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Improving Member States preparedness to face an HNS pollution of the Marine System (HNS-MS)

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2-Ethylhexanoic Acid

Description Top

CAS number 149-57-5
Chemical formula C8H16O2
Standard European Behaviour Classification (SEBC) Floater that dissolves (FD)
GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
2 R 2 NI 0 0 2 2 2 NI FD 3

Marine pollution Classification (MARPOL Annex II)
Category Description
Y Noxious Liquid Substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a hazard to either marine resources or human health or cause harm to amenities or other legitimate uses of the sea and therefore justify a limitation on the quality and quantity of the discharge into the marine environment.

Alternate names for this chemical
2-Ethylcaproic Acid
2-Ethyl-Hexanoic Acid
Ethylhexoic Acid
Ethylhexanoic Acid
2-Ethylhexanoic Acid
Acide 2-EthylhexanoÏQue


Physico-chemical properties Top

Chemical formula C8H16O2
Molar mass 144.212 [g/mol]
Critical molar volume 0.000528 [m³/mol]
State Liquid at 25°C and 1 atm
Fusion temperature -59 [°C]
Boiling temperature 228 [°C]
Critical temperature 674 [°C]
Density
903.1 [Kg/m³] at a temperature of 25°C
917.3 [Kg/m³] at a temperature of 5°C
914.2 [Kg/m³] at a temperature of 10°C
906.1 [Kg/m³] at a temperature of 20°C
Surface tension
28.42 [mN/m] at a temperature of 6.9°C
27.62 [mN/m] at a temperature of 11.2°C
26.86 [mN/m] at a temperature of 19.5°C
Kinematic viscosity
8.64 [cSt] at a temperature of 20°C
17.911 [cSt] at a temperature of 5°C
14.034 [cSt] at a temperature of 10°C
9.2815 [cSt] at a temperature of 20°C
Hydrosolubility
2000 [mg/l] at a temperature of 20°C and salinity of 0‰
1400 [mg/l] at a temperature of 25°C and salinity of 0‰
1640 [mg/l] at a temperature of 20°C and salinity of 0‰
1680 [mg/l] at a temperature of 20°C and salinity of 5‰
960 [mg/l] at a temperature of 20°C and salinity of 30‰
Vapour pressure
4 [Pa] at a temperature of 20°C
Critical pressure 2780000 [Pa]
Vapour density 5
Flash point (Pensky-Martens closed cup) 114 [°C]
Flash point (Cleveland open cup) 118 [°C]
Lower explosivity limit (LEL) 0.8 [%]
Upper explosivity limit (UEL) 6 [%]
Vaporization enthalpy
524563 [J/Kg] at a temperature of 25°C
Henry's constant 0.28 [mol/(m³·Pa)]


Behaviour Top

Log Kow 2.64
Log Koc 1.43
Hydrolysis (Half-life) Not hydrolysable
Aqueous photolysis (Half-life) Not photolysable
Biodegradation in estuary environment (Half-life) 5 days
Standard European Behaviour Classification (SEBC) Floater that dissolves (FD)
Bioconcentration factor (BCF) 3


Ecotoxicity Top

Lowest median lethal concentration (LC50) on fishes 70 [mg/l]
Highest no observed effect concentration (NOEC) on algae 0.45 [mg/l]
Highest no observed effect concentration (NOEC) on crustacean 18 [mg/l]
Assessment factor (AF)
500 on the short-term
Predicted No Effect Concentration (PNEC)
36 [µg/l] on the short-term


Hazards Top

Health Hazard

Warning

Hazards statements
Health
H361
Suspected of damaging fertility or the unborn child.


GESAMP Top

More information on GESAMP Hazard Evaluation Procedure

GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
2 R 2 NI 0 0 2 2 2 NI FD 3

A1: Bioaccumulation
Rating Description
2 Low potential to bioaccumulate
A1a:
Rating Description Criteria [mg/l]
2 Low potential to bioaccumulate 2 ≤ Log Kow < 3
A1b:
Rating Description
NI No Information
A2: Biodegradation
Rating Description
R Readily biodegradable
B1: Acute aquatic toxicity
Rating Description Criteria [mg/l]
2 Slightly toxic 10 < LC/EC/IC50 ≤ 100
B2: Chronic aquatic toxicity
Rating Description
NI No Information
C1: Acute oral toxicity
Rating Description Criteria [mg/Kg]
0 Negligible AOTE > 2000
C2: Acute dermal toxicity (skin contact)
Rating Description Criteria [mg/Kg]
0 Negligible ADTE > 2000
C3: Acute inhalation toxicity
Rating Description Criteria [mg/l] (4 hours exposure)
2 Moderate 2 < AITE ≤ 10
D1: Skin irritation or corrosion
Rating Description Sign GHS category
2 Irritating Marked erythema, Obvio Irritant Category 2
D2: Eye irritation
Rating Description Sign GHS category
2 Irritating Marked conjunctival hy Irritant Category 2A
D3: Long-term health effects
Notation Hazard endpoint Description GHS category
No Information
E1: Tainting of seafood
Rating Description
NI No Information
E2: Behaviour of chemicals in the marine environment
Rating Description
FD Floater that dissolves
E3: Interference with the use of coastal amenities
Rating Interference Description Interpretation Warning
3 Highly objectionable 1 is highly acutely toxic; and/or 2 is severely irritant or corrosive to skin or eyes; and/or 3 is carcinogenic, mutagenic or reprotoxic; and/or 4 is a floater or persistent floater with associated health effects 1 C1 and/or C2 and/or C3 = 4; and/or 2 D1 or D2 = 3, 3A, 3B, or 3C; and/or 3 D3 contains C, M or R; and/or 4 E2 = F or Fp and D3 contains Ss, Sr, T, A, N, or I Warning issued leading to the closure of amenities

GHS Security Information

Health Hazard

Warning

  About the project

HNS-MS is a decision-support tool that Belgian and French maritime authorities as well as coastguard stations can activate in order to forecast the drift, fate and behavior of acute marine pollution by Harmful Noxious Substances (HNS) accidentally released in the marine system.

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EU flagHNS-MS has been funded by DG-ECHO under agreement ECHO/SUB/2014/693705 and runs from 1 January 2015 to 31 March 2017.