Butyric anhydride

  • Butanoic acid anhydride
  • Butanoic anhydride
Formula
(CH3CH2CH2CO)2O
Structure
Description
Water-white or colorless liquid.
Uses
Used in prodn of cellulose acetate butyrate, drugs, & tanning agents.

Registry Numbers and Inventories.
CAS
106-31-0
EC (EINECS/ELINCS)
203-383-4
EC Class
corrosive
S 26 36/37/39 45
RTECS
ET7090000
RTECS class
Other
UN (DOT)
2739
Merck
13,1594
Beilstein/Gmelin
1099474
Beilstein Reference
4-02-00-00802
EPA OPP
77705
Swiss Giftliste 1
G-9113
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C8H14O3
Formula mass
158.20
Melting point, °C
-73
Boiling point, °C
198
Vapor pressure, mmHg
0.36 (25 C)
Saturation Concentration
Approximately 260 ppm (0.03%) or 400 ppm (0.04%) at 20 C (calculated)
Density
0.9868 g/cm3 (0 C)
Solubility in water
Decomposes
Viscosity
1.62 cp (20 C)
Surface tension
28.93 g/s2 (20 C)
Refractive index
1.4143 (18 C)
Partition coefficient, pKow
1.64
Heat of vaporization
43.5 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Corrosives area. Store protected from moisture.
B3 E
Handling
Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. 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. Remove all sources of ignition. Use a spark-proof tool. Do not get water inside containers.
Disposal code
4
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, acids, bases, reducing agents, alcohols.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
82
Autoignition, °C
279
Upper exp. limit, %
7.6
Lower exp. limit, %
1.09
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Containers may explode in the heat of a fire. Combustible Liquid. Extinguishing media: Do NOT use water directly on fire. Use water spray to cool fire-exposed containers. For small fires, use dry chemical, sand, water spray, or foam. Do NOT get water inside containers. For large fires, use water spray, fog or alcohol-resistant foam.
Fire potential
May burn but does not ignite readily.
Hazards
Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
2
 
 
Reactivity
1
 

Health.
Poison_Class
5
Exposure effects
   Ingestion
Causes gastrointestinal tract burns.
   Inhalation
Causes chemical burns to the respiratory tract. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema.
   Skin
Causes skin burns.
   Eyes
Causes eye burns.

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. Wash clothing before reuse. Destroy contaminated 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
2739
Response guide
Hazard class
8
Packing Group
III
 
11 Organic anhydrides
HS Code
2915 90 80
 
Std. Transport #
4931415