General Purpose Polystyrene (GPPS)

Store sealed in a clean, dry warehouse away from direct heat, UV exposure, dust and cross-contamination. Control pellet spills because they create a significant slip hazard. During processing, maintain the supplier’s recommended melt-temperature window and adequate ventilation; overheating can generate styrene and other thermal-decomposition vapours.
HSE control principle
Use the current product-specific SDS, local dangerous-goods requirements, receiving-site risk assessment and applicable engineering standards. Website text should never substitute for a supplier SDS or site procedure.

A technically meaningful RFQ should define the key quality parameters that control GPPS processing and finished-part performance. Typical COA and technical requirements include MFR/MVR, density, tensile properties, Vicat softening temperature, HDT, optical transmission/haze, residual styrene or volatiles, and colour/yellowness. MFR/MVR should be tested according to ISO 1133 or ASTM D1238 with the exact temperature and load stated, as it directly affects flow and processability. Density under ISO 1183 or ASTM D792 supports identity and lot consistency, while tensile properties under ISO 527 or ASTM D638 indicate rigidity and strength. Thermal behaviour is assessed through Vicat softening (ISO 306 / ASTM D1525) and HDT (ISO 75 / ASTM D648). For transparent applications, optical transmission and haze should be checked using ASTM D1003. Residual styrene/volatiles may be measured by supplier methods or GC where specified, particularly for odour, regulatory, and process-quality control. Colour and yellowness should also be monitored using ASTM E313 or an equivalent supplier method to ensure appearance consistency. Final testing requirements should match the producer specification, customer standard, processing conditions, and intended application.