Glass Florence Boiling Flasks

Flat bottom florence (boiling) flasks, lab safe heat resistant glass, great for juice decanters, vases, terrariums; from $6.50 or save BIG on box lots.

Click on the Tabs below for more information.

Click on the Technical Tab below for Returns & Warranty related issues.

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Displaying 1 to 7 (of 7 products) Result Pages:  1 
  • 100ml Boiling Flask
    SKU: 55241 $5.50USD or lower
    100ml Boiling Flask
  • 250ml Florence Boiling Flask
    SKU: 55242 $6.50USD or lower
    250ml Florence Boiling Flask
  • 500ml Florence Boiling Flask
    SKU: 55243 $7.50USD or lower
    500ml Florence Boiling Flask
  • 1000ml Florence Boiling Flask
    SKU: 55244 $11.00USD or lower
    1000ml Florence Boiling Flask
  • 2000ml Florence Boiling Flask
    SKU: 55245 $28.00USD or lower
    2000ml Florence Boiling Flask
  • 5000ml Florence Boiling Flask
    SKU: 55246 $40.00USD or lower
    5000ml Florence Boiling Flask
  • 10000ml Florence Boiling Flask
    SKU: 55247 $125.00USD or lower
    10000ml Florence Boiling Flask

Displaying 1 to 7 (of 7 products) Result Pages:  1 

No Glassware Returns

Glassware cannot be returned for any reason; this is for your safety and ours. It would be prohibitively expensive to test for bacteriological, chemical or radiological agents since there is no way to tell if glass has been contaminated just by looking at it. We would have to throw it away even if you claim to never have opened the package.Call first if you are unsure of what you need.

If the item is clearly defective, either heavily bubbled, chipped or with really bad markings, send us an image & we will refund you.

Safety Disclaimer-Warning

Handle glassware with care & wear goggles & gloves because:

  1. Unless you poured it yourself, assