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 (called spandex domestically, and Spandex internationally) and ester ether copolymer elastomers.

Product packaging: 200KG barrels, bulk water

Test Parameters Values Test Methods
Molecular weight 2000±50g/mol SMT1701
Hydroxyl value 54.7-57.5mg KOH/g Calculated value
Maximum acid value 0.05 mg KOH/g SMT1702
Water content ≤150 mg/kg SMT1002
Chroma ≤40 APHA   SMT0201
Stabilizer, BHT 200-300 ppm SMT1703