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

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List


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) 49
Flash Point (Pensky-Martens closed cup) (°C) 49
Flash Point (Cleveland open cup) (°C) 54
Lower explosivity limit (LEL) (volume %) 2.7
Upper explosivity limit (UEL) (volume %) 10
Combus enthalpy (J/Kg) 16400000
Specific heat capacity (J/(Kg·K)) 1648
Combustion efficiency (%) 98
Mass flow rate of the combustion surface (Kg/(m²·s)) 0.03
Rad fraction (%) 23
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

Corrosive Flammable Flammable liquid Harmful
IDHL 1000
Hazard statements
H226 Flammable liquid and vapour.
H302 Harmful if swallowed.
H314 Causes severe skin burns and eye damage.
H332 Harmful if inhaled.
Precautionary statements
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.
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.
P403 + P233 Store in a well-ventilated place. Keep container tightly closed.
P405 Store locked up.
P501 Dispose of contents/container to ...
ERPG-1 (ppm) 0.5
ERPG-2 (ppm) 15
ERPG-3 (ppm) 100


Lowest median lethal concentration (LC50) on algae (mg/l) 9
Lowest median lethal concentration (LC50) on crustacean (mg/l) 55
Lowest median lethal concentration (LC50) on fishes (mg/l) 265
Highest no observed effect concentration (NOEC) on algae (mg/l) 9
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

Incident reports

No incident reports available

Emergency Response Guidebook

Emergency Response Guidebook

Guide number: 137

See the guide or download the emergency response guidebook

At sea emergency guide

At sea emergency guide

Emergency schedule: 8-04


Emergency procedures


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

Decision trees

No decision trees available

No additional data

last modified 2023-01-23T10:14:37+00:00

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