METHACRYLIC ACID inhibited

UN Number: 2531 - CAS Number: 79-41-4

Also known as: ACIDE METHACRYLIQUE stabilisé, 2-Methacrylic Acid, 2-Methyl-2-Propenoic Acid, Methacrylic Acid, Acide Methacrylique

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List

Description

UN number	2531
CAS number	79-41-4
Formula	C₄H₆O₂

Physical chemical data

Physical State (20°C)

Liquid

Physical State (25°C)

Solid

Density (kg/m3)

1010 [Kg/m³] at a temperature of 20°C

Kinematic viscosity (cSt)

1.28 [cSt] at a temperature of 20°C

Molar mass (g/mol)

86.1

Density of gas (kg/m3)

3.87

Solubility (g/L)

89000 [g/L] at a temperature of 20°C and salinity of 0‰

89000 [g/L] at a temperature of 25°C and salinity of 0‰

Boiling Point (°C)

161

Melting Point (°C)

Surface tension (mN/m)

65.9 [mN/m] at a temperature of 20°C

Vapour Pressure (Pa)

90 [Pa] at a temperature of 20°C

133 [Pa] at a temperature of 25°C

Ignition Temperature (°C)

400

Flash Point (°C)

Flash Point (Cleveland open cup) (°C)

Lower explosivity limit (LEL) (volume %)

2.4

Upper explosivity limit (UEL) (volume %)

8.8

Specific heat capacity (J/(Kg·K))

1871

Henry's constant (mol/(m³·Pa))

0.039

Behaviour at sea

Log kow	0.93
Log koc	0.35
Aqueous photolysis (Half-life)	Not photolysable
Biodegradation in estuary environment (Half-life) (days)	Not hydrolysable
Bioconcentration factor (BCF)	3.1

Additional data

Colour

colourless

Odour

sharp, acrid, repulsive

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

Transport mode	Bulk,Packaged
Package group	III
Temperature (°C)	ambient
Family name	organic acids

Reactivity data

Water	No
Acid(s)	Yes
Base(s)	Yes
Oxidizing agents	Yes
Organic substance	Yes

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))	2 - Slightly toxic
Chronic aquatic toxicity (B2) (NOEC (mg/l))	0 - Negligible
Acute mammalian toxicity by swallowing (C1) (LD50 (mg/kg))	1 - Slight
Acute mammalian toxicity by skin penetration (C2) (LD50 (mg/kg))	2 - Moderate
Acute mammalian toxicity by inhalation (C3) (LC50 (mg/l))	2 - Moderate
Skin irritation/corrosivity (D1)	1 - Mildly irritating
Eye irritation/corrosivity (D2)	3 - Severely irritating, with irreversible corneal injury
Interference with coastal amenities (E2)	D - Dissolver
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

Hazard 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 ...

TLV-TWA

TEEL-1 (mg/m3)

6.7 ppm

TEEL-2 (mg/m3)

61 ppm

TEEL-3 (mg/m3)

220 ppm

Ecotoxicity

Lowest median lethal concentration (LC50) on algae (mg/l)

Lowest median lethal concentration (LC50) on crustacean (mg/l)

140

Lowest median lethal concentration (LC50) on fishes (mg/l)

Highest no observed effect concentration (NOEC) on algae (mg/l)

8.2

Highest no observed effect concentration (NOEC) on crustacean (mg/l)

Highest no observed effect concentration (NOEC) on fishes (mg/l)

Assessment factor (AF)

50 on the Short term

Predicted No Effect Concentration (PNEC) (µg/l)

164 [µg/l] on the Short term

Incident reports

No incident reports available

Emergency Response Guidebook

Guide number: 153P

See the guide or download the emergency response guidebook

At sea emergency guide

No guides available

Decision trees

Corrosive Toxic

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graph TB;5a225335574f4bb484e98878cf167847("Corrosive substances");click 5a225335574f4bb484e98878cf167847 window.callbackNodeClikFunction "Corrosive substances";

No decision trees available

No additional data