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

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)

Flash Point (Pensky-Martens closed cup) (°C)

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 (%)

Mass flow rate of the combustion surface (Kg/(m²·s))

0.07

Rad fraction (%)

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

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

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

ERPG-1 (ppm)

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

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

Guide number: 128P

See the guide or download the emergency response guidebook

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

No decision trees available

No additional data