4-Hydroxy-4-methylpentan-2-one
2-Pentanone, 4-hydroxy-4-methyl-
4-Hydroxy-2-keto-4-methylpentane
4-Hydroxy-4-methyl-2-pentanone
C6H12O2 / (CH3)2C(OH)CH2COCH3
Molecular mass: 116.2
ICSC # 0647
CAS # 123-42-2
RTECS # SA9100000
UN # 1148
EC # 603-016-00-1
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Flammable.
See Notes.
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NO open flames, NO sparks, and NO smoking.
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Water spray.
Alcohol-resistant foam.
Dry powder.
Carbon dioxide.
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Explosion
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Above 58°C explosive vapour/air mixtures may be formed.
(See Notes.)
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Above 58°C use a closed system, ventilation, and explosion-proof electrical equipment.
Use non-sparking handtools.
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In case of fire: keep drums, etc., cool by spraying with water.
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Exposure
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•Inhalation
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Cough.
Sore throat.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
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•Skin
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Redness.
Dry skin.
MAY BE ABSORBED!
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
Pain.
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Safety goggles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Do NOT induce vomiting.
Give one or two glasses of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Remove all ignition sources.
Personal protection:
filter respirator for organic gases and vapours.
Cover the spilled material with absorbent.
Carefully collect remainder.
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Fireproof.
Separated from
acids,
bases
,
amines
and
oxidants
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Xi symbol
R: 36
S: 2-24/25
UN Hazard Class: 3
UN Packing Group: III
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Important Data
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Physical State; Appearance:
COLOURLESS LIQUID
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating
or
on burning
or
on contact with
acids
,
bases
and
amines
producing acetone and mesityl alcohol.
Reacts
violently with
oxidants
forming flammable/explosive gas (hydrogen - see ICSC0001)
Occupational Exposure Limits:
TLV: 50 ppm as TWA; (ACGIH 2005).
MAK: 20 ppm, 96 mg/m3
Peak limitation category: I(2);
skin absorption (H);
Pregnancy risk group: D;
(DFG 2006).
OSHA PEL: TWA 50 ppm (240 mg/m3)
NIOSH REL: TWA 50 ppm (240 mg/m3)
NIOSH IDLH: 1800 ppm 10%LEL See: 123422
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its vapour,
through the skin
and
by ingestion.
Inhalation Risk:
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C.
Effects of Short-Term Exposure:
The substance
is irritating to
the eyes
,
the skin
and
the respiratory tract
.
If this liquid is swallowed, aspiration into the lungs may result in chemical pneumonitis.
Exposure far above the OEL may result in lowering of consciousness.
Effects of Long-Term or Repeated Exposure:
The liquid defats the skin.
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Physical
Properties
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Boiling point: 169-171°C
Melting point: -47°C
Relative density (water = 1): 0.93
Solubility in water:
miscible
Vapour pressure, kPa at 20°C: 0.108
Relative vapour density (air = 1): 4.0
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Relative density of the vapour/air-mixture at 20°C (air = 1): 1.0048
Flash point:
58°C c.c.
Auto-ignition temperature: 640°C
Explosive limits, vol% in air: 1.8-6.9
Octanol/water partition coefficient as log Pow: -0.14 to 1.03 (calculated)
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Environmental
Data
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N O T E S
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This card is only valid for the pure substance.The technical product may contain up to 5% acetone (see ICSC 0087), resulting in high flammability.
Other UN Classification for technical product: UN hazard class 3, UN pack group II.
Transport Emergency Card: TEC (R)-30GF1-III
NFPA Code: H1; F2; R0;
Card has been partially updated in August 2007: see Ingestion First Aid, Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 0647
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DIACETONE ALCOHOL
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(C) IPCS, CEC, 1994
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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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