sec-Butyl acetate

  • 1-Methylpropyl acetate
  • 2-Acetoxybutane
  • DL-sec-Butyl acetate
  • Acetic acid, 1-methylpropyl ester
Formula
CH3COOCH(CH3)CH2CH3
Structure
Description
Colorless liquid. Has fruity odor characteristic of acetate esters.
Uses
Solvent for nitrocellulose lacquers, thinners, nail enamels, leather finishes.

Registry Numbers and Inventories.
CAS
105-46-4
EC (EINECS/ELINCS)
203-300-1
EC Index Number
607-026-00-7
EC Class
Highly flammable; Repeated exposure may cause skin dryness or cracking
R 11 66
S 16 23 25 29 33
RTECS
AF7380000
RTECS class
Other
UN (DOT)
1123
Merck
13,1535
Beilstein/Gmelin
1720689
Beilstein Reference
4-02-00-00148
Swiss Giftliste 1
G-3313
Canada DSL/NDSL
DSL
US TSCA
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C6H12O2
Formula mass
116.16
Melting point, °C
-98.9
Boiling point, °C
112
Vapor pressure, mmHg
21.6 (25 C)
Vapor density (air=1)
4.0
Critical temperature
288
Critical pressure
32
Density
0.892 g/cm3 (0 C)
Solubility in water
Slightly soluble
Viscosity
0.60 cp (25 C)
Surface tension
24.46 g/s2 (13 C)
Refractive index
1.3875 (20 C)
Partition coefficient, pKow
1.72
Heat of vaporization
35.1 kJ/mol
Heat of combustion
-3538 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area.
B2
Handling
Wash thoroughly after handling. Use spark-proof tools and explosion proof equipment. Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid contact with heat, sparks and flame. Use only in a chemical fume hood. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Wash area with soap and water. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents, strong acids, strong bases, amines, nitrates.
Decomposition
Carbon monoxide, carbon dioxide, acrid smoke and fumes.

Fire.
Flash Point,°C
16
Autoignition, °C
422
Upper exp. limit, %
7.6
Lower exp. limit, %
1.7
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Use foam, dry chemical, or carbon dioxide. Water may be ineffective.
Fire potential
Flammable liquid and vapor.
Hazards
Flashback along vapor trail may occur.
Combustion products
Toxic vapors and gases (such as carbon monoxide) may be released in a fire involving sec-butyl acetate.
Health
1
 
Flammability
3
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV (as TWA): 200 ppm; 950 mg/m3 (ACGIH 1995-1996). OSHA PEL: TWA 200 ppm (950 mg/m3) NIOSH REL: TWA 200 ppm (950 mg/m3) NIOSH IDLH: 1700 ppm LEL
Poison_Class
5
Exposure effects
Chronic inhalation may cause effects similar to those of acute inhalation.
   Ingestion
May cause irritation of the digestive tract.
   Inhalation
Causes respiratory tract irritation. Exposure produces central nervous system depression. Vapor or mist is irritating to the mucous membranes and upper respiratory tract.
   Skin
Causes skin irritation. Prolonged and/or repeated contact may cause irritation and/or dermatitis.
   Eyes
Vapors cause eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1123
Response guide
Hazard class
3
Packing Group
II; III
 
USCG CHRIS Code
BTA
 
IMO Chemical Code
17
IMO Pollution Category
C
IMO Hazard code
P