Import 4ml Screw Clear, Amber Vial Lab Glassware — Buy in wholesale FOB from Supplier in China

The 4ml screw vials are Type I borosilicate glass containers designed for secure, contamination-free storage of liquid or powder samples. Each vial has a 4 ml nominal capacity, a screw neck finish for leak-proof sealing, and is supplied in clear or amber glass to shield light-sensitive compounds. The clear variant transmits visible light for visual inspection, while the amber glass filters UV and short-wavelength visible light to protect photo-reactive substances. Both versions are autoclavable at 121 °C and chemically inert to acids, alkalis and most organic solvents.

The vials are manufactured from 3.3 expansion borosilicate glass, a standard material for laboratory containers due to its low thermal expansion and resistance to thermal shock. Typical wall thickness for 4 ml screw vials ranges from 1.0 to 1.2 mm, providing mechanical strength while keeping the container lightweight. The screw cap is usually a polycone or screw-top with a PTFE/silicone liner to ensure a hermetic seal. Industry standards such as ISO 4796-1 define the dimensional tolerances for such vials, with a typical outer diameter of 15 mm and height of 45 mm for 4 ml capacity.

These vials are widely adopted in analytical chemistry, pharmaceutical development and clinical diagnostics for HPLC, GC and sample archiving. Laboratories in China and international importers source them for applications requiring traceability and long-term stability, such as reference standards, biobanking and environmental testing. Buyers typically confirm packaging options (e.g., 100 vials per bag, 500 per carton) and lead times, as these vary by supplier. The vials are compatible with most autosampler racks and can be sterilised by gamma irradiation if required.

Jiangsu Tianning Glass Technology Co., Ltd. is based in Qianai Economic Development Zone, Zhenjiang, Jiangsu Province, China. The company specialises in laboratory glassware, with a focus on precision-manufactured containers for analytical and storage applications. Its facility is located at No.88 Zhenqian Road, Qianai, within the Danyang region, positioning it near key logistics hubs for domestic and international shipping.

The supplier currently holds a harbor trust tier, indicating a baseline level of verification. While its listed response rate is 0%, this may reflect incomplete profile data rather than actual performance. The company’s profile does not specify certifications, production capacity, or export history, so buyers are advised to request these details directly. No additional claims about history, client base, or staff numbers are available from the provided information.