Polymers & Resins
REACH
Polytetrahydrofuran
CAS Number
25190-06-1
EC Number
607-637-9
Abbreviation
PTMEG
What is Polytetrahydrofuran?
Polytetrahydrofuran (CAS 25190-06-1), also known as PTMEG or Polytetramethylene Ether Glycol, is a difunctional polyether diol used as a building block in high-performance polymer synthesis.
Where is Polytetrahydrofuran used?
- Polyurethane and elastomer systems: soft-segment component influencing flexibility, elongation and low-temperature performance
- Polyurethane manufacturing: reacts with diisocyanates to produce elastic fibers such as spandex and Lycra
- Thermoplastic polyurethane (TPU): elastomers for automotive seals, hoses and flexible tubing
- Textile and apparel: PTMEG-based polyurethane urea is the standard intermediate for high-elasticity fabrics
- Lubricants: plasticizing and carrier component in specialty greases and metalworking fluids
- Molecular weight grade determines stretch-recovery characteristics.
Commercial specifications
- Common commercial grades: 650, 1000, 1800 and 2000 g/mol
- Technical and industrial grades standard; higher-purity grades for fiber and medical-grade polyurethane
- Bulk supply in heated drums
Other Names (Synonyms)
(2S)-2-butoxybutan-1-ol|Polytetramethylene ether glycol (ptmeg)|Polytetramethylene glycol|PTMEG
What are the physical properties of Polytetrahydrofuran?
Melting Point 20 °C
Boiling Point >204
Density 0.978 g/cm³ @ Temp: 23 °C
Flash Point >230 °F
Form Fused mass
Water Solubility <10g/L
Vapor Pressure <0.01 mm Hg ( 25 °C)
Refractive Index n 20/D 1.465
pH 7 (H2O, 20℃)Aqueous solution
How is Polytetrahydrofuran classified and handled safely? Learn More
Warning
GHS07· Irritant
Hazard Statements
H319 Causes serious eye irritation
H412 Harmful to aquatic life with long lasting effects
Precautionary Statements
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P501 Dispose of contents/container in accordance with local regulations.
P264+P265 Wash … thoroughly after handling.
P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Which trade and regulatory codes apply to Polytetrahydrofuran?
HS Code 3907 20 20
Storage Class 11 - Combustible Solids
WGK (Germany) 1