How does the CAS registry number distinguish between two Rubber & Related Items listings that look identical?

The CAS registry number provides the definitive chemical identity, separating technical grade compounds from those intended for food or pharma use. Two listings may both claim to be rubber chemicals, but if the CAS numbers differ, the molecular structure and associated impurity profiles are distinct, affecting safety data sheets and end-use compatibility.

What specific field on a row indicates the impurity profile for a rubber chemical?

Look for the assay or active content percentage listed alongside the impurity limits. This field reveals the concentration of the active ingredient and the maximum allowed levels of contaminants, which determines whether the material meets the strict requirements for a specific technical or pharmaceutical application.

Why does the UN number matter more than the product name for shipping?

The UN number dictates the hazard class, which determines the packing group and the specific dangerous-goods declaration required. Carriers use this number to decide which vessels accept the booking, making it the primary factor in securing space and calculating freight costs for hazardous rubber-related shipments.

How does the packing format change the freight charge for rubber chemicals?

Choosing between a drum, IBC, or ISO tank directly impacts the volumetric weight and handling requirements. An ISO tank may reduce packaging costs but requires specialized cleaning and filling infrastructure, while drums incur higher per-unit freight charges due to their lower density and increased palletization needs.

What documentation issue causes delays for a Butyl bladder shipment into Europe?

Delays often occur when the safety data sheet does not match the destination format or lacks the required REACH registration details. The customs authority requires explicit proof that the butyl rubber compound complies with local chemical regulations, and missing or mismatched documentation halts the clearance process immediately.

How does the impurity profile affect the usable yield of a rubber chemical?

A higher impurity profile reduces the effective amount of active ingredient available for the manufacturing process. Buyers must calculate the yield based on the assay percentage and impurity limits, as even small variations can significantly impact the final product quality and production efficiency in rubber compounding.

What separates a polyurethane foam scrap quote from a new material quote?

Polyurethane foam scrap is priced based on density, contamination levels, and consistency, rather than chemical assay or CAS identity. New materials are valued by their molecular structure and purity, while scrap is treated as a raw material recovery stream, leading to different pricing models and quality verification standards.

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Rubber & Related Items Suppliers, Manufacturers and Exporters in China

Global Trade Plaza is a B2B marketplace connecting Rubber & Related Items suppliers and exporters from China with importers and wholesale buyers, with support on logistics, customs and compliance.

Of the 279 Rubber & Related Items listings on the platform, 19 were filed from China by 15 separate companies. The 19 Rubber & Related Items rows differ on grade, packing and order minimum, so read the specification on each one.