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Tetrahydrofuran Structure


Chemical Properties

Melting point -108°C
Boiling point 66 °C
Density  0.887 g/mL at 20 °C
vapor density  2.5 (vs air)
vapor pressure  <0.01 mm Hg ( 25 °C)
refractive index  n20/D 1.465
Flash point >230 °F
storage temp.  Store at +5°C to +30°C.
solubility  water: soluble
form  Liquid
Specific Gravity 0.89
color  <10(APHA)
PH Range 7
Relative polarity 0.207
PH 7-8 (200g/l, H2O, 20℃)
Odor Ethereal, detectable at 2 to 50 ppm
explosive limit 1.5-12.4%(V)
Water Solubility  miscible
FreezingPoint  -108℃
Sensitive  Air Sensitive & Hygroscopic
λmax λ: 245 nm Amax: ≤0.26
λ: 275 nm Amax: ≤0.046
λ: 315 μm Amax: ≤0.0044
Merck  14,9211
BRN  102391
Henry's Law Constant 1.54 (static headspace-GC, Welke et al., 1998)
Exposure limits TLV-TWA 200 ppm (590 mg/m3) (ACGIH, MSHA, and OSHA); STEL 250 ppm (ACGIH); IDLH 20,000 ppm (NIOSH).
Stability Stable. Incompatible with halogens, strong oxidizing agents, strong reducing agents, strong bases, oxygen. May generate explosive peroxides in storage if in contact with air. Highly flammable. Store at room temperature under nitrogen. Hazardous polymerisation may occur. Light sensitive. May contain 2,6-di-tertbutyl-4-methylphenol (BHT) as a s
LogP 0.45 at 25℃
FDA 21 CFR 178.3950; 175.105; 175.320; 177.1200
Indirect Additives used in Food Contact Substances TETRAHYDROFURAN
CAS DataBase Reference 109-99-9(CAS DataBase Reference)
EWG's Food Scores 3
IARC 2B (Vol. 119) 2019
NIST Chemistry Reference Furan, tetrahydro-(109-99-9)
EPA Substance Registry System Tetrahydrofuran (109-99-9)


Signal wordDanger
Hazard statements H225-H302-H319-H335-H336-H351
Precautionary statements P201-P202-P210-P301+P312-P305+P351+P338-P308+P313
Hazard Codes  Xi,F,Xn
Risk Statements  36/37/38-36/37-19-11-40
Safety Statements  26-36-33-29-16-46-37-13
RIDADR  UN 2924 3/PG 2
WGK Germany  1
RTECS  MD0916000
Autoignition Temperature 610 °F
HazardClass  3
PackingGroup  II
HS Code  29321100
Hazardous Substances Data 109-99-9(Hazardous Substances Data)
Toxicity LD50 oral (rat) 2880 mg/kg
LC50 inhal (rat) 21,000 ppm (3 h)
PEL (OSHA) 200 ppm (590 mg/m3)
TLV-TWA (ACGIH) 200 ppm (590 mg/m3)
STEL (ACGIH) 250 ppm (737 mg/m3)
IDLA 2,000 ppm [10% LEL]
NFPA 704:
2 1

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