# 44914-03-6)

Property

IUCLID Section number

REACh Column 1 number

Value

Data source

Klimisch rank

Note

Appearance/physical state/color

4.1

7.1

Clear, colourless liquid

Experimental

1

 

Melting point/Freezing point

4.2

7.2

≤-75 °C

Experimental

1

 

Boiling point

4.3

7.3

161.7 °C at 101.3 kPa

Experimental

2

Density

4.4

7.4

0.8886 g/cm3 at 25 °C

Experimental

2

 

Particles size distribution (Granulometry)

4.5

7.14

Not applicable

Waiving argument

N/A

Substance is a liquid 

Vapour pressure

4.6

7.5

1.7 hPa at 20 °C

Experimental

2

Partition coefficient (log Kow)

4.7

7.8

2.90

Experimental

1

 

Water Solubility

4.8

7.7

316 mg/L at 23.1 °C

Experimental

2

 

Surface tension

4.10

7.6

Not applicable

Waiving argument

N/A

Surfactancy not expected or desired property of substance

Flash point

4.11

7.9

49 °C

Experimental

1

 

Autoflammability

4.12

7.12

275 °C at 102.0 - 102.8 kPa

Experimental

1

 

Flammability

4.13

7.10

Flammable liquid 3 based on Flash Point.  No emanation of flammable gasses or spontaneous ignition on contact with water or air

Waiving argument

N/A

Flash point = 49 °C, but no emanation of flammable gasses or spontaneous ignition 

Explosiveness

4.14

7.11

Not applicable

Waiving argument

N/A

Consideration based on structure

Oxidizing properties

4.15

7.13

Not applicable

Waiving argument

N/A

Consideration based on structure

Stability in organic solvents and identity of relevant degradation products

4.17

7.15

Not applicable

Waiving argument

N/A

Stability not regarded to be critical 

Dissociation constant

4.21

7.16

Not applicable

Waiving argument

N/A

No dissociable groups 

Viscosity

4.22

7.17

0.998 mPa s at 25 °C

Experimental

2

 

Result from studies of n-butyl acrylate (n-BA, CAS# 141-32-2) will be used extensively in read-across to fill gaps regarding toxicity in the 2-methylbutyl acrylate data set.  Read-across from n-BA and isooctyl acrylate (CAS# 29590-42-9) will also be used to support existing ecotoxicology and fate data.  To help justify read-across of data, the following physical-chemical data are provided:

 

Data matrix – Analog approach

Target substance

Source substance (1)

Source substance (2)

CHEMICAL NAME

2-methylbutyl acrylate

n-butyl acrylate

Isooctyl acrylate

CAS#

44914-03-6

141-32-2

29590-42-9

Molecular formula

C8H14O2

C7H12O2

C11H20O2

(on average)

Molecular Weight

142.2

128.2

184.3 (on average)

PHYSICO-CHEMICAL DATA     

Melting Point

Experimental:

≤ -75 °C

Not available

Experimental:

< -90 °C at 1004 hPa

Boiling Point

Experimental:

161.7 °C at 1013hPa

Experimental:

147 °C at 1013hPa

Experimental:

196.8 °C at 1016 hPa

Density

Experimental:

0.8886 g/cm3 at 25 °C

Experimental:

0.9 g/cm3 at 20.0 °C

Experimental:

0.885 g/cm3 at 20.0 °C

Vapour Pressure

Experimental:

1.7 hPa at 20°C

Experimental:

5 hPa at 22.2°C

Experimental:

1 hPa at 20 °C

Partition Coefficient (log KOW)

Experimental:

2.9

Experimental:

2.38 (at 25°C)

Experimental:

4.5 - 4.7

Water Solubility

Experimental:

316 mg/L at 23 °C

Not available

Experimental:

12.44 mg/L at 23.1 °C