CAS number : 25190-06-1
molecular formula : C8H18O4
Chemical Name : polytetramethylene ether glycol; polytetrahydrofuran
Purpose :PTMEG is mainly used in the production of polyurethane elastomers, polyurethane elastic fibers (called spandex domestically, and spandex internationally) and ester-ether copolymerized elastomers.
Product Packaging :200KG barrel, loose water
Test parameters |
Value |
Test method |
Molecular Weight |
625-675g/mol |
Calculation value |
Hydroxyl |
166.2-179.5mg KOH / g |
NIRMethod |
Maximum acidity |
0.05 mg KOH/g |
DIN EN ISO 2114 |
Water content |
≤150 mg/kg |
DIN 51 777 |
Chroma |
≤40 APHA |
DIN EN 1557 |