TOLUENE DIISOCYANATE

UN Number: 2078 - CAS Number: 584-84-9

Also known as: DIISOCYANATE DE TOLUENE, Toluene-2,4-Diisocyanate, 2,4-Diisocyanate-1-Methylbenzene, Toluene Diisocyanate

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List

Description

UN number	2078
CAS number	584-84-9
Formula	C₉H₆N₂O₂

Physical chemical data

Physical State (20°C)

Liquid

Physical State (25°C)

Liquid

Density (kg/m3)

1220 [Kg/m³] at a temperature of 20°C

1224.4 [Kg/m³] at a temperature of 25°C

Molar mass (g/mol)

174.16

Density of gas (kg/m3)

7.74

Solubility (g/L)

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

Boiling Point (°C)

250

Melting Point (°C)

Surface tension (mN/m)

25 [mN/m] at a temperature of 25°C

Vapour Pressure (Pa)

3998 [Pa] at a temperature of 20°C

3 [Pa] at a temperature of 25°C

Ignition Temperature (°C)

620

Flash Point (°C)

135

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

127

Flash Point (Cleveland open cup) (°C)

132

Lower explosivity limit (LEL) (volume %)

0.9

Upper explosivity limit (UEL) (volume %)

9.5

Combus enthalpy (J/Kg)

23900000

Specific heat capacity (J/(Kg·K))

1653

Henry's constant (mol/(m³·Pa))

1.11

Behaviour at sea

Persistence (days)	2.7
Log kow	3.74
Log koc	3.87
Aqueous photolysis (Half-life)	Not photolysable
Biodegradation in estuary environment (Half-life) (days)	1

Additional data

Colour

colourless to light yellow

Odour

pleasant odour

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

D, SD

Transportation data

Transport mode	Bulk,Packaged
Package group	II
Cargo group	12
State	liquid
Temperature (°C)	24� - 38�
Pressure (Pa)	under pressure
Family name	isocyanates
IMO class	6.1

Reactivity data

Water	Yes
Abilities	Reacts with water.
Acid(s)	Yes
Base(s)	Yes
Metal(s) and alloys	No
Oxidizing agents	Yes
Reducing agents	No
Combustibles	No
Organic substance	Yes

GESAMP Hazard profile

Bioaccumulation in logPow (A1A)	3 - ≥3 and <4
Bioaccumulation in BCF (A1B)	1 - ≥1 and <10
Bioaccumulation (A1)	1 - Very low potential to bioaccumulate
Biodegradation (A2)	NR - Not readily biodegradable
Acute aquatic toxicity (B1) (LC/EC/IC50 (mg/l))	2 - Slightly toxic
Acute mammalian toxicity by swallowing (C1) (LD50 (mg/kg))	0 - Negligible
Acute mammalian toxicity by skin penetration (C2) (LD50 (mg/kg))	0 - Negligible
Acute mammalian toxicity by inhalation (C3) (LC50 (mg/l))	4 - High
Skin irritation/corrosivity (D1)	3 - Corrosive
Eye irritation/corrosivity (D2)	3 - Severely irritating, with irreversible corneal injury
Interference with coastal amenities (E2)	S - Sinking substance that would deposit on the seabed, not likely to dissolve quickly
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

Hazard statements

Health

H315	Causes skin irritation.
H317	May cause an allergic skin reaction.
H319	Causes serious eye irritation.
H330	Fatal if inhaled.
H334	May cause allergy or asthma symptoms or breathing difficulties if inhaled.
H335	May cause respiratory irritation.
H351	Suspected of causing cancer.

Environmental

H412	Harmful to aquatic life with long lasting effects.

Precautionary statements

Prevention

P273	Avoid release to the environment.
P280	Wear protective gloves/protective clothing/eye protection/face protection.
P284	Wear respiratory protection.

Response

P308 + P313

IF exposed or concerned: Get medical advice/attention.

Storage

P403 + P233

Store in a well-ventilated place. Keep container tightly closed.

Disposal

P501	Dispose of contents/container to ...

TLV-TWA

0.005

TEEL-1 (mg/m3)

0.75 ppm

TEEL-2 (mg/m3)

2 ppm

TEEL-3 (mg/m3)

2 ppm

Ecotoxicity

Lowest median lethal concentration (LC50) on fishes (mg/l)	164
Highest no observed effect concentration (NOEC) on crustacean (mg/l)	1.1

Incident reports

Year	Vessel	Location	Cargo type
1987	Herald of Free Entreprise	Zeebrugge, Belgium	Package

Emergency Response Guidebook

Guide number: 156

See the guide or download the emergency response guidebook

At sea emergency guide

Emergency schedule: 6.1-02

TOXIC LIQUIDS, INCLUDING SUBSTANCES WHICH MAY LIQUEFY DURING TRANSPORT, NOT COVERED BY OTHER SCHEDULES.

Emergency procedures

Action

Turn ship off-wind.

Spillage on deck

Collect spillage, where practicable, using absorbent material for safe disposal. Wash remainder 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 copious quantities of water or other media to fight fire. 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 clothing (gloves, boots, coveralls, headgear).
Self-contained breathing apparatus.

Remarks by UN no.

METHYLBROMOACETONE
METHYL BROMIDE AND ETHYLENE DIBROMIDE MIXTURE, liquid (UN No. 1647)
TEAR GAS SUBSTANCE, LIQUID, N.O.S. (UN No. 1693)
Spillage may be gaseous.

CHLOROACETYL CHLORIDE (UN No. 1752)
Water-reactive; use water from as far away as practicable.

AMMUNITION, TEAR-PRODUCING, NON-EXPLOSIVE, with neither burster nor
expelling charge, non-fuzed.
METAL CARBONYLS, N.O.S. (UN No. 3281).
Spillage may be gaseous.

Decision trees

Toxic

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