Use and properties of the KIMAX Laboratory Bottle

November 2, 2021

The Kimax brand model 14395 series of laboratory flasks are designed with high quality, strong and durable borosilicate glass, manufactured with 33 low expansion, low extraction borosilicate glasses that meet the requirements of USP Type I and ASTM E438, Type I, Class A, as well as the printing of the graduation of each bottle, are made of chemically resistant white enamel that ensures a high duration of the printing. They come in different capacity presentations, from 100ml to 2L.

These flasks have a wide variety of uses inside and outside the chemical field, ready to house different types of liquids, ideal for general and laboratory use, including mixing, storing or transporting culture media, chemicals such as solvents or reagents, preserving them in the safest way, thanks to your model GL45 screw cap with an internal diameter of 30mm and a replaceable polypropylene ring that can be sterilized in an autoclave at 140 °, they completely seal the bottle, avoiding spillage of the content when the bottle will turn over.

The  borosilicate glass  is manufactured by replacing large amounts of alkali and often all lime, with B2O3. Although the latter product is a network former (and not a substituent modifier), it also reacts with SiO2, in much the same way as sodium and lime, which are modifiers.

The raw material is borax (sodium tetrabotrate), which when heated gives boron trioxide. The use of B2O3 reduces the coefficient of expansion, which is why the  resistance  of these glasses to  thermal shocks  is much higher than that of soda-lime. Furthermore, reducing the amount of alkalis present makes the non-reactivity of said glass better. It complies with the main international standards for laboratory use, being  suitable for heating even with a flame .


The special properties of borosilicate 3.3 glass used exclusively for QVF® glass components for the construction of glass plants and pipes are achieved with strict compliance with its chemical composition, which is as follows:


Borosilicate glass 3.3 is resistant against chemical attack by almost all products, which makes its resistance much more complete than that of other well-known materials. It is highly resistant against deionized water, saline solutions, halogens such as chlorine and bromine and almost all acids. There are only a few chemicals that can cause noticeable corrosion of the glass surface, namely hydrofluoric acid, concentrated phosphoric acid, and strong caustic solutions at high temperatures. In any case caustic solutions up to a concentration of 30% can be handled with borosilicate glass without difficulty Borosilicate glass 3.3 can be classified according to the relevant test methods as follows (see also ISO 3585 and EN 1595 ):

Hydrolytic resistance at 98ºCHydrolytic resistance, particle size class ISO 719-HGb 1
Hydrolytic resistance at 121ºCHydrolytic resistance granulometry class ISO 720-HGA 1
Resistance against acidNa2O deposit <100 mg / dm² at ISO 1776
Alkaline resistanceAlkaline resistance class ISO 695-A2


Borosilicate glass 3.3. It differs from other construction materials used for process plants not only by its virtually universal resistance against corrosion (see above), but also by its very low coefficient of thermal expansion. Therefore, there is no need for expensive measurements to compensate for the thermal expansion that results from temperature changes. This is particularly significant for the design of long runs of glass pipes.

The most important physical properties for plant construction are listed below (see also ISO 3585 and EN 1595).

Linear coefficient of thermal expansiona 20/300=(3,3 ± 0,1) x 10-6 K-1
Thermal conductivity between 20 and 200ºCl 20/200=1,2 W m-1 K-1
Specific heating capacity between 20 and 100ºCCp 20/100=0.8 kJ kg -1  K -1
Specific heating capacity between 20 and 200ºCCp 20/200=0.9 kJ kg -1  K -1
Density at 20ºCr=2,23 kg dm-³

Other uses

Kitchen utensil :  It is commonly used as a kitchen utensil, and very commonly in solar heaters. Sometimes it has imprinted marks as graduated measurements. Borosilicate glass is very resistant, it can be used in the microwave, oven and dishwasher.

3D printing :  Some 3D printers use it as a printing base for a more detailed quality on the bottom of the part.

Smoking pipes :  Another known use of this material is for the manufacture of smoking pipes.

Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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