从China供应商批发进口500ml Erlenmeyer Flask — FOB条款

The 500ml Erlenmeyer Flask from Luoyang Fudau Biotech Co. Ltd. is a borosilicate glass vessel measuring 178.8 mm in overall height, with a 39 mm neck diameter and 101 mm bottom diameter. The flask offers a 125 ml working volume despite its 500 ml nominal capacity, a design choice that accommodates foam headspace during agitation and aeration. Two cap configurations are available: a vent cap with controlled gas exchange and a seal cap for airtight sample containment, both incorporating a PTFE hydrophobic breathable membrane. The supplier states c-GMP standard production and specifies USP VI medical grade polystyrene raw material, though the primary vessel is borosilicate glass rather than polystyrene, suggesting the PS reference applies to cap components or alternative product lines in their catalogue.

Borosilicate 3.3 glass, the standard material for laboratory Erlenmeyer flasks, contains approximately 80% silica, 13% boron oxide, 4% sodium oxide, and 2% aluminium oxide, yielding a coefficient of thermal expansion near 3.3 x 10^-6 K^-1. This thermal shock resistance allows direct transfer from hot plates to ice baths without fracture, provided temperature differentials remain below approximately 160°C. The 125 ml working volume represents 25% of nominal capacity, a conservative ratio typical for microbial culture applications where oxygen transfer and foam control predominate over maximising liquid throughput. The 39 mm neck diameter accepts standard plug sizes and facilitates aseptic technique with pipettes and inoculation loops.

Primary buyers include pharmaceutical companies conducting cell culture scale-up, biotechnology firms performing seed train expansion, research laboratories running shake-flask fermentation, and hospital or clinical diagnostic labs preparing media batches. The vent cap configuration suits aerobic cultures requiring CO2/O2 exchange, while the seal cap prevents contamination during static incubation or transport. Importing buyers should confirm whether Luoyang Fudau Biotech offers lot-specific certificates of analysis, endotoxin testing, or sterilisation validation, as these are standard requirements for GMP-compliant procurement. The Henan location provides inland manufacturing cost advantages, though buyers should factor in transport logistics to coastal export ports.

Luoyang Fudau Biotech Co. Ltd. operates from Room 101, 3rd Building, No.25 Yuwenkai Street, Luolong District, Luoyang City, Henan Province, China, postal code 471031. The address situates the company in Luoyang's emerging biotech and advanced materials zone, approximately 130 kilometres east of Zhengzhou, Henan's capital and primary logistics hub. The Harbor trust tier indicates basic verification; the zero percent response rate and zero average response hours suggest limited or no engagement through platform-mediated enquiries, directing buyers toward direct email or telephone contact to the Luolong District address.

The listing provides no information about year of establishment, factory floor space, headcount, annual revenue, or client roster. No ISO 9001, ISO 13485, or CE marking certifications are mentioned. The c-GMP claim requires verification through on-site audit or third-party certification body confirmation, as self-declared GMP compliance without external audit carries limited weight in regulated pharmaceutical procurement. The reference to USP VI medical grade polystyrene appears incongruous with a borosilicate glass product; buyers should clarify whether this applies to cap construction, whether alternative all-plastic flasks exist in the catalogue, or whether the description conflates multiple product lines. The PTFE membrane specification for gas exchange represents a genuine technical differentiator if independently validated for porosity and bacterial retention.