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

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Xylene (Mixed Isomers)

Description Top

CAS number 1330-20-7
UN number 1307
Chemical formula C8H10
Accident occurred Yes
Standard European Behaviour Classification (SEBC) Floater that evaporates (FE)
Notable risks Reacts with oxidizers Reacts with other compounds.
GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
3 NR 3 0 0 0 0 2 2 T FE 2

Marine pollution Classification (MARPOL Annex II)
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.

Alternate names for this chemical
Dimethylbenzene
Methyltoluene
Xylol
Xylene
Xylene, Mixed Isomers
Xylenes (Mixed)
Total Xylenes
Xylenes, Total
Mixed Xylene
Xylene (Mixed Isomers)
Xylenes (Mixture)


Physico-chemical properties Top

Chemical formula C8H10
Molar mass 106.16 [g/mol]
State Liquid at 25°C and 1 atm
Fusion temperature -19.97 [°C]
Boiling temperature 140 [°C]
Critical temperature 619.9 [°C]
Density
870 [Kg/m³] at a temperature of 20°C
879 [Kg/m³] at a temperature of 5°C
874.3 [Kg/m³] at a temperature of 10°C
867.7 [Kg/m³] at a temperature of 20°C
Surface tension
29.8 [mN/m] at a temperature of 25°C
29.04 [mN/m] at a temperature of 5.3°C
27.88 [mN/m] at a temperature of 10°C
26.96 [mN/m] at a temperature of 17.9°C
Kinematic viscosity
4.8 [cSt] at a temperature of 20°C
2.3891 [cSt] at a temperature of 5°C
2.3219 [cSt] at a temperature of 10°C
2.2012 [cSt] at a temperature of 20°C
Hydrosolubility
175 [mg/l] at a temperature of 20°C and salinity of 0‰
130 [mg/l] at a temperature of 20°C and salinity of 0‰
120 [mg/l] at a temperature of 20°C and salinity of 5‰
100 [mg/l] at a temperature of 20°C and salinity of 30‰
Vapour pressure
700 [Pa] at a temperature of 20°C
1070 [Pa] at a temperature of 25°C
Critical pressure 3540000 [Pa]
Vapour density 3.7
Flash point (Pensky-Martens closed cup) 25 [°C]
Flash point (Cleveland open cup) 25 [°C]
Lower explosivity limit (LEL) 1 [%]
Upper explosivity limit (UEL) 7 [%]
Vaporization enthalpy
335892 [J/Kg] at a temperature of 140°C
401733 [J/Kg] at a temperature of 25°C
Combustion enthalpy 40831000 [J/Kg]
Henry's constant 7 [mol/(m³·Pa)]


Behaviour Top

Log Kow 3.12
Log Koc 2.58
Hydrolysis (Half-life) Not hydrolysable
Aqueous photolysis (Half-life) Not photolysable
Biodegradation in estuary environment (Half-life) 150 days
Biodegradation in marine environment (Half-life) Not biodegradable
Standard European Behaviour Classification (SEBC) Floater that evaporates (FE)
Bioconcentration factor (BCF) 15


Ecotoxicity Top

Lowest median lethal concentration (LC50) on algae 3.2 [mg/l]
Lowest median lethal concentration (LC50) on crustacean 1.3 [mg/l]
Lowest median lethal concentration (LC50) on fishes 2.6 [mg/l]
Highest no observed effect concentration (NOEC) on algae 0.7 [mg/l]
Highest no observed effect concentration (NOEC) on crustacean 1.2 [mg/l]
Highest no observed effect concentration (NOEC) on fishes > 1.3 [mg/l]
Assessment factor (AF)
1000 on the short-term
10000 on the long-term
Predicted No Effect Concentration (PNEC)
1 [µg/l] on the short-term
0.1 [µg/l] on the long-term


Hazards Top

Flammable
Harmful

Warning

IDLH 900 [ppm]
Hazards statements
Physical
H226
Flammable liquid and vapour.
Health
H312
Harmful in contact with skin.
H315
Causes skin irritation.
H332
Harmful if inhaled.

Precautionary statements
Prevention
P210
Keep away from heat/sparks/open flames/hot surfaces. No smoking.
P243
Take precautionary measures against static discharge.
P260
Do not breathe dust/fume/gas/mist/vapours/spray.
P280
Wear protective gloves/protective clothing/eye protection/face protection.
Response
P303 + P361 + P353
IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower.
P332 + P313
If skin irritation occurs: Get medical advice/attention.


GESAMP Top

GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
3 NR 3 0 0 0 0 2 2 T 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
NI No Information
A2: Biodegradation
Rating Description
NR Not readily biodegradable
B1: Acute aquatic toxicity
Rating Description Criteria [mg/l]
3 Moderately toxic 1 < LC/EC/IC50 ≤ 10
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)
0 Negligible 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
2 Irritating Marked conjunctival hy Irritant Category 2A
D3: Long-term health effects
Notation Hazard endpoint Description GHS category
No Information
E1: Tainting of seafood
Rating Description
T Substances are considered to cause tainting if a statistically significant off-flavour or smell can be detected following exposure of the fish for 24h to 1mg/l or less.
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

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

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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.