... product is mainly used for the soft (hard) foam polyurethane, epoxy resin, polystyrene, acrylic, cellulose acetate, ethyl cellulose and Bakelite ... : Index name Name Appearance colorless or light yellow oily transparent liquid Chroma(Pt-Co) 50# Acidity(mgKOH/g) ≤0.05 ... is mainly used as f soft or hard polyurethane foam, epoxy resin polystyrene, acrylic acid, cellulose acetate, ethyl cellulose paint, ...