STYRENE MONOMER inhibited

UN Number: 2055 - CAS Number: 100-42-5

Also known as: CINNAMENE, CINNAMENOL, DIAREX HF 77, Ethenylbenzene, Phenylethene, Phenethylene, Phenylethylene, Styrene Monomer, Styrol, Styrolene, Vinylbenzene, Vinylbenzol, Vinyl Benzene, Styrene
Information on chemical

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List

Description

UN number 2055
CAS number 100-42-5
Formula C8H8

Physical chemical data

Physical State (20°C) Liquid
Physical State (25°C) Liquid
Density (kg/m3)
906 [Kg/m³] at a temperature of 20°C
Kinematic viscosity (cSt)
0.83 [cSt] at a temperature of 20°C
0.75 [cSt] at a temperature of 25°C
Molar mass (g/mol) 104.15
Density of gas (kg/m3) 4.631
Solubility (g/L)
300 [g/L] at a temperature of 20°C and salinity of 0‰
310 [g/L] at a temperature of 25°C and salinity of 0‰
Boiling Point (°C) 145.4
Melting Point (°C) -31
Surface tension (mN/m)
32.14 [mN/m] at a temperature of 20°C
Interfacial tension (mN/m)
35.48 [mN/m] at a temperature of 20°C and salinity of 0‰
Vapour Pressure (Pa)
600 [Pa] at a temperature of 20°C
810 [Pa] at a temperature of 25°C
Ignition Temperature (°C) 490
Flash Point (°C) 32
Flash Point (Pensky-Martens closed cup) (°C) 31
Flash Point (Cleveland open cup) (°C) 34.4
Lower explosivity limit (LEL) (volume %) 1.1
Upper explosivity limit (UEL) (volume %) 6.1
Vapor enthalpy (J/Kg)
371579 [J/Kg] at a temperature of 145.2°C
Combus enthalpy (J/Kg) 40500000
Specific heat capacity (J/(Kg·K)) 1747.5
Combustion efficiency (%) 70
Mass flow rate of the combustion surface (Kg/(m²·s)) 0.07
Rad fraction (%) 60
Henry's constant (mol/(m³·Pa)) 278

Behaviour at sea

Log kow 3.02
Log koc 2.96
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) 74

Additional data

Colour colourless to light yellow
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.
Standard behavior classification FE

Transportation data

Transport mode Bulk,Packaged
Package group III
Cargo group 30
State liquid
Temperature (°C) ambient
Pressure (Pa) ambient
Family name olefins
IMO class 3.3

Reactivity data

Water No
Acid(s) Yes
Base(s) No
Metal(s) and alloys No
Static electricity Yes
Oxidizing agents Yes
Reducing agents No
Combustibles No
Organic substance Yes
Notable risks Polymerization.

GESAMP Hazard profile

Bioaccumulation in logPow (A1A) 3 - ≥3 and <4
Bioaccumulation in BCF (A1B) 2 - ≥10 and <100
Bioaccumulation (A1) 3 - Moderate potential to bioaccumulate
Biodegradation (A2) R - Readily biodegradable
Acute aquatic toxicity (B1) (LC/EC/IC50 (mg/l)) 3 - Moderately toxic
Acute mammalian toxicity by swallowing (C1) (LD50 (mg/kg)) 1 - Slight
Acute mammalian toxicity by skin penetration (C2) (LD50 (mg/kg)) 0 - Negligible
Acute mammalian toxicity by inhalation (C3) (LC50 (mg/l)) 2 - Moderate
Skin irritation/corrosivity (D1) 2 - Irritating
Eye irritation/corrosivity (D2) 2 - Irritating
Interference with coastal amenities (E2) FE - Floater/Evaporator
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

Environmental Hazard Harmful
IDHL 5000
Hazard statements
Health
H317 May cause an allergic skin reaction.
Environmental
H400 Very toxic to aquatic life.
H410 Very toxic to aquatic life with long lasting effects.
Precautionary statements
Prevention
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P272 Contaminated work clothing should not be allowed out of the workplace.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
Response
P321 Specific treatment (see ... on this label).
P333 + P313 If skin irritation or rash occurs: Get medical advice/attention.
P363 Wash contaminated clothing before reuse.
P391 Collect spillage.
Disposal
P501 Dispose of contents/container to ...
TLV-TWA 50
ERPG-1 (ppm) 50
ERPG-2 (ppm) 250
ERPG-3 (ppm) 1000

