Narrow neck Erlenmeyer flask EFN3-250-012
Product: Erlenmeyer flask, narrow neck
Description: Graduated. Made of borosilicate glass LBG 3.3. According to DIN 12380, ISO 1773
PACKING Type: Carboard box
LBG 3.3 is a borosilicate glass with a minimum content in silica of 80% and a low expansion coefficient (3.3•10-6 K-1) included in the 3.3 borosilicate group, as defined in ISO 3585 standard.
It is used in products where chemical and mechanical resistance is to be combined with resistance to sudden temperature changes.
This particular combination of properties makes this type of glass the most used in labware.
Physical and chemical properties
Linear expansion coefficient (@ 20/300 ºC): 3.3•10-6 K-1
Strain point: 520 ºC
Annealing point: 560 ± 10 ºC
Softening point: 820 ± 10 ºC
Density: 2.23 ± 0.02 g/cm3
Hydrolytic resistance (according to ISO 719, water at 98 ºC): Class 1
Hydrolytic resistance (according to ISO 720, water at 121 ºC): Class 1
Resistance to acids (according to ISO 1776, DIN 12116): Class 1
Resistance to alkalis (according to ISO 695): Class 2
80.4% in weight SiO2
13.0% in weight B2O3
4.2% in weight Na2O
2.4% in weight Al2O3