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

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Methacrylic Acid

Description Top

CAS number 79-41-4
UN number 2531
Chemical formula C4H6O2
Standard European Behaviour Classification (SEBC) Dissolves (D)
GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
0 R 2 0 1 2 2 3 3 NI D 3

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
2-Methacrylic Acid
2-Methyl-2-Propenoic Acid
Methacrylic Acid
Acide Methacrylique


Physico-chemical properties Top

Chemical formula C4H6O2
Molar mass 86.09 [g/mol]
State Solid at 25°C and 1 atm
Fusion temperature 16 [°C]
Boiling temperature 162.5 [°C]
Density
1015.3 [Kg/m³] at a temperature of 20°C
Surface tension
65.9 [mN/m] at a temperature of 20°C
Kinematic viscosity
1.28 [cSt] at a temperature of 20°C
Hydrosolubility
89000 [mg/l] at a temperature of 20°C and salinity of 0‰
89000 [mg/l] at a temperature of 25°C and salinity of 0‰
Vapour pressure
86.6 [Pa] at a temperature of 20°C
133 [Pa] at a temperature of 25°C
Vapour density 2.97
Flash point (Cleveland open cup) 77 [°C]
Lower explosivity limit (LEL) 1.6 [%]
Upper explosivity limit (UEL) 8.8 [%]
Specific heat capacity 1871 [J/(Kg·K)]
Henry's constant 0.039 [mol/(m³·Pa)]


Behaviour Top

Log Kow 0.93
Log Koc 0.35
Hydrolysis (Half-life) Not hydrolysable
Aqueous photolysis (Half-life) Not photolysable
Standard European Behaviour Classification (SEBC) Dissolves (D)
Bioconcentration factor (BCF) 3.1


Ecotoxicity Top

Lowest median lethal concentration (LC50) on algae 45 [mg/l]
Lowest median lethal concentration (LC50) on crustacean 140 [mg/l]
Lowest median lethal concentration (LC50) on fishes 85 [mg/l]
Highest no observed effect concentration (NOEC) on algae 8.2 [mg/l]
Highest no observed effect concentration (NOEC) on crustacean 53 [mg/l]
Highest no observed effect concentration (NOEC) on fishes 10 [mg/l]
Assessment factor (AF)
50 on the short-term
Predicted No Effect Concentration (PNEC)
164 [µg/l] on the short-term


Hazards Top

Corrosive
Toxic

Danger

Hazards statements
Health
H302
Harmful if swallowed.
H311
Toxic in contact with skin.
H314
Causes severe skin burns and eye damage.
H332
Harmful if inhaled.
H335
May cause respiratory irritation.

Precautionary statements
Prevention
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.
P305 + P351 + P338
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Storage
P405
Store locked up.
Disposal
P501
Dispose of contents/container to ...


GESAMP Top

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

A1: Bioaccumulation
Rating Description
0 No potential to bioaccumulate
A1a:
Rating Description Criteria [mg/l]
0 No potential to bioaccumulate Log Kow < 1
A1b:
Rating Description
NI No Information
A2: Biodegradation
Rating Description
R Readily biodegradable
B1: Acute aquatic toxicity
Rating Description Criteria [mg/l]
2 Slightly toxic 10 < LC/EC/IC50 ≤ 100
B2: Chronic aquatic toxicity
Rating Description Criteria [mg/l]
0 Negligible NOEC > 1
C1: Acute oral toxicity
Rating Description Criteria [mg/Kg]
1 Slight 300 < AOTE ≤ 2000
C2: Acute dermal toxicity (skin contact)
Rating Description Criteria [mg/Kg]
2 Moderate 200 < ADTE ≤ 1000
C3: Acute inhalation toxicity
Rating Description Criteria [mg/l] (4 hours exposure)
2 Moderate 2 < AITE ≤ 10
D1: Skin irritation or corrosion
Rating Description Sign GHS category
3 Severely irritating or corrosive Severe irritation indi Corrosive Category 1
D2: Eye irritation
Rating Description Sign GHS category
3 Severely irritating or corrosive Severe conjunctoblepha Irritant Category 1
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
D Dissolves
E3: Interference with the use of coastal amenities
Rating Interference Description Interpretation Warning
3 Highly objectionable 1 is highly acutely toxic; and/or 2 is severely irritant or corrosive to skin or eyes; and/or 3 is carcinogenic, mutagenic or reprotoxic; and/or 4 is a floater or persistent floater with associated health effects 1 C1 and/or C2 and/or C3 = 4; and/or 2 D1 or D2 = 3, 3A, 3B, or 3C; and/or 3 D3 contains C, M or R; and/or 4 E2 = F or Fp and D3 contains Ss, Sr, T, A, N, or I Warning issued leading to the closure of amenities

GHS Security Information

Corrosive
Toxic

Danger

  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.