5-Methylhexan-2-one

  • Methylhexanone
  • Methyl Isoamyl Ketone
Formula
C7H14O
Structure
Description
Colorless liquid, pleasant odor.
Uses
Solvent for nitrocellulose, cellulose acetate, butyrate, acrylics, & vinyl copolymers.

Registry Numbers and Inventories.
CAS
110-12-3
EC (EINECS/ELINCS)
203-737-8
EC Index Number
606-026-00-4
EC Class
Flammable; Harmful
R 10 20
S 23 24/25
RTECS
MP3850000
RTECS class
Agricultural Chemical and Pesticide; Primary Irritant
UN (DOT)
2302
Beilstein/Gmelin
506163
Beilstein Reference
4-01-00-03329
Swiss Giftliste 1
G-2467
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C7H14O
Formula mass
114.21
Melting point, °C
-74
Boiling point, °C
144
Vapor pressure, mmHg
6
Vapor density (air=1)
3.9
Saturation Concentration
6580 ppm (0.66%) at 20 C (calculated)
Evaporization number
0.5 (n-butyl acetate = 1)
Odor Threshold Odor threshold 0.012 ppm
Critical temperature
331
Critical pressure
29.8
Density
0.83 g/cm3 (0 C)
Solubility in water
5 g/L
Viscosity
0.77 cp at 20C
Refractive index
1.4078 (20 C)
Partition coefficient, pKow
1.88
Heat of vaporization
35.02 kj/mol @ 101.3 kPa

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. 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.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Ground and bond containers when transferring material. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. 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. A vapor suppressing foam may be used to reduce vapors.
Disposal code
1
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
43
Autoignition, °C
455
Upper exp. limit, %
8.8
Lower exp. limit, %
1.4
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Extinguishing media: Water may be ineffective. In case of fire, use water spray, dry chemical, carbon dioxide, or alcohol-resistant foam.
Fire potential
HIGHLY FLAMMABLE.
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. May polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
3
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: TWA 50 ppm (240 mg/m3) OSHA PEL: TWA 100 ppm (475 mg/m3)
Poison_Class
4
Exposure effects
Prolonged or repeated skin contact may cause dermatitis. Repeated exposure may cause sensitization dermatitis.
   Ingestion
May cause irritation of the digestive tract. May cause liver damage.
   Inhalation
May cause respiratory tract irritation. Vapors may cause dizziness or suffocation.
   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. 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. 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. Get medical aid immediately.

Transport.
UN number
2302
Response guide
Hazard class
3
Packing Group
III
 
USCG CHRIS Code
QNL
 
HS Code
2914 19 10
 
Std. Transport #
4909234