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We need these materials for the polyurethane foam production on regular bases Please quote. CAS Number 26471-62-5 toluene diisocyanate (TDI 80/20) mixture: CAS Number 26471-62-5 toluene diisocyanate (TDI 65/35) mixture: CAS Number: 25322-69-4 Polypropylene Glycol (PPG 1000), molecular weights 1000 g/mol CAS Number: 25322-69-4 Polypropylene Glycol (PPG 2000), molecular weights 2000 g/mol thanks for earlier reply. Nasir Ali. islamabad pakistan.