EU flagHNS-MS has been funded by DG-ECHO under agreement ECHO/SUB/2014/693705
 hns-ms@naturalsciences.be
logo

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

· Search result ·

1,2,4-Trimethylbenzene

Description Top

CAS number 95-63-6
Chemical formula C9H12
Standard European Behaviour Classification (SEBC) Floater that evaporates (FE)
GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
3 NR 4 0 0 0 1 2 1 NI FE 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
Pseudocumene
Trimethyl-1,2,4 Benzene
Trimethylbenzene
1,2,4-Trimethylbenzene
1,2,4-Trimethyl Benzene


Physico-chemical properties Top

Chemical formula C9H12
Molar mass 120.19 [g/mol]
State Liquid at 25°C and 1 atm
Fusion temperature -60.5 [°C]
Boiling temperature 169.5 [°C]
Critical temperature 649.1 [°C]
Density
880 [Kg/m³] at a temperature of 20°C
Surface tension
29.2 [mN/m] at a temperature of 25°C
Kinematic viscosity
0.843 [cSt] at a temperature of 20°C
Hydrosolubility
60 [mg/l] at a temperature of 20°C and salinity of 0‰
42 [mg/l] at a temperature of 25°C and salinity of 0‰
40 [mg/l] at a temperature of 25°C and salinity of 34.5‰
Vapour pressure
133.32 [Pa] at a temperature of 20°C
256 [Pa] at a temperature of 25°C
Critical pressure 3232000 [Pa]
Vapour density 3.4
Flash point (Pensky-Martens closed cup) 44 [°C]
Lower explosivity limit (LEL) 0.9 [%]
Upper explosivity limit (UEL) 6.4 [%]
Vaporization enthalpy
398785 [J/Kg] at a temperature of 25°C
Combustion enthalpy 41000000 [J/Kg]
Specific heat capacity 1789 [J/(Kg·K)]
Combustion efficiency 70 [%]
Mass flow rate of the combustion surface 0.06 [Kg/(m²·s)]
Radiative fraction 30 [%]
Henry's constant 624.162 [mol/(m³·Pa)]


Behaviour Top

Log Kow 3.78
Log Koc 3.33
Hydrolysis (Half-life) Not hydrolysable
Aqueous photolysis (Half-life) Not photolysable
Biodegradation in estuary environment (Half-life) 10 days
Biodegradation in marine environment (Half-life) 10 days
Standard European Behaviour Classification (SEBC) Floater that evaporates (FE)
Bioconcentration factor (BCF) 152


Ecotoxicity Top

Lowest median lethal concentration (LC50) on crustacean 4.35 [mg/l]
Lowest median lethal concentration (LC50) on fishes 7.72 [mg/l]
Assessment factor (AF)
1 on the short-term
Predicted No Effect Concentration (PNEC)
120 [µg/l] on the short-term


Hazards Top

Flammable
Harmful
Environmental Hazard

Warning

Hazards statements
Physical
H226
Flammable liquid and vapour.
Health
H315
Causes skin irritation.
H319
Causes serious eye irritation.
H332
Harmful if inhaled.
H335
May cause respiratory irritation.
Environmental
H411
Toxic to aquatic life with long lasting effects.

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.
P280
Wear protective gloves/protective clothing/eye protection/face protection.
Response
P301 + P310
IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P302 + P352
IF ON SKIN: Wash with plenty of soap and water.


GESAMP Top

GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
3 NR 4 0 0 0 1 2 1 NI FE 2

A1: Bioaccumulation
Rating Description
3 Moderate potential to bioaccumulate
A1a:
Rating Description Criteria [mg/l]
3 Moderate potential to bioaccumulate 3 ≤ Log Kow < 4
A1b:
Rating Description Criteria
3 Moderate potential to bioaccumulate 100 ≤ BCF < 500
A2: Biodegradation
Rating Description
NR Not readily biodegradable
B1: Acute aquatic toxicity
Rating Description Criteria [mg/l]
4 Highly toxic 0.1 < LC/EC/IC50 ≤ 1
B2: Chronic aquatic toxicity
Rating Description Criteria [mg/l]
0 Negligible NOEC > 1
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)
1 Slight 10 < AITE ≤ 20
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
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
FE Floater that evaporates
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
Environmental Hazard

Warning

  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.