CAS Number: 103-23-1

Also known as: ADIPATE DE DI-(2-ETHYLHEXYL), ADIPIC ACID, BIS(2-ETHYLHEXYL)ESTER, BIS(2-ETHYLHEXYL)ADIPATE, Adipic Acid, Bis(2-Ethylhexyl) Ester, Bis(2-Ethylhexyl) Hexanedioate, Di(2-Ethylhexyl)Adipate, Di-2-Ethylhexyl Adipate, Dioctyl Adipate, Hexanedioic Acid, Bis(2-Ethylhexyl) Ester, Hexanedioic Acid, Dioctyl Ester, Deha, Adipic Acid, Di-2-Ethylhexyl Ester, Bis(Ethyl-2-Hexyl) Adipate, Doa, Bis(2-Ethylhexyl) Adipate, Adipate De Di-2-Ethylhexyle
Information on chemical

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List


CAS number 103-23-1
Formula C22H42O4

Physical chemical data

Physical State (20°C) Liquid
Physical State (25°C) Liquid
Density (kg/m3)
923 [Kg/m³] at a temperature of 20°C
Kinematic viscosity (cSt)
14.2 [cSt] at a temperature of 20°C
Molar mass (g/mol) 370.58
Density of gas (kg/m3) 16.51
Solubility (g/L)
1 [g/L] at a temperature of 20°C and salinity of 0‰
Boiling Point (°C) 417
Melting Point (°C) -67.8
Surface tension (mN/m)
30.2 [mN/m] at a temperature of 20°C
Flash Point (°C) 204
Flash Point (Pensky-Martens closed cup) (°C) 196
Combus enthalpy (J/Kg) 33600000
Combustion efficiency (%) 96
Mass flow rate of the combustion surface (Kg/(m²·s)) 0.02
Rad fraction (%) 23
Henry's constant (mol/(m³·Pa)) 0.04

Behaviour at sea

Log kow 8.1
Log koc 5.78
Biodegradation in estuary environment (Half-life) (days) 1
Biodegradation in marine environment (Half-life) (days) 10
Bioconcentration factor (BCF) 27

Additional data

Colour clear to straw coloured
Odour odourless
MARPOL pollution category
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.
Standard behavior classification F/FE/E

Transportation data

Cargo group 34
State liquid
Temperature (°C) ambient
Family name esters

Reactivity data

Water No
Acid(s) Yes
Base(s) No
Metal(s) and alloys No
Oxidizing agents Yes

GESAMP Hazard profile

Bioaccumulation in logPow (A1A) 0 - e <1, or > ca.7, or Mol. Wt. > 1000
Bioaccumulation in BCF (A1B) 2 - ≥10 and <100
Bioaccumulation (A1) 2 - Low potential to bioaccumulate
Biodegradation (A2) R - Readily biodegradable
Acute aquatic toxicity (B1) (LC/EC/IC50 (mg/l)) 4 - Highly toxic
Chronic aquatic toxicity (B2) (NOEC (mg/l)) 2 - Moderate
Acute mammalian toxicity by swallowing (C1) (LD50 (mg/kg)) 0 - Negligible
Acute mammalian toxicity by skin penetration (C2) (LD50 (mg/kg)) 0 - Negligible
Acute mammalian toxicity by inhalation (C3) (LC50 (mg/l)) 0 - Negligible
Skin irritation/corrosivity (D1) 2 - Irritating
Eye irritation/corrosivity (D2) 1 - Mildly irritating
Interference with coastal amenities (E2) Fp - Persistent slick forming substance
Effects on wildlife and bottom habitats (E3) 3 - Is highly acutely toxic; and/or is severely irritant or corrosive to skin or eyes; and/or is carcinogenic, mutagenic or reprotoxic; and/or is a floater or persistent floater with associated health effects

Human toxicity threshold


Lowest median lethal concentration (LC50) on algae (mg/l) > 1.4
Lowest median lethal concentration (LC50) on crustacean (mg/l) > 0.23
Lowest median lethal concentration (LC50) on fishes (mg/l) > 0.78
Highest no observed effect concentration (NOEC) on algae (mg/l) > 0.78
Highest no observed effect concentration (NOEC) on crustacean (mg/l) 0.035
Assessment factor (AF)
100 on the Short term
100 on the Long term
Predicted No Effect Concentration (PNEC) (µg/l)
2.3 [µg/l] on the Short term
0.35 [µg/l] on the Long term
Incident reports

Incident reports

No incident reports available

Emergency Response Guidebook

Emergency Response Guidebook

No guides available

At sea emergency guide

At sea emergency guide

No guides available

Decision trees

Decision trees

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No additional data

last modified 2020-12-11T09:57:24+00:00