Import 250ml Fep Volumetric Flask — Buy in wholesale FOB from Supplier in China

This 250 mL volumetric flask is moulded from virgin fluorinated ethylene propylene (FEP), a fully fluorinated polymer that withstands temperatures from -200 °C to 205 °C and resists attack from concentrated acids, bases, and organic solvents that would degrade glass or conventional plastics. The single-neck design with a precision-machined screw cap replaces the traditional ground-glass stopper, eliminating seizing and reducing particulate contamination in trace-element work. The nominal capacity of 250 mL (typical tolerance ±0.15 mL for Class A volumetric ware) is marked by an inscribed graduation ring, though buyers should confirm the exact tolerance class with the supplier before ordering.

FEP's surface energy (16 dyn/cm, typical) is lower than PTFE, polypropylene, or borosilicate glass, so aqueous samples drain completely with minimal meniscus retention, a critical advantage in ICP-MS and semiconductor-grade analysis where carryover must be below ppt levels. The material is transparent enough for visual meniscus reading, yet unlike glass it will not shatter under thermal shock or mechanical impact. The screw cap threads are moulded integral to the neck, so there are no separate liner materials to extract or leach. OEM customisation is available, including alternative neck finishes, etched serial numbers, or modified cap liners for specific solvent compatibilities.

Target buyers include environmental testing laboratories, pharmaceutical QC departments, semiconductor fabs, and geochemical survey teams who require inert, low-background containers for digestions, standard preparations, and sample storage. The flask is suitable for autoclave sterilisation (121 °C steam), ethylene oxide gas, and chemical decontamination protocols. For import, confirm whether the supplier provides batch-specific trace-metal certificates, as FEP resin lots can vary in background metal content; also verify cap torque specifications and whether replacement caps are offered as separate SKUs.

Nanjing Binzhenghong Instrument Co, Ltd. is located at 301, Building 10, Baijiahui Chuangxin Community, No. 699-18 Xuanwu Avenue, Xuanwu District, Nanjing, Jiangsu Province, China. The supplier holds a harbour trust tier on the marketplace, with a listed response rate of 0.00 percent and zero average response hours, which suggests the profile may be newly registered or currently dormant. Buyers should not assume active customer service without direct contact.

The company profile does not state a founding year, employee headcount, annual revenue, ISO certification, or client list, so any such claims must be requested directly from the supplier. The listing emphasises OEM capability and invites contact for further details, indicating a business model open to customised laboratory plasticware. The address places the supplier in Nanjing's Xuanwu District, a commercial zone with instrument and technology clusters. Before committing, buyers should verify the supplier's manufacturing scope (in-house moulding versus trading), quality-control documentation for resin sourcing, and whether lot traceability is available.