Furan

  • Furfuran
  • Oxole
  • Tetrole
  • Divinyl oxide
Formula
C4H4O
Structure
Description
A clear colorless liquid with a strong odor.
Uses
Chemical intermediate for tetrahydrofuran.

Registry Numbers and Inventories.
CAS
110-00-9
EC (EINECS/ELINCS)
203-727-3
EC Index Number
603-105-00-5
EC Class
Extremely flammable; May form explosive peroxides; Carcinogenic Category 2; Mutagenic Category 3; Harmful; Irritant; Dangerous for the Environment
R 45 12 19 20/22 38 48/22 52/53
S 53 45 61
RTECS
LT8524000
RTECS class
Tumorigen; Mutagen; Reproductive Effector
UN (DOT)
2389
Merck
13,4317
Beilstein/Gmelin
103221
Beilstein Reference
5-17-01-00291
RCRA
U124
Swiss Giftliste 1
G-1645
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H4O
Formula mass
68.08
Melting point, °C
-86
Boiling point, °C
31.4
Vapor pressure, mmHg
493 (25 C)
Vapor density (air=1)
2.3
Saturation Concentration
1870 g/m3 (20 C)
Critical temperature
214
Critical pressure
52.50
Density
0.9371 g/cm3 (20 C)
Solubility in water
< 1 mg/ml
Viscosity
0.39 cp (25 C)
Surface tension
24.57 g/s2 (16 C)
Refractive index
1.4216 (20 C)
Partition coefficient, pKow
1.34
Heat of fusion
3.8 kJ/mol
Heat of vaporization
28.51 kJ/mol
Heat of combustion
-2085 kJ/mol

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. Regularly check inhibitor levels to maintain peroxide levels below 1%. After opening, purge container with nitrogen before reclosing. Periodically test for peroxide formation on long-term storage. Addition of water or appropriate reducing materials will lessen peroxide formation.
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. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. If peroxide formation is suspected, do not open or move container. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Do not distill since this removes peroxide-inhibitors.
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. Provide ventilation. A vapor suppressing foam may be used to reduce vapors.
Disposal code
1
Stability
Stable under normal temperatures and pressures. May form peroxides in the absence on inhibitors
Incompatibilities
Oxidizing agents
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
-36
Autoignition, °C
390
Upper exp. limit, %
14.3
Lower exp. limit, %
2.3
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. Extremely flammable liquid. Containers may explode in the heat of a fire. May polymerize explosively when involved in a fire. Will be easily ignited by heat, sparks or flame. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. Do NOT use straight streams of water.
Fire potential
Highly dangerous when exposed to heat or flame
Hazards
Very dangerous, upon exposure to heat or flame. It may form unstable peroxides on exposure to air. Contact with acids can initiate a violent, heat producing reaction. Avoid acids, oxidizing agents. Upon standing in air, it may form unstable peroxides.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
4
 
 
Reactivity
1
 

Health.
Carcinogin
I-2B, N-2, CP65
Poison_Class
3
Exposure effects
Chronic exposure may cause liver damage.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause liver damage.
   Inhalation
Vapors may cause dizziness or suffocation. May cause nausea, dizziness, and headache. Inhalation may cause respiratory tract irritation, oppression in the chest, dyspnea, central nervous system depression, and temporary visual disturbances.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation. At high concentrations may cause lacrimation (tearing) and 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.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
2389
Response guide
Hazard class
3
Packing Group
I
 
USCG CHRIS Code
FUR
 
HS Code
2932 19 00
 
Std. Transport #
4909175