Secondary isoamyl alcohol

  • 3-Methyl-2-butanol
  • 3-Methylbutan-2-ol
  • DL-3-Methyl-2-butanol
Formula
(CH3)2CHCH(OH)CH3
Structure
Description
Clear, colorless liquid, with a characteristic, slightly pungent and penetrating odor.
Uses
The secondary pentanols or amyl alcohols, such as 3-methyl-2-butanol, are used in the production of catalyst systems for dimerization and polymerization, and for the synthesis of methanol from carbon dioxide and hydrogen. They may also be used in organic synthesis; as solvents, chemical intermediates, lubricant additives, cleaning agents, defrosting agents, various herbicides and fragrances. 3-Methyl-2-butanol is also used as a stabilizing agent for tetrachloroethane.

Registry Numbers and Inventories.
CAS
598-75-4
EC (EINECS/ELINCS)
209-950-2
EC Class
flammable, harmful
R 10 20
UN (DOT)
1105
Merck
12,6110
Beilstein/Gmelin
1718800
Beilstein Reference
4-01-00-01675
Swiss Giftliste 1
G-2435
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C5H12O
Formula mass
88.15
Boiling point, °C
112
Vapor pressure, mmHg
517 (100 C)
Saturation Concentration
Approximately 8000 ppm (0.8%) at 20 C; 12000 ppm (1.2%) at 25 C (calculated)
Critical temperature
283
Critical pressure
38.2
Density
0.82 g/cm3 (20 C)
Solubility in water
28 g/L
Viscosity
3.51 cp (25 C)
Surface tension
23 g/s2 (25 C)
Refractive index
1.4091 (20 C)
Heat of vaporization
51.6 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Flammables-area.
B2 D2B
Handling
Use spark-proof tools and explosion proof equipment. Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Take precautionary measures against static discharges.
Protection
Eyes: Wear chemical goggles. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
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. Provide ventilation.
Stability
No data.
Incompatibilities
Strong oxidizing agents - reducing agents.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
26
Autoignition, °C
437
Upper exp. limit, %
9.9
Lower exp. limit, %
1.5
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. Extinguishing media: Use water spray to cool fire-exposed containers. Use foam, dry chemical, or carbon dioxide.
Fire potential
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
NIOSH REL: TWA 100 ppm (360 mg/m3) ST 125 ppm (450 mg/m3) OSHA PEL: TWA 100 ppm (360 mg/m3) IDLH 500 ppm
Poison_Class
4
Exposure effects
Prolonged or repeated exposure may cause nausea, dizziness, and headache.
   Ingestion
May be harmful if swallowed.
   Inhalation
Harmful if inhaled.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.

Transport.
UN number
1105
Response guide
Hazard class
3
Packing Group
II; III
 
USCG CHRIS Code
AAI
 
20 Alcohols, Glycols
HS Code
2905 15 00
 
IMO Chemical Code
18
IMO Pollution Category
D