Overview
The sterile Erlenmeyer flask is a cornerstone of laboratory work, engineered to maintain aseptic conditions for sensitive procedures. Its conical shape allows efficient mixing and reduces spillage, while the narrow neck supports cotton plugs or vented caps. Commonly manufactured from borosilicate glass (e.g., Pyrex) or sterilizable plastics like polycarbonate, these flasks are pre-sterilized via gamma irradiation or autoclaving, ensuring readiness for cell cultures or reagent storage. In B2B contexts, bulk purchases often include customized options such as threaded necks, baffled bases for aeration, or specific graduation markings. Compliance with ISO 13485 or USP Class VI standards is critical for pharmaceutical applications.
Physical and Chemical Properties
Borosilicate glass variants exhibit high thermal resistance (withstand ~500°C) and low thermal expansion, minimizing breakage during autoclaving. Plastic versions, such as polystyrene, offer shatterproof alternatives but may have lower chemical compatibility. Both types are inert to most acids, bases, and solvents, though hydrofluoric acid attacks glass. Sterility is maintained through airtight packaging, typically verified by batch-specific certificates. The flasks often feature precise graduations (±5% accuracy) and matte labeling areas for sample tracking. Weight varies by capacity, with 250 mL glass flasks weighing ~200 g.
Main Applications
Primary uses include microbial fermentation, where the flask’s aeration efficiency is vital for aerobic cultures. Biotech labs employ them for monoclonal antibody production or plasmid DNA amplification. In pharmaceuticals, they prepare sterile media or buffer solutions. Industrial applications extend to quality control testing in food and beverage sectors, ensuring batch consistency. Recent trends include single-use bioreactors integrating sensor ports, though traditional Erlenmeyer designs remain cost-effective for small-scale R&D.
Safety and Storage
Pre-use inspections should check for cracks or compromised seals. Glass flasks require careful handling to avoid implosion during vacuum filtration. Autoclaving cycles must not exceed manufacturer-recommended pressures (typically 121°C at 15 psi). Storage involves keeping flasks in original packaging until use to prevent particulate contamination. Plastic versions may degrade under UV light, necessitating opaque wrappings. Spent flasks with biohazardous contents require decontamination before disposal per local regulations.
B2B Procurement Guide
For bulk procurement, prioritize suppliers offering ISO-certified sterilization validation. Key specifications include: volume tolerance (±2% for precision work), closure type (screw cap vs. snap-on), and compatibility with automated filling systems. MOQs typically start at 100 units, with discounts for 1,000+ orders. Emerging markets favor eco-friendly options like reusable glass flasks with silicone sleeves. For high-throughput labs, consider pre-assembled kits with filters or vented caps. Lead times vary from 2 weeks (stock items) to 8 weeks (custom engraving).
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