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NIOSH

2,4-PENTADIONE

ICSC: 0533

Acetyl 2-propanone
Acetoacetone
Acetyl acetone
Pentane-2,4-dione
C5H8O2 / CH3COCH2COCH3
Molecular mass: 100.13
ICSC # 0533 		CAS # 123-54-6
RTECS # SA1925000
UN # 2310
EC # 606-029-00-0
August 04, 1997 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Flammable.
NO open flames, NO sparks, and NO smoking.
Powder , foam carbon dioxide .
EXPLOSION Above 34°C explosive vapour/air mixtures may be formed.
Above 34°C use a closed system, ventilation, and explosion-proof electrical equipment.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
STRICT HYGIENE!

•INHALATION Ataxia. Dizziness. Drowsiness. Headache. Laboured breathing. Nausea. Vomiting.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Artificial respiration if indicated. Refer for medical attention.
•SKIN MAY BE ABSORBED! Redness.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
•EYES Redness. Pain.
Safety goggles, face shield.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION Diarrhoea. Weakness. (further see Inhalation).
Do not eat, drink, or smoke during work.
Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Ventilation. Collect leaking and spilled liquid in sealable containers as far as possible. Wash away remainder with plenty of water. Do NOT let this chemical enter the environment (extra personal protection: filter respirator for organic gases and vapours).
Fireproof. Separated from strong oxidants. Keep in the dark.

Xn symbol
R: 10-22
S: 2-21-23-24/25
UN Hazard Class: 3
UN Subsidiary Risks: 6.1
UN Packing Group: III
ICSC: 0533 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

2,4-PENTADIONE

ICSC: 0533

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PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID , WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:
The vapour is heavier than air.

CHEMICAL DANGERS:
The substance may polymerize under the influence of light. Reacts with strong oxidants, bases and reducing agents.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK: 20 ppm, 83 mg/m3, skin absorption (H);
Peak limitation category: II(2) Pregnancy risk group: C
(DFG 2006).


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour, through the skin and by ingestion.

INHALATION RISK:
No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the nervous system , resulting in tissue lesions.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the thymus, lungs, central nervous system and nasal passage.

PHYSICAL
PROPERTIES

Boiling point: 140°C
Melting point: -23°C
Relative density (water = 1): 0.98
Solubility in water, g/100 ml: 16
Vapour pressure, kPa at 20°C: 0.93
Relative vapour density (air = 1): 3.45
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.02
Flash point: 34°C c.c.
Auto-ignition temperature: 340°C
Explosive limits, vol% in air: 2.4-11.6

ENVIRONMENTAL
DATA

The substance is harmful to aquatic organisms.

N O T E S

NFPA Code: H2; F2; R0;
Card has been partially updated in August 2007: see Fire fighting, Occupational Exposure Limits.

ADDITIONAL INFORMATION



ICSC: 0533 2,4-PENTADIONE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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