Ecotoxicity

Lowest median lethal concentration (LC50) on algae (mg/l) 4.9
Lowest median lethal concentration (LC50) on crustacean (mg/l) 4.7
Lowest median lethal concentration (LC50) on fishes (mg/l) 4.02
Highest no observed effect concentration (NOEC) on crustacean (mg/l) 1.01
Assessment factor (AF)
100 on the Short term
1000 on the Long term
Predicted No Effect Concentration (PNEC) (µg/l)
40.2 [µg/l] on the Short term
4.02 [µg/l] on the Long term
Incident reports

Incident reports

Year Vessel Location Cargo type
1992 Styrene Barge Wax Lake Spillway, Louisiana, USA Bulk
1995 Chung Mu Port of Zhanjiang, China Bulk
2000 Ievoli Sun Off the Channel Island of Alderney, UK Bulk
Emergency Response Guidebook

Emergency Response Guidebook

Guide number: 128P

See the guide or download the emergency response guidebook

At sea emergency guide

At sea emergency guide

Emergency schedule: 3-07

• 1 CLASS 3.1
FLAMMABLE LIQUIDS, FLASHPOINT BELOW -18°C Closed Cup; NOT COVERED BY OTHER SCHEDULES; IMMISCIBLE WITH WATER.
• 2 CLASS 3.2
FLAMMABLE LIQUIDS, FLASHPOINT BETWEEN -18°C AND 23°C Closed Cup; NOT COVERED BY OTHER SCHEDULES; IMMISCIBLE WITH WATER.
• 3 CLASS 3.3
FLAMMABLE LIQUIDS, FLASHPOINT BETWEEN 23°C AND 61°C Closed Cup; NOT COVERED BY OTHER SCHEDULES; IMMISCIBLE WITH WATER.

Emergency procedures

Action

Avoid all sources of ignition (e.g. naked lights, unprotected light bulbs, electric handtools).

Spillage on deck

Wash spillage overboard with copious quantities of water.

Spillage under deck

Provide adequate ventilation. Collect spillage, where practicable, using absorbent material, for safe disposal.

Fire on deck

Use water spray, foam or dry chemical. Do NOT use water jet. If possible remove receptacles likely to be involved or keep them cool with copious quantities of water.

Fire under deck

Batten down; use ship's fixed fire-fighting installation. Otherwise adopt action as for "On deck".

Special equipment to be carried

Protective gloves and boots.
Self-contained breathing apparatus.
Spray nozzles.

Remarks by UN no.

• 2-ETHYLBUTYL ACETATE (UN No. 1177)
Self-contained breathing apparatus not necessary - use goggles for eye protection.

• ISOPROPYL NITRATE (UN No. 1222)
In fire, explosion hazard.

• PINE OIL (UN No. 1272)
Self-contained breathing apparatus not necessary - use goggles for eye protection.

• ZIRCONIUM SUSPENDED IN A FLAMMABLE LIQUID (UN No. 1308)
Spillage is liable to self-ignition. Use water spray from as many hoses as possible from as far away as practicable.

• normal-PROPYL NITRATE (UN No. 1865)
In fire, explosion hazard.

• CYCLOPENTANOL (UN No. 2244)
• normal-UNDECANE (UN No. 2330)
Self-contained breathing apparatus not necessary - use goggles for eye protection.

• 3-BROMOPROPYNE (UN No. 2345)
In fire, explosion hazard. Fight fire from a protected position.

• TETRAMETHYLSILANE (UN No. 2749)
Possible self-ignition at ambient temperatures.

• ELEVATED TEMPERATURE LIQUID, FLAMMABLE, N.O.S. (UN No. 3256), with
flashpoint above 61°C c.c., at or above its flashpoint .
Spilled liquid may be very hot and remain above its flashpoint for some time after spillage.

Decision trees

Decision trees

No decision trees available

No additional data

last modified 2020-12-14T09:02:57+00:00