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401757

Tetrahydrofuran

≥99.9%, anhydrous, inhibitor-free

Synonym(s):

THF, Butylene oxide, Oxolane, Tetramethylene oxide

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About This Item

Linear Formula:
(CH2)3CH2O
CAS Number:
109-99-9
Molecular Weight:
72.11
NACRES:
NA.21
PubChem Substance ID:
57649919
UNSPSC Code:
12191501
EC Number:
203-726-8
MDL number:
MFCD00005356
Beilstein/REAXYS Number:
102391
Assay:
≥99.9%
Grade:
anhydrous
Bp:
65-67 °C (lit.)
Vapor pressure:
114 mmHg ( 15 °C), 143 mmHg ( 20 °C)
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Product Name

Tetrahydrofuran, anhydrous, ≥99.9%, inhibitor-free

grade

anhydrous

Quality Segment

vapor density

2.5 (vs air)

vapor pressure

114 mmHg ( 15 °C), 143 mmHg ( 20 °C)

assay

≥99.9%

form

liquid

autoignition temp.

610 °F

expl. lim.

1.8-11.8 %

impurities

≤20 ppm peroxide (as H2O2), <0.002% water, <0.005% water (100 mL pkg)

evapn. residue

<0.0005%

refractive index

n20/D 1.407 (lit.)

pH

~7

bp

65-67 °C (lit.)

mp

−108 °C (lit.)

solubility

H2O: soluble

density

0.889 g/mL at 25 °C (lit.)

SMILES string

C1CCOC1

InChI

1S/C4H8O/c1-2-4-5-3-1/h1-4H2

InChI key

WYURNTSHIVDZCO-UHFFFAOYSA-N

General description

Our anhydrous solvents deliver exceptionally low water content, making them the ideal choice for moisture-sensitive laboratory applications. Packaged in the exclusive Sure/Seal™ septum bottle system, they are reliably protected against moisture ingress from first use to last drop. The innovative Sure/Seal™ closure combines an advanced plug-style liner with an airtight elastomer and crimp cap design to ensure consistent product integrity. Three unique liner materials provide optimal chemical compatibility across a broad range of solvents. Sure/Seal™ packaging is proven to maintain anhydrous conditions even after repeated punctures. With more than 70 products across all major solvent families, available in pack sizes from 100 mL to 2 L, the portfolio meets virtually every laboratory need. By choosing ready-to-use anhydrous solvents in Sure/Seal™ packaging, researchers eliminate the need for time-consuming and hazardous in-house solvent drying and distillation - saving time, reducing risk, and improving reproducibility.

Application

Anhydrous solvents in Sure/Seal™ packaging are essential wherever water contamination would compromise experimental results. They are widely used in moisture-sensitive applications such as organic synthesis - including Grignard reactions, organometallic chemistry, and catalysis - as well as in peptide, oligonucleotide, and pharmaceutical synthesis.

Packaging

View returnable container options.

Other Notes

"Greener alternatives are available for many THF applications, 2-Methyltetrahydrofuran (673277) and Cyclopentyl methyl ether (791962)

Read more about THF alternatives:

2-Methyltetrahydroun (2-MeTHF): A biomass-Derived solvent with Broad Applications in Organic Chemistry

The toxicological assessment of cyclopentyl methyl ether (CPME) as a green solvent"
Pure-Pac® II containers require the Micromatic MacroValve coupler for dispensing solvents, Z560723.

Legal Information

Sure/Seal is a trademark of Sigma-Aldrich Co. LLC
Pure-Pac is a registered trademark of Merck KGaA, Darmstadt, Germany

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Signal Word

Danger

Target Organs

Central nervous system, Respiratory system

supp_hazards

EUH019

Storage Class

3 - Flammable liquids

Flash Point (°F)

-6.2 °F - closed cup

Flash Point (°C)

-21.2 °C - closed cup

PPE (personal protective equipment)

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

Hazard Classifications

Acute Tox. 4 Oral - Carc. 2 - Eye Dam. 1 - Flam. Liq. 2 - STOT SE 3

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