Overview
Glass beakers are cylindrical containers with flat bottoms, a spout, and graduated volume markings. They are indispensable in laboratories for tasks ranging from simple liquid storage to complex chemical reactions. Their transparent design allows for easy observation of contents. Standard sizes range from 50 mL to several liters, with the most common being 250 mL and 500 mL. Beakers may have Griffin (low-form) or Berzelius (tall-form) designs, catering to different handling needs.
Structure and Working Principle
A beaker's structure consists of three key components: the body for containing liquids, the spout for controlled pouring, and the graduated markings for approximate volume measurement. The flat base ensures stability on lab surfaces or hot plates. Borosilicate glass (e.g., Pyrex) is the preferred material due to its low thermal expansion coefficient, enabling resistance to cracking under rapid temperature changes. Some beakers include reinforced rims for added durability during stirring.
Key Features
Heat resistance is the standout feature, with borosilicate beakers tolerating temperatures up to 400°C. The material also resists chemical corrosion from acids and bases, though hydrofluoric acid and strong alkalis may cause etching. Graduations provide measurement accuracy typically within ±5%. Spouts enable spill-free pouring, while some models include lids or PTFE coatings for specialized applications. Autoclavability makes them reusable in sterile environments.
Application Areas
Beakers serve across scientific disciplines: in chemistry labs for solution preparation, in biology for media mixing, and in education for demonstration experiments. Industrial uses include small-batch processing in pharmaceuticals and food testing. They're also employed in quality control procedures and environmental testing. Specialty beakers with extra-thick walls or handle attachments cater to specific industrial workflows requiring enhanced safety or ergonomics.
Maintenance and Precautions
Proper care extends a beaker's lifespan. Avoid abrupt temperature changes (e.g., placing a hot beaker on cold surfaces). Clean with appropriate brushes to prevent scratching, and use plastic-coated stirrers with glass beakers. Inspect for chips or cracks before each use, as compromised glass may shatter under stress. For heating, use wire gauze to distribute heat evenly and never heat a beaker that's more than two-thirds full to prevent boiling over.
B2B Procurement Guide
When sourcing beakers wholesale, verify ISO 4797 or ASTM E960 compliance for quality assurance. Bulk purchases (typically 12+ units) often attract 15–30% discounts. Consider supplier certifications like ISO 13485 for medical-grade applications. Lead times vary: standard sizes are usually stock items, while custom-marked or coated beakers may require 4–6 weeks. MOQs commonly start at 100 units for generic products. For international shipments, ensure proper packaging to prevent breakage—double boxing with cushioning is recommended.
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