CAS Number: 107-21-1

Also known as: 1,2-DIHYDROXY ETHANE, DIHYDROXYETHANE, DOWTHERM SRI (T), 1,2-Dihydroxyethane, 1,2-Ethanediol, Ethylene Alcohol, Ethylene Dihydrate, Glycol, Glycol Alcohol, Monoethylene Glycol, 2-Hydroxyethanol, Eg, Ethylene Glycol
Information on chemical

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List


CAS number 107-21-1
Formula C2H6O2

Physical chemical data

Physical State (20°C) Liquid
Physical State (25°C) Liquid
Density (kg/m3)
1115 [Kg/m³] at a temperature of 20°C
Kinematic viscosity (cSt)
18.9 [cSt] at a temperature of 20°C
15.05 [cSt] at a temperature of 25°C
Molar mass (g/mol) 62.07
Density of gas (kg/m3) 2.761
Solubility (g/L)
1110000 [g/L] at a temperature of 20°C and salinity of 0‰
Boiling Point (°C) 197.8
Melting Point (°C) -16
Critical temperature (°C) 720
Critical pressure (Pa) 8000000
Surface tension (mN/m)
48.4 [mN/m] at a temperature of 20°C
47.99 [mN/m] at a temperature of 25°C
Vapour Pressure (Pa)
2266 [Pa] at a temperature of 20°C
10 [Pa] at a temperature of 25°C
Ignition Temperature (°C) 410
Flash Point (°C) 111
Flash Point (Pensky-Martens closed cup) (°C) 111
Flash Point (Cleveland open cup) (°C) 115
Lower explosivity limit (LEL) (volume %) 3.2
Upper explosivity limit (UEL) (volume %) 15.3
Vapor enthalpy (J/Kg)
813598 [J/Kg] at a temperature of 198°C
1029482 [J/Kg] at a temperature of 25°C
Combus enthalpy (J/Kg) 17000000
Specific heat capacity (J/(Kg·K)) 2394.1
Combustion efficiency (%) 98
Mass flow rate of the combustion surface (Kg/(m²·s)) 0.02
Rad fraction (%) 22
Henry's constant (mol/(m³·Pa)) 0

Behaviour at sea

Log kow -1.93
Log koc 0.6
Aqueous photolysis (Half-life) Not photolysable
Biodegradation in estuary environment (Half-life) (days) Not hydrolysable
Biodegradation in marine environment (Half-life) (days) 50
Bioconcentration factor (BCF) 10

Additional data

Colour colourless
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.

Transportation data

Cargo group 20
State liquid
Temperature (°C) ambient
Pressure (Pa) ambient
Family name alcohols, glycols

Reactivity data

Abilities Miscible in water.
Acid(s) Yes
Base(s) Yes
Oxidizing agents Yes
Organic substance Yes
Notable risks Reacts with oxidizers.

GESAMP Hazard profile

Bioaccumulation in logPow (A1A) 0 - e <1, or > ca.7, or Mol. Wt. > 1000
Bioaccumulation (A1) 0 - No potential to bioaccumulate
Biodegradation (A2) R - Readily biodegradable
Acute aquatic toxicity (B1) (LC/EC/IC50 (mg/l)) 0 - Non-toxic
Acute mammalian toxicity by swallowing (C1) (LD50 (mg/kg)) 1 - Slight
Acute mammalian toxicity by skin penetration (C2) (LD50 (mg/kg)) 1 - Slight
Acute mammalian toxicity by inhalation (C3) (LC50 (mg/l)) 1 - Slight
Skin irritation/corrosivity (D1) 0 - Not irritating
Eye irritation/corrosivity (D2) 0 - Not irritating
Interference with coastal amenities (E2) D - Dissolver
Effects on wildlife and bottom habitats (E3) 1 - Is a floater; and/or is slightly acutely toxic; and/or is mildly irritant to skin and/or eyes

Human toxicity threshold

Harmful Health Hazard
Hazard statements
H302 Harmful if swallowed.
H373 May cause damage to organs through prolonged or repeated exposure, exposure cause the hazard:
TEEL-1 (mg/m3) 10 ppm
TEEL-2 (mg/m3) 40 ppm
TEEL-3 (mg/m3) 60 ppm


Lowest median lethal concentration (LC50) on algae (mg/l) 10000
Lowest median lethal concentration (LC50) on crustacean (mg/l) 20000
Lowest median lethal concentration (LC50) on fishes (mg/l) 56484
Highest no observed effect concentration (NOEC) on algae (mg/l) 5740
Highest no observed effect concentration (NOEC) on crustacean (mg/l) 3000
Assessment factor (AF)
1000 on the Short term
1000 on the Long term
Predicted No Effect Concentration (PNEC) (µg/l)
10000 [µg/l] on the Short term
3000 [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

No decision trees available

No additional data

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