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NIOSH

tert-BUTYL ACETATE

ICSC: 1445

Acetic acid, tert-butyl ester
Acetic acid, 1,1-dimethylethyl ester
C6H12O2
Molecular mass: 116.2
ICSC # 1445 		CAS # 540-88-5
RTECS # AF7400000
UN # 1123
EC # 607-026-00-7
September 10, 2002 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Highly flammable.
NO open flames, NO sparks and NO smoking.
Carbon dioxide, dry powder, foam.
EXPLOSION Above 15.5°C explosive vapour/air mixtures may be formed.
Above 15.5°C use a closed system, ventilation and explosion-proof electrical equipment.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE


•INHALATION Cough. Sore throat.
Ventilation, local exhaust or breathing protection.
Fresh air, rest.
•SKIN Dry skin.
Protective gloves.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
•EYES Redness. Pain.
Safety spectacles, or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION
Do not eat, drink, or smoke during work.
Rinse mouth.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Do NOT wash away into sewer. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place.
Fireproof. Separated from strong oxidants, strong bases, strong acids.

Note: C
F symbol
R: 11-66
S: 2-16-23-25-29-33
UN Hazard Class: 3
UN Packing Group: II
ICSC: 1445 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.

tert-BUTYL ACETATE

ICSC: 1445

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

PHYSICAL DANGERS:
The vapour is heavier than air and may travel along the ground; distant ignition possible.

CHEMICAL DANGERS:
Reacts with strong acids , strong bases , strong oxidants including nitrates causing fire and explosion hazard. Attacks plastic.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 200 ppm as TWA; (ACGIH 2002).
MAK: 20 ppm; 96 mg/m3;
Peak limitation category: II(4); Pregnancy risk group: D;
(DFG 2002).
OSHA PEL: TWA 200 ppm (950 mg/m3)
NIOSH REL: TWA 200 ppm (950 mg/m3)
NIOSH IDLH: 1500 ppm 10%LEL See: 540885


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour.

INHALATION RISK:
A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C.

EFFECTS OF SHORT-TERM EXPOSURE:
The vapour is irritating to the respiratory tract . The substance is mildly irritating to the eyes and the skin . Exposure far above the OEL could cause lowering of consciousness.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The liquid defats the skin.

PHYSICAL
PROPERTIES

Boiling point: 97.8°C
Relative density (water = 1): 0.86
Solubility in water: poor
Vapour pressure, kPa at 25°C: 6.3
Relative vapour density (air = 1) : 4
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.19
Flash point: 15.5°C c.c.
Explosive limits, vol% in air: 1.5-7.3
Octanol/water partition coefficient as log Pow: 1.76

ENVIRONMENTAL
DATA


N O T E S

Transport Emergency Card: TEC (R)-30S1123-II

ADDITIONAL INFORMATION



ICSC: 1445 tert-BUTYL ACETATE
(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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