THF CAS#109-99-9

CAS Number: 109-99-9
Chemical Formula: C4H8O
Synonyms:

TETRAMETHYLENE ETHER GLYCOL 2000 POLYMER
Tetrahydrofuran ,99.8% [Tetrahydrofuran,ACS/HPLC Certified]
Tetrahydrofuran, 99.6%, stabilized with BHT, for analysis ACS

Appearance: Colorless Liquid

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

THF CAS#109-99-9

Tetrahydrofuran (THF) is a colorless, volatile liquid with an ethereal or acetonelike smell and is miscible in water and most organic solvents.It is highly flammable and may thermally decompose to carbon monoxide and carbon dioxide. Prolonged storage in contact with air and in the absence of an antioxidant may cause THF to decompose into explosive peroxides.

Tetrahydrofuran is used in the manufacture of polymers as well as agricultural, pharmaceutical, and commodity chemicals. Manufacturing activities commonly occur in closed systems or under engineering controls that limit worker exposure and release to the environment. THF is also used as a solvent (e.g., pipe fitting) that may result in more significant exposures when used in confined spaces without sufficient ventilation. Although THF is naturally present in coffee aroma, floured chickpeas, and cooked chicken, natural exposures are not anticipated to pose a significant hazard.

Tetrahydrofuran 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
Fp	>230 °F
storage temp.	Store at +5°C to +30°C.
solubility	water: soluble
form	Liquid
Specific Gravity	0.89
color	<10(APHA)
Odor	Ethereal, detectable at 2 to 50 ppm
PH	7-8 (200g/l, H2O, 20℃)
PH Range	7
Relative polarity	0.207
explosive limit	1.5-12.4%(V)
Water Solubility	miscible
FreezingPoint	-108℃
λmax	λ: 245 nm Amax: ≤0.26 λ: 275 nm Amax: ≤0.046 λ: 315 μm Amax: ≤0.0044
Sensitive	Air Sensitive & Hygroscopic
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).
Dielectric constant	11.6（-70℃）
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 stabilizer.
InChI	1S/C4H8O/c1-2-4-5-3-1/h1-4H2
InChIKey	WYURNTSHIVDZCO-UHFFFAOYSA-N
SMILES	C1CCOC1
LogP	0.45 at 25℃
Surface tension	27.31mN/m at 293.15K
CAS DataBase Reference	109-99-9(CAS DataBase Reference)
NIST Chemistry Reference	Furan, tetrahydro-(109-99-9)
IARC	2B (Vol. 119) 2019
EPA Substance Registry System	Tetrahydrofuran (109-99-9)
Absorption	≤0.0044 at 315nm ≤0.005 at 350nm ≤0.005 at 400nm ≤0.02 at 300nm ≤0.046 at 275nm ≤0.18 at 250nm ≤0.26 at 245nm ≤1.0 at 212nm

Safety Information

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
OEB	A
OEL	TWA: 200 ppm (590 mg/m3), STEL: 250 ppm (735 mg/m3)
WGK Germany	1
RTECS	MD0916000
F	3-10-23
Autoignition Temperature	610 °F
TSCA	TSCA listed
HazardClass	3
PackingGroup	II
HS Code	29321100
Storage Class	3 - Flammable liquids
Hazard Classifications	Acute Tox. 4 Oral Carc. 2 Eye Irrit. 2 Flam. Liq. 2 STOT SE 3
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]

Product Application of THF CAS#109-99-9

Solvent for high polymers, especially polyvinyl chloride. As reaction medium for Grignard and metal hydride reactions. In the synthesis of butyrolactone, succinic acid, 1,4-butanediol diacetate. Solvent in histological techniques. May be used under Federal Food, Drug & Cosmetic Act for fabrication of articles for packaging, transporting, or storing of foods if residual amount does not exceed 1.5% of the film: Fed. Regist. 27, 3919 (Apr. 25, 1962).

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