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

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Tert-Amyl Methyl Ether

Description Top

CAS number 994-05-8
Chemical formula C6H14O
Standard European Behaviour Classification (SEBC) Evaporator that dissolves (ED)
GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
1 NI 4 NI 1 0 2 0 1 NI ED 2

Marine pollution Classification (MARPOL Annex II)
Category Description
X Noxious Liquid Substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a major hazard to either marine resources or human health and, therefore, justify the prohibition of the discharge into the marine environment.

Alternate names for this chemical
2-Methoxy-2-Methyl-Butane
Methyl-Tert-Pentyl Ether
1,1-Dimethylpropyl Methyl Ether
Tame
Tert-Amyl Methyl Ether
Tertioamymethylether


Physico-chemical properties Top

Chemical formula C6H14O
Molar mass 102.174 [g/mol]
Critical molar volume 0.000374 [m³/mol]
State Liquid at 25°C and 1 atm
Fusion temperature -80 [°C]
Boiling temperature 86.1 [°C]
Critical temperature 535 [°C]
Density
766 [Kg/m³] at a temperature of 25°C
Hydrosolubility
2640 [mg/l] at a temperature of 25°C and salinity of 0‰
Vapour pressure
9000 [Pa] at a temperature of 20°C
10026 [Pa] at a temperature of 25°C
Critical pressure 3200000 [Pa]
Vapour density 3.6
Flash point (Pensky-Martens closed cup) -7 [°C]
Lower explosivity limit (LEL) 1.1 [%]
Upper explosivity limit (UEL) 7.4 [%]
Specific heat capacity 2949 [J/(Kg·K)]
Henry's constant 133.7 [mol/(m³·Pa)]


Behaviour Top

Log Kow 1.92
Log Koc 1.36
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 that dissolves (ED)
Bioconcentration factor (BCF) 5


Ecotoxicity Top

Lowest median lethal concentration (LC50) on crustacean 14 [mg/l]
Lowest median lethal concentration (LC50) on fishes 580 [mg/l]
Highest no observed effect concentration (NOEC) on algae 77 [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)
50 on the long-term
Predicted No Effect Concentration (PNEC)
68 [µg/l] on the long-term


Hazards Top

Flammable
Harmful

Danger

Hazards statements
Physical
H225
Highly flammable liquid and vapour.
Health
H302
Harmful if swallowed.
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.
Response
P301 + P312
IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell.
P304 + P340
IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
Storage
P403 + P235
Store in a well-ventilated place. Keep cool.


GESAMP Top

GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
1 NI 4 NI 1 0 2 0 1 NI ED 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]
4 Highly toxic 0.1 < LC/EC/IC50 ≤ 1
B2: Chronic aquatic toxicity
Rating Description
NI No Information
C1: Acute oral toxicity
Rating Description Criteria [mg/Kg]
1 Slight 300 < 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
0 Not irritating No clinical signs and/
D2: Eye irritation
Rating Description Sign GHS category
1 Mildly irritating Mild conjunctival hype Irritant Category 2B
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
ED Evaporator that dissolves
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.