Medicinal glass refers to the glass specially used for drug packaging, generally refers to glass bottles and containers.
Medicinal glass refers to the glass specially used for drug packaging, generally refers to glass bottles and containers. According to the glass material, it can be divided into soda-lime glass and borosilicate glass. According to the manufacturing process, it can be divided into moulding bottle, control bottle and ampoule. Chemical property is one of the important criteria to measure the quality of medicinal glass, and the important parameter is linear thermal expansion coefficient. Does long-term storage of drugs reflect glass? According to the coefficient of linear thermal expansion, medicinal glasses are classified accordingly. International Standard ISO 12775 - 1997 "Classification of Normally Mass Produced Glass by Composition and Test Method" classifies medicinal glass into three categories:
= 1 GB2 3.3 borosilicate glass
The linear thermal expansion coefficient of the glass is as follows: a=(3.3+0.1)*10(-6) K(-1) (20-300 C). The chemical composition of the glass is as follows:
SiO 2 81%, B2O 312 13%, R2O 4%, AlO 3 2 3%.
= 2 GB2 neutral glass
The linear thermal expansion coefficient of this glass is: a=(4-5)*10(-6) K(-1) (20-300 C). Its chemical composition is as follows:
SiO 2_75% B2O 3 8-12% R2O 4-8% RO < 5% Al2O3 2-7%.
= 3 GB2 soda-lime glass
The linear thermal expansion coefficient of the glass is as follows: a=(8-10)*10(-6) K(-1) (20-300 C). Its chemical composition is as follows:
SiO 2 70-75% R2O 12-16% RO 10-15% AlO 3 0.5-2.5%
