OCTANE

UN Number: 1262 - CAS Number: 111-65-9

Also known as: N-Octane, Octane

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List

Description

UN number	1262
CAS number	111-65-9
Formula	C₈H₁₈

Physical chemical data

Physical State (20°C)

Liquid

Physical State (25°C)

Liquid

Density (kg/m3)

703 [Kg/m³] at a temperature of 20°C

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

Molar mass (g/mol)

114.2

Density of gas (kg/m3)

5.792

Solubility (g/L)

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

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

Boiling Point (°C)

125.9

Melting Point (°C)

-16

Critical molar volume (m³/mol)

0.000492

Critical temperature (°C)

568.7

Critical pressure (Pa)

2490000

Surface tension (mN/m)

21.62 [mN/m] at a temperature of 20°C

21.14 [mN/m] at a temperature of 25°C

Vapour Pressure (Pa)

1306 [Pa] at a temperature of 20°C

Ignition Temperature (°C)

210

Flash Point (°C)

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

Flash Point (Cleveland open cup) (°C)

Lower explosivity limit (LEL) (volume %)

Upper explosivity limit (UEL) (volume %)

6.5

Vapor enthalpy (J/Kg)

301237 [J/Kg] at a temperature of 126°C

363310 [J/Kg] at a temperature of 25°C

Combus enthalpy (J/Kg)

47715549

Specific heat capacity (J/(Kg·K))

2229

Henry's constant (mol/(m³·Pa))

324240

Behaviour at sea

Log kow	5.18
Log koc	2.64
Aqueous photolysis (Half-life)	Not photolysable
Biodegradation in estuary environment (Half-life) (days)	Not hydrolysable
Bioconcentration factor (BCF)	1200

Additional data

Colour

colourless

Odour

gasoline odour

MARPOL pollution category

Category	Description
X	Noxious Liquid Substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a major hazard to either marine resources or human health and, therefore, justify the prohibition of the discharge into the marine environment.

Standard behavior classification

Transportation data

Package group	II
Cargo group	31
State	liquid
Temperature (°C)	ambient
Pressure (Pa)	ambient
Family name	paraffins
IMO class	3.2

Reactivity data

Water	No
Static electricity	Yes

GESAMP Hazard profile

Bioaccumulation in logPow (A1A)	5 - ≥5 and ≤ ca.7
Bioaccumulation (A1)	5 - Very high potential to bioaccumulate
Biodegradation (A2)	R - Readily biodegradable
Acute aquatic toxicity (B1) (LC/EC/IC50 (mg/l))	4 - Highly 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))	0 - Negligible
Skin irritation/corrosivity (D1)	0 - Not irritating
Eye irritation/corrosivity (D2)	0 - Not irritating
Specific Health Concern (D3)	A - Aspiration
Interference with coastal amenities (E2)	FE - Floater/Evaporator
Effects on wildlife and bottom habitats (E3)	2 - Is a persistent floater; and/or is moderately acutely toxic; and/or is irritating to skin and/or eyes; and/or has long-term health effects other than carcinogenicity, mutagenicity or reprotoxicity; and/or is highly flammable; and/or is flammable and is a floater with evaporative properties

Human toxicity threshold

IDHL

5000

Hazard statements

Physical

H225	Highly flammable liquid and vapour.

Health

H304	May be fatal if swallowed and enters airways.
H315	Causes skin irritation.
H336	May cause drowsiness or dizziness.

Environmental

H410	Very toxic to aquatic life with long lasting effects.

Precautionary statements

Prevention

P210	Keep away from heat/sparks/open flames/hot surfaces. No smoking.
P241	Use explosion-proof electrical/ventilating/lighting/.../equipment.

Response

P301 + P310	IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P303 + P361 + P353	IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower.

Storage

P405	Store locked up.

Disposal

P501	Dispose of contents/container to ...

TLV-TWA

300

TEEL-1 (mg/m3)

300 ppm

TEEL-2 (mg/m3)

385 ppm

TEEL-3 (mg/m3)

1000 ppm

Ecotoxicity

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

0.38

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

0.17

Assessment factor (AF)

1 on the Short term

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

10 [µg/l] on the Short term

Incident reports

No incident reports available

Emergency Response Guidebook

Guide number: 128

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

Flammable

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No decision trees available

No additional data