Description

Catalogue No.	Capacity ml	Height x OD mm
11204/1	5	100 X 12
11204/2	10	125 X 16
11204/3	25	150 X 22
11204/4	50	200 X 25

The  Test Tube with Interchangeable Stopper and Graduations is a precision-engineered laboratory tube designed for accurate measurement, secure sample storage, and reliable experimental handling. The integrated graduations allow quick volume estimation, while the standard interchangeable stopper ensures leak-proof sealing for transport, incubation, or chemical storage. Its robust construction makes it ideal for routine and analytical applications across research labs, universities, pharma, biotech, and QC/QA laboratories.

Key Features

• Interchangeable Ground-Glass Stopper for tight, contamination-free sealing.
• Graduated Scale for easy visual volume reading and improved workflow efficiency.
• Precision-Built Borosilicate Glass 3.3 offering exceptional thermal and chemical resistance.
• Smooth, Rounded Rim for safe handling and reduced chipping risk.
• Heat-, flame-, & Chemical Resistant ideal for heating, mixing, and storage tasks.
• Uniform Wall Thickness ensures mechanical strength and consistent performance.
• Autoclavable without deformation or staining.
• Reusable Laboratory-Grade Construction reduces long-term operating costs.

Material Specifications

• Material: Borosilicate Glass 3.3
• Properties: High thermal resistance (low coefficient of expansion 3.3 × 10⁻⁶ /°C), excellent chemical durability against acids, alkalis, and solvents, high mechanical strength and scratch resistance
• Standards: Manufactured according to laboratory glassware standards for dimensional accuracy and durability.

Technical Specifications

• Available Capacities: As per the standard size table
• Dimensions: Varies by capacity; typically includes consistent outer diameter, length, and graduation spacing for laboratory compatibility.
• Graduation Accuracy: Clear, permanent, easy-to-read graduations with controlled tolerance as per international standards.
• Stopper: Interchangeable ground-glass stopper (standard taper).
• Calibration: Non-calibrated; graduation marks for approximate measurements.
• Accessories Included: A matching interchangeable stopper is supplied with each tube.

Handling & Precautions

• Safe Use: Avoid sudden temperature changes to prevent thermal shock.
• Cleaning: Wash with mild detergents; fully rinse to remove residues.
• Autoclaving: Autoclavable at standard temperatures (121–134°C). Always loosen the stopper before autoclaving.
• Heating Limits: Suitable for direct flame exposure, water baths, and dry heating within glass limits.
• Dos: Inspect for cracks before use. Store upright to protect the stopper and rim
• Don’ts: Do not expose to strong mechanical impacts. Do not tighten the stopper during heating or sterilisation
• Best Practices: Replace worn or chipped stoppers. Use proper tube holders and clamps when heating

Applications

• Ideal for sample collection, storage, mixing, heating, and reactions.
• Widely used in pharmaceutical QC/QA labs, chemical industries, microbiology labs, environmental testing centres, and educational institutions.
• Suitable for culture preparation, reagent holding, qualitative tests, titration work, and small-volume reactions.
• An essential part of routine workflows in analytical chemistry, biotechnology, clinical research, R&D, and academic laboratories.