n-PENTANE

UN Number: 1265 - CAS Number: 109-66-0

Also known as: N-Pentane, Pentane
Information on chemical

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List

Description

UN number 1265
CAS number 109-66-0
Formula C5H12

Physical chemical data

Physical State (20°C) Liquid
Physical State (25°C) Liquid
Density (kg/m3)
626 [Kg/m³] at a temperature of 20°C
642.9 [Kg/m³] at a temperature of 5°C
638.4 [Kg/m³] at a temperature of 10°C
627.8 [Kg/m³] at a temperature of 20°C
Kinematic viscosity (cSt)
0.35771 [cSt] at a temperature of 25°C
13377 [cSt] at a temperature of 5°C
1.3315 [cSt] at a temperature of 10°C
0.98758 [cSt] at a temperature of 20°C
Molar mass (g/mol) 72.15
Density of gas (kg/m3) 3.211
Solubility (g/L)
38 [g/L] at a temperature of 25°C and salinity of 0‰
28 [g/L] at a temperature of 25°C and salinity of 35‰
37 [g/L] at a temperature of 20°C and salinity of 0‰
38 [g/L] at a temperature of 20°C and salinity of 5‰
27 [g/L] at a temperature of 20°C and salinity of 30‰
Boiling Point (°C) 36.3
Melting Point (°C) -130
Critical molar volume (m³/mol) 0.000311
Critical temperature (°C) 469.7
Critical pressure (Pa) 3370000
Surface tension (mN/m)
16 [mN/m] at a temperature of 20°C
15.49 [mN/m] at a temperature of 25°C
17.55 [mN/m] at a temperature of 5.1°C
16.77 [mN/m] at a temperature of 10.2°C
16.43 [mN/m] at a temperature of 16.43°C
Vapour Pressure (Pa)
533320 [Pa] at a temperature of 20°C
Ignition Temperature (°C) 285
Flash Point (°C) -20
Flash Point (Pensky-Martens closed cup) (°C) -49
Lower explosivity limit (LEL) (volume %) 1.4
Upper explosivity limit (UEL) (volume %) 8.5
Vapor enthalpy (J/Kg)
357455 [J/Kg] at a temperature of 30.06°C
366190 [J/Kg] at a temperature of 25°C
Combus enthalpy (J/Kg) 48635463
Specific heat capacity (J/(Kg·K)) 2317
Henry's constant (mol/(m³·Pa)) 12800

Behaviour at sea

Log kow 3.64
Log koc 1.86
Aqueous photolysis (Half-life) Not photolysable
Biodegradation in estuary environment (Half-life) (days) Not hydrolysable
Bioconcentration factor (BCF) 80

Additional data

Colour colourless
Odour gasoline 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.

Transportation data

Transport mode Bulk,Packaged
Package group II
Cargo group 31
State liquid
Temperature (°C) ambient
Pressure (Pa) ambient
Family name paraffins
IMO class 3.1

Reactivity data

Water No
Static electricity Yes

GESAMP Hazard profile

Bioaccumulation in logPow (A1A) 3 - ≥3 and <4
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)) 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) 2 - Irritating
Eye irritation/corrosivity (D2) 1 - Mildly irritating
Interference with coastal amenities (E2) E - 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

Environmental Hazard Flammable Harmful Health Hazard
IDHL 15000
Hazard statements
Physical
H224 Extremely flammable liquid and vapour.
Health
H304 May be fatal if swallowed and enters airways.
H336 May cause drowsiness or dizziness.
Environmental
H411 Toxic to aquatic life with long lasting effects.
Precautionary statements
Prevention
P210 Keep away from heat/sparks/open flames/hot surfaces. No smoking.
P233 Keep container tightly closed.
P240 Ground/bond container and receiving equipment.
P241 Use explosion-proof electrical/ventilating/lighting/.../equipment.
P242 Use only non-sparking tools.
P243 Take precautionary measures against static discharge.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P271 Use only outdoors or in a well-ventilated area.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
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.
P304 + P340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P312 Call a POISON CENTER or doctor/physician if you feel unwell.
P331 Do NOT induce vomiting.
P370 + P378 In case of fire: Use ... for extinction.
P391 Collect spillage.
Storage
P403 + P233 Store in a well-ventilated place. Keep container tightly closed.
P403 + P235 Store in a well-ventilated place. Keep cool.
P405 Store locked up.
Disposal
P501 Dispose of contents/container to ...
TLV-TWA 600
TEEL-1 (mg/m3) 610 ppm
TEEL-2 (mg/m3) 610 ppm
TEEL-3 (mg/m3) 1500 ppm

Ecotoxicity

Lowest median lethal concentration (LC50) on crustacean (mg/l) 1.19
Highest no observed effect concentration (NOEC) on algae (mg/l) 4.549
Assessment factor (AF)
100 on the Short term
Predicted No Effect Concentration (PNEC) (µg/l)
27 [µg/l] on the Short term
Incident reports

Incident reports

No incident reports available

Emergency Response Guidebook

Emergency Response Guidebook

Guide number: 128

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 2020-12-14T09:02:49+00:00