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average Mn ~650

Terathane® 650 polyether glycol, poly(tetramethylene ether), α-Hydro-ω-hydroxypoly(oxy-1,4-butanediyl), Poly(1,4-butanediol), polyTHF
Linear Formula:
CAS Number:
MDL number:
PubChem Substance ID:

vapor pressure

<0.01 mmHg ( 25 °C)
<1 mmHg ( 20 °C)

Quality Level

mol wt

average Mn ~650


0.05-0.07% BHT as stabilizer

refractive index

n20/D 1.465


11-19 °C


0.978 g/mL at 25 °C

SMILES string




InChI key


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General description

Poly(tetrahydrofuran) (PTHF) is a highly flexible hydrophobic polymer widely used in the synthesis of thermoplastic elastomers such as polyesters and polyurethanes. The addition of PHTF imparts abrasion resistance, hydrolytic stability, and attractive dynamic properties to the material. This polymer can also be used to prepare block copolymers, end-functional star polymers, amphiphilic conetworks, and thermogels.


Poly(tetrahydrofuran) can be used as a precursor to synthesize epoxy-urethane polymer networks. It can also be used as a diol comonomer to synthesize block copolymers, such as poly-(alkyleneterephthalаte-co-alkylenephosphate).

Legal Information

Terathane is a registered trademark of Invista North America S.a.r.l.


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Hazard Statements

Hazard Classifications

Acute Tox. 4 Oral - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

10 - Combustible liquids



Flash Point(F)

474.8 °F - Cleveland open cup

Flash Point(C)

246 °C - Cleveland open cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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