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

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Ethyl Tert-Butyl Ether

Description Top

CAS number 637-92-3
UN number 1993
Chemical formula C6H14O
Standard European Behaviour Classification (SEBC) Evaporator (E)
GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
1 NI 2 NI 0 0 2 2 2 NI E 2

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
Tert-Butyl Ethyl Ether
1,1-Dimethylethyl Ethyl Ether
2-Ethoxy-2-Methylpropane
Ethyl 1,1-Dimethylethyl Ether
Ethyl Tert-Butyl Oxide
Methyl-2-Ethoxypropane
2-Methyl-2-Ethoxypropane
Ethyl T-Butyl Ether
Ethyl Tert-Butyl Ether


Physico-chemical properties Top

Chemical formula C6H14O
Molar mass 102.17 [g/mol]
Critical molar volume 0.000395 [m³/mol]
State Liquid at 25°C and 1 atm
Fusion temperature -94 [°C]
Boiling temperature 73.1 [°C]
Critical temperature 509.4 [°C]
Density
750 [Kg/m³] at a temperature of 20°C
Hydrosolubility
12400 [mg/l] at a temperature of 20°C and salinity of 0‰
13000 [mg/l] at a temperature of 25°C and salinity of 0‰
Vapour pressure
20664.97 [Pa] at a temperature of 25°C
Critical pressure 2934000 [Pa]
Vapour density 3.8
Combustion enthalpy 36300000 [J/Kg]
Combustion efficiency 96 [%]
Mass flow rate of the combustion surface 0.08 [Kg/(m²·s)]
Radiative fraction 23 [%]
Henry's constant 165.6 [mol/(m³·Pa)]


Behaviour Top

Log Kow 1.68
Log Koc 2.29
Hydrolysis (Half-life) Not hydrolysable
Aqueous photolysis (Half-life) Not photolysable
Biodegradation in estuary environment (Half-life) Not biodegradable
Biodegradation in marine environment (Half-life) Not biodegradable
Standard European Behaviour Classification (SEBC) Evaporator (E)
Bioconcentration factor (BCF) 11.1


Ecotoxicity Top

Lowest median lethal concentration (LC50) on algae 1100 [mg/l]
Lowest median lethal concentration (LC50) on crustacean 37 [mg/l]
Lowest median lethal concentration (LC50) on fishes 41.5 [mg/l]
Highest no observed effect concentration (NOEC) on algae 7.5 [mg/l]
Highest no observed effect concentration (NOEC) on crustacean 51 [mg/l]
Highest no observed effect concentration (NOEC) on fishes 63.9 [mg/l]
Assessment factor (AF)
1000 on the short-term
10000 on the long-term
Predicted No Effect Concentration (PNEC)
37 [µg/l] on the short-term
3.7 [µg/l] on the long-term


Hazards Top

Flammable
Harmful

Danger

Hazards statements
Physical
H225
Highly flammable liquid and vapour.
Health
H336
May cause drowsiness or dizziness.

Precautionary statements
Prevention
P210
Keep away from heat/sparks/open flames/hot surfaces. No smoking.
P243
Take precautionary measures against static discharge.
P261
Avoid breathing dust/fume/gas/mist/vapours/spray.
P271
Use only outdoors or in a well-ventilated area.
Storage
P403 + P233
Store in a well-ventilated place. Keep container tightly closed.


GESAMP Top

GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
1 NI 2 NI 0 0 2 2 2 NI E 2

A1: Bioaccumulation
Rating Description
1 Very low potential to bioaccumulate
A1a:
Rating Description Criteria [mg/l]
1 Very low potential to bioaccumulate 1 ≤ Log Kow < 2
A1b:
Rating Description
NI No Information
A2: Biodegradation
Rating Description
NI No Information
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
E Evaporator
E3: Interference with the use of coastal amenities
Rating Interference Description Interpretation Warning
2 Moderately objectionable 1 is a persistent floater; and/or 2 is moderately acutely toxic; and/or 3 is irritating to skin and/or eyes; and/or 4 has long-term health effects other than carcinogenicity, mutagenicity or reprotoxicity; and/or 5 is highly flammable; and/or 6 is moderately flammable and is a floater with evaporative properties 1 E2 = Fp; and/or 2 C1 and/or C2 and/or C3 = 23; and/or 3 D1 and/or D2 = 2; and/or 4 D3 contains Ss, Sr, T, A, N, or I; and/or 5 Flashpoint <23°C; and/or 6 Flashpoint 23°C to 60°C and E2 = FE or FED Warning issued and possible closure of amenities

GHS Security Information

Flammable
Harmful

Danger

  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.

  Contact us

Web: https://www.hns-ms.eu/

Tel : +32 (0)2 773-2102

Mail : hns-ms@naturalsciences.be

Copyright © 2015–2019 HNS-MS Consortium

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.