Glass Dropping Bottles with Rubber Bulb

Glass Dropping Bottles with Rubber Bulb

Borosilicate glass dropping bottles with red rubber bulb, glass dropper pipette, and ground-fit stopper, designed for precise drop-by-drop dispensing of indicators, stains, reagents, and other laboratory solutions. The three-piece dropper assembly – comprising a rubber bulb, ground glass stopper, and glass capillary pipette – provides controlled, consistent drop delivery and a secure, leak-resistant seal when not in use. The borosilicate glass body (SiO2 >=75%) provides excellent chemical resistance, high thermal stability, and durability across a wide range of laboratory reagents. Clear bottles offer maximum visibility of contents; amber bottles block UV and visible light to protect light-sensitive reagents such as iodine solution, silver nitrate, and photosensitive indicators from degradation. Wide-mouth opening allows easy filling and cleaning. Suitable for chemistry, biology, and environmental laboratories, as well as science education.

COMMON APPLICATIONS: Dispensing pH indicators, stains, and colorimetric reagents; iodine and silver nitrate dispensing (amber); titration setup; biology and histology staining; general bench-top reagent dispensing in chemistry and biology labs.

USAGE NOTES: Stopper should be seated firmly before storage to prevent evaporation. Do not apply force to remove a stuck stopper – loosen gently by rotation. Replace rubber bulb if it shows signs of cracking or hardening. Not recommended for highly concentrated oxidizing acids or aromatic solvents that may degrade the rubber bulb. Amber bottles recommended for all light-sensitive reagents.