Globe Glass™ Erlenmeyer flasks meet ASTM E1404 specifications for narrow mouth, wide mouth and screw cap options and are available in a wide range of sizes.  Wide mouth conical flasks allow easy access to contents, while screw cap conical flasks include a GL45 cap with a PTFE liner for a leak resistant closure.  Globe Glass narrow and wide mouth Erlenmeyer flasks are designed with reinforced, beaded rims for strength and resistance to chipping.

Features

• Borosilicate glass for low coefficient of thermal expansion provides exceptional resistance to thermal shock,
• High resistance to chemicals,
• Uniform wall thickness,
• Single metric scale graduations,
• Durable white enamel printing,
• Large white marking area,

Specifications

• PTFE lined GL 45 polyethylene (PE) screw cap,

• Chemical Composition – Low alkali borosilicate glass typically composed of 81% SiO2, 13% B2O3, and 4% Na2O.
• Optical Properties – Appears colorless and shows no noticeable absorption of light in the visible spectrum.
• Chemical Resistance
• Highly resistant to water, neutral and acid solutions, concentrated acids and their solutions, as well as bromine, chlorine, iodine, and organic matter, 
• Avoid use with hydrofluoric acid, very hot phosphoric acid, and alkaline solutions which will attack this glass.
• Thermal Properties:
• Coefficient of Linear Expansion: 32.5 x 10-7 cm/cm/°C
• Strain Point: 515°C
• Annealing Point: 565°C
• Softening Point: 820°C
• Specific Heat: 0.2
• Thermal Conductivity: 0.0027 Cal/cm3/°C/Sec.