CAS Number: 25190-06-1
Molecular formula: C8H18O4
Chemical name: polytetramethylene ether glycol; polytetrahydrofuran

Uses: PTMEG is mainly used in the production of polyurethane elastomers, polyurethane elastic fibers (known as spandex in domestic and Spandex in international) and ester ether copolymer elastomers.

Product packaging: 200KG barrels, bulk water

Test Parameters Values Test Methods
Molecular weight 625-675g/mol Calculation value
Hydroxyl value 166.2-179.5mg KOH / g NIR method
Maximum acid value 0.05 mg KOH/g DIN EN ISO 2114
Water content ≤150 mg/kg DIN 51 777
Chroma ≤40 APHA DIN EN 1557