Tert-Amyl Methyl Ether

CAS Number: 994-05-8

Also known as: 2-Methoxy-2-Methyl-Butane, Methyl-Tert-Pentyl Ether, 1,1-Dimethylpropyl Methyl Ether, Tame, Tert-Amyl Methyl Ether, Tertioamymethylether
Information on chemical

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List


CAS number 994-05-8
Formula C6H14O

Physical chemical data

Physical State (25°C) Liquid
Molar mass (g/mol) 102.174
Solubility (g/L)
2640 [g/L] at a temperature of 25°C and salinity of 0‰
Boiling Point (°C) 86.1
Melting Point (°C) -80
Critical molar volume (m³/mol) 0.000374
Critical temperature (°C) 535
Critical pressure (Pa) 3200000
Flash Point (Pensky-Martens closed cup) (°C) -7
Lower explosivity limit (LEL) (volume %) 1.1
Upper explosivity limit (UEL) (volume %) 7.4
Specific heat capacity (J/(Kg·K)) 2949
Henry's constant (mol/(m³·Pa)) 133.7

Behaviour at sea

Log kow 1.92
Log koc 1.36
Aqueous photolysis (Half-life) Not photolysable
Biodegradation in estuary environment (Half-life) (days) Not hydrolysable
Biodegradation in marine environment (Half-life) (days) Not biodegradable
Bioconcentration factor (BCF) 5

Additional data

MARPOL pollution category
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.

Transportation data

Reactivity data

GESAMP Hazard profile

Bioaccumulation in logPow (A1A) 1 - ≥1 and <2
Bioaccumulation (A1) 1 - Very low potential to bioaccumulate
Acute aquatic toxicity (B1) (LC/EC/IC50 (mg/l)) 4 - Highly toxic
Acute mammalian toxicity by swallowing (C1) (LD50 (mg/kg)) 1 - Slight
Acute mammalian toxicity by skin penetration (C2) (LD50 (mg/kg)) 0 - Negligible
Acute mammalian toxicity by inhalation (C3) (LC50 (mg/l)) 2 - Moderate
Skin irritation/corrosivity (D1) 0 - Not irritating
Eye irritation/corrosivity (D2) 1 - Mildly irritating
Interference with coastal amenities (E2) ED - Evaporator/Dissolver
Effects on wildlife and bottom habitats (E3) 2 - Is a persistent floater; and/or is moderately acutely toxic; and/or is irritating to skin and/or eyes; and/or has long-term health effects other than carcinogenicity, mutagenicity or reprotoxicity; and/or is highly flammable; and/or is flammable and is a floater with evaporative properties

Human toxicity threshold

Flammable Harmful
Hazard statements
H225 Highly flammable liquid and vapour.
H302 Harmful if swallowed.
H336 May cause drowsiness or dizziness.
Precautionary statements
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.
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.
P403 + P235 Store in a well-ventilated place. Keep cool.


Lowest median lethal concentration (LC50) on crustacean (mg/l) 14
Lowest median lethal concentration (LC50) on fishes (mg/l) 580
Highest no observed effect concentration (NOEC) on algae (mg/l) 77
Highest no observed effect concentration (NOEC) on crustacean (mg/l) 51
Highest no observed effect concentration (NOEC) on fishes (mg/l) 63.9
Assessment factor (AF)
50 on the Long term
Predicted No Effect Concentration (PNEC) (µg/l)
68 [µg/l] on the Long term
Incident reports

Incident reports

No incident reports available

Emergency Response Guidebook

Emergency Response Guidebook

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At sea emergency guide

At sea emergency guide

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Decision trees

Decision trees

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No additional data

last modified 2020-12-11T09:57:21+00:00