BUTYRALDEHYDE

UN Number: 1129 - CAS Number: 123-72-8

Also known as: BUTAL, BUTALDEHYDE, BUTANAL, BUTYL ALDEHYDE, BUTYRAL, 2-Butanone, 3-Butanone, Butanone, Ethyl Methyl Ketone, Mek, Methyl Acetone, Methyl-2-Propanone, Methylethyl Ketone, Methylethylketone, Butan-2-One, Methyl Ethyl Ketone

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List

Description

UN number	1129
CAS number	123-72-8
Formula	C₄H₈O

Physical chemical data

Physical State (20°C)

Liquid

Physical State (25°C)

Liquid

Density (kg/m3)

803 [Kg/m³] at a temperature of 20°C

Kinematic viscosity (cSt)

0.51 [cSt] at a temperature of 20°C

0.5 [cSt] at a temperature of 25°C

Molar mass (g/mol)

72.11

Density of gas (kg/m3)

3.225

Solubility (g/L)

263000 [g/L] at a temperature of 20°C and salinity of 0‰

136000 [g/L] at a temperature of 25°C and salinity of 0‰

Boiling Point (°C)

Melting Point (°C)

-97

Critical molar volume (m³/mol)

0.000267

Critical temperature (°C)

536.7

Critical pressure (Pa)

4207000

Surface tension (mN/m)

24.6 [mN/m] at a temperature of 20°C

23.97 [mN/m] at a temperature of 25°C

Vapour Pressure (Pa)

12300 [Pa] at a temperature of 20°C

12079 [Pa] at a temperature of 25°C

Ignition Temperature (°C)

230

Flash Point (°C)

-6

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

-2

Flash Point (Cleveland open cup) (°C)

Lower explosivity limit (LEL) (volume %)

2.47

Upper explosivity limit (UEL) (volume %)

10.6

Vapor enthalpy (J/Kg)

434059 [J/Kg] at a temperature of 79.6°C

482457 [J/Kg] at a temperature of 25°C

Combus enthalpy (J/Kg)

32700000

Specific heat capacity (J/(Kg·K))

2200.8

Combustion efficiency (%)

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

0.07

Rad fraction (%)

Henry's constant (mol/(m³·Pa))

5.83

Behaviour at sea

Log kow	0.29
Log koc	0.55
Aqueous photolysis (Half-life)	Not photolysable
Biodegradation in estuary environment (Half-life) (days)	Not hydrolysable
Biodegradation in marine environment (Half-life) (days)	10
Bioconcentration factor (BCF)	0.98

Additional data

Colour

colourless

Odour

pungent odour

MARPOL pollution category

Category	Description
Z	Noxious Liquid Substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a minor hazard to either marine resources or human health and therefore justify less stringent restrictions on the quality and quantity of the discharge into the marine environment.

Standard behavior classification

Transportation data

Transport mode	Bulk,Packaged
Package group	II
Cargo group	19
State	liquid
Temperature (°C)	ambient
Pressure (Pa)	under pressure
Family name	aldehydes
IMO class	3.2

Reactivity data

Water	No
Acid(s)	Yes
Base(s)	Yes
Metal(s) and alloys	No
Oxidizing agents	Yes
Reducing agents	No
Combustibles	No
Organic substance	No

GESAMP Hazard profile

Bioaccumulation in logPow (A1A)	1 - ≥1 and <2
Bioaccumulation (A1)	1 - Very low potential to bioaccumulate
Biodegradation (A2)	R - Readily biodegradable
Acute aquatic toxicity (B1) (LC/EC/IC50 (mg/l))	2 - Slightly toxic
Chronic aquatic toxicity (B2) (NOEC (mg/l))	0 - Negligible
Acute mammalian toxicity by swallowing (C1) (LD50 (mg/kg))	0 - Negligible
Acute mammalian toxicity by skin penetration (C2) (LD50 (mg/kg))	1 - Slight
Acute mammalian toxicity by inhalation (C3) (LC50 (mg/l))	0 - Negligible
Skin irritation/corrosivity (D1)	3 - Corrosive
Eye irritation/corrosivity (D2)	3 - Severely irritating, with irreversible corneal injury
Interference with coastal amenities (E2)	DE - Dissolver/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

300

Hazard statements

Physical

H225	Highly flammable liquid and vapour.

Health

H319	Causes serious eye irritation.
H336	May cause drowsiness or dizziness.

Precautionary statements

General

P102	Keep out of reach of children.

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.
P264	Wash ... thoroughly after handling.
P271	Use only outdoors or in a well-ventilated area.
P280	Wear protective gloves/protective clothing/eye protection/face protection.

Response

P303 + P361 + P353	IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower.
P305 + P351 + P338	IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P312	Call a POISON CENTER or doctor/physician if you feel unwell.
P337 + P313	If eye irritation persists: Get medical advice/attention.
P370 + P378	In case of fire: Use ... for extinction.

Storage

P403 + P233	Store in a well-ventilated place. Keep container tightly closed.
P405	Store locked up.

Disposal

P501	Dispose of contents/container to ...

TEEL-1 (mg/m3)

0.06 ppm

TEEL-2 (mg/m3)

0.4 ppm

TEEL-3 (mg/m3)

12.5 ppm

Ecotoxicity

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

1382

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

1656

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

1170

Assessment factor (AF)

1 on the Short term

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

55.8 [µg/l] on the Short term

Incident reports

No incident reports available

Emergency Response Guidebook

Guide number: 129P

See the guide or download the emergency response guidebook

At sea emergency guide

Emergency schedule: 2-07

LIQUEFIED GASES, FLAMMABLE.

Emergency procedures

Action

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

Spillage on deck

Stop leak if practicable. Let spilt liquid evaporate.

Spillage under deck

Provide adequate ventilation. Stop leak if practicable. Let spilt liquid evaporate.

Fire on deck

Use water spray, foam or dry chemical from as far away as practicable.
Keep adjacent receptacles cool with copious quantities of water. Remove undamaged cooled receptacles to a safe place.

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.
Self-contained breathing apparatus.
Spray nozzles.

Remarks by UN no.

ACETYLENE, DISSOLVED (UN No. 1001)
Care! Heated receptacles should be jettisoned as possible explosion hazard.

Decision trees

Flammable

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No decision trees available

No additional data