Isobutyl aldehyde

  • Isobutyraldehyde
  • 3-Methylpropanal
  • Isobutyric aldehyde
  • Isobutanal
  • 2-Methyl-1-propanal
Formula
(CH3)2CHCHO
Structure
Description
Clear colorless liquid, sharp, pungent odor.
Uses
Synthesis of pantothenic acid, cellulose esters, perfumes, flavors, and gasoline additives.

Registry Numbers and Inventories.
CAS
78-84-2
EC (EINECS/ELINCS)
201-149-6
EC Class
highly flammable
S 16 23 24/25 33
RTECS
NQ4025000
RTECS class
Tumorigen; Reproductive Effector; Primary Irritant
UN (DOT)
2045
Merck
13,5171
Beilstein/Gmelin
605330
Beilstein Reference
4-01-00-03262
Swiss Giftliste 1
G-2301
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C4H8O
Formula mass
72.10
Melting point, °C
-65
Boiling point, °C
64
Vapor pressure, mmHg
147 (25 C)
Vapor density (air=1)
2.5
Saturation Concentration
22.4% at 20 C (calculated)
Odor Threshold Odor threshold 0.047 ppm
Critical temperature
240
Critical pressure
0.42
Density
0.794 g/cm3 (20 C)
Solubility in water
67 g/L
Viscosity
0.683 cp (20 C)
Surface tension
22.0 g/s2 (20 C)
Refractive index
1.373 (20 C)
Dipole moment
2.58 D
Partition coefficient, pKow
0.72
Heat of vaporization
30.9 kJ/mol
Heat of combustion
-2469 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container.
Handling
Wash thoroughly after handling. Wash hands before eating. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. 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. 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. Clean up spills immediately, using the appropriate protective equipment. Scoop up with a nonsparking tool, then place into a suitable container for disposal.
Disposal code
7
Stability
Unstable.
Incompatibilities
Oxidizing agents, reducing agents, bases, alliphatic amines, aromatic amines.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
-20
Autoignition, °C
165
Upper exp. limit, %
11.0
Lower exp. limit, %
1.6
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use dry chemical, carbon dioxide, or alcohol-resistant foam.
Fire potential
Flammable liquid and vapor.
Hazards
Vapors are heavier than air and may travel considerable distance to a source of ignition and flash back. Fires are difficult to control due to ease of reignition.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
3
 
 
Reactivity
2
 

Health.
Poison_Class
4
Exposure effects
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
Causes respiratory tract irritation.
   Skin
May cause severe irritation and possible burns.
   Eyes
May cause severe eye irritation. May result in corneal injury.

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
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
2045
Response guide
Hazard class
3
Packing Group
II
 
USCG CHRIS Code
BAD
 
HS Code
2912 19 00
 
Std. Transport #
4908185
 
IMO Chemical Code
17
IMO Pollution Category
C
IMO Hazard code
S/P