ACETIC ANHYDRIDE

UN Number: 1715 - CAS Number: 108-24-7

Also known as: ACETIC ACID ANHYDRIDE, ACETIC OXIDE, ACETYL, ACETYL ANHYDRIDE, ACETYL ETHER, ACETYL OXIDE, ANHYDRIDE ACETIQUE, AZINZUUR ANHYDRIDE, Acetanhydride, Ethanoic Anhydrate, Ethanoic Anhydride, Ethanoic Acid Anhydride, Acetic Anhydride, Anhydryde Acetique

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List

Description

UN number	1715
CAS number	108-24-7
Formula	C₄H₆O₃

Physical chemical data

Physical State (20°C)

Liquid

Physical State (25°C)

Liquid

Density (kg/m3)

1080 [Kg/m³] at a temperature of 20°C

Kinematic viscosity (cSt)

0.84 [cSt] at a temperature of 20°C

0.78 [cSt] at a temperature of 25°C

Molar mass (g/mol)

102.09

Density of gas (kg/m3)

4.541

Solubility (g/L)

113500 [g/L] at a temperature of 20°C and salinity of 0‰

262000 [g/L] at a temperature of 25°C and salinity of 0‰

Boiling Point (°C)

139

Melting Point (°C)

-73

Critical temperature (°C)

606

Critical pressure (Pa)

4000000

Surface tension (mN/m)

32.7 [mN/m] at a temperature of 20°C

31.93 [mN/m] at a temperature of 25°C

Vapour Pressure (Pa)

533 [Pa] at a temperature of 20°C

680 [Pa] at a temperature of 25°C

Ignition Temperature (°C)

330

Flash Point (°C)

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

Flash Point (Cleveland open cup) (°C)

Lower explosivity limit (LEL) (volume %)

2.7

Upper explosivity limit (UEL) (volume %)

Combus enthalpy (J/Kg)

16400000

Specific heat capacity (J/(Kg·K))

1648

Combustion efficiency (%)

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

0.03

Rad fraction (%)

Henry's constant (mol/(m³·Pa))

0.57

Behaviour at sea

Log kow	-0.58
Log koc	1.11
Biodegradation in estuary environment (Half-life) (days)	1
Biodegradation in marine environment (Half-life) (days)	10
Bioconcentration factor (BCF)	1

Additional data

Colour

colourless

Odour

strong vinegar 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.

Transportation data

Transport mode	Bulk,Packaged
Package group	II
Cargo group	11
State	liquid
Temperature (°C)	ambient
Pressure (Pa)	under pressure
Family name	organic anhydrides

Reactivity data

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

GESAMP Hazard profile

Bioaccumulation in logPow (A1A)	0 - e <1, or > ca.7, or Mol. Wt. > 1000
Bioaccumulation in BCF (A1B)	0 - No measurable BCF
Bioaccumulation (A1)	0 - No potential to bioaccumulate
Biodegradation (A2)	R - Readily biodegradable
Acute aquatic toxicity (B1) (LC/EC/IC50 (mg/l))	1 - Practically non-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)	3 - Corrosive
Eye irritation/corrosivity (D2)	3 - Severely irritating, with irreversible corneal injury
Specific Health Concern (D3)	A - Aspiration
Interference with coastal amenities (E2)	D - Dissolver
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

1000

Hazard statements

Physical

H226	Flammable liquid and vapour.

Health

H302	Harmful if swallowed.
H314	Causes severe skin burns and eye damage.
H332	Harmful if inhaled.

Precautionary statements

Prevention

P210	Keep away from heat/sparks/open flames/hot surfaces. No smoking.
P233	Keep container tightly closed.
P235	Keep cool.
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.
P260	Do not breathe dust/fume/gas/mist/vapours/spray.
P261	Avoid breathing dust/fume/gas/mist/vapours/spray.
P264	Wash ... thoroughly after handling.
P270	Do no eat, drink or smoke when using this product.
P271	Use only outdoors or in a well-ventilated area.
P284	Wear respiratory protection.

Response

P301 + P312	IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell.
P303	IF ON SKIN (or hair):
P304 + P340	IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P310	Immediately call a POISON CENTER or doctor/physician.
P320	Specific treatment is urgent (see ... on this label).
P330	Rinse mouth.
P370	In case of fire:
P378	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 ...

ERPG-1 (ppm)

0.5

ERPG-2 (ppm)

ERPG-3 (ppm)

100

Ecotoxicity

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

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

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

265

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

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

31.4

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

34.3

Assessment factor (AF)

1000 on the Short term

1000 on the Long term

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

9 [µg/l] on the Short term

9 [µg/l] on the Long term

Incident reports

No incident reports available

Emergency Response Guidebook

Guide number: 137

See the guide or download the emergency response guidebook

At sea emergency guide

Emergency schedule: 8-04

CORROSIVE SUBSTANCES, FLAMMABLE, FLASHPOINT 61°C Closed Cup OR BELOW.

Emergency procedures

Action

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

Spillage on deck

Wash overboard with copious quantities of water.

Spillage under deck

Collect spillage, where practicable, using absorbent material for liquids, for safe disposal.

Fire on deck

Use water spray.

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.
Spray nozzles.

Decision trees

Corrosive Flammable Flammable liquid

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No decision trees available

No additional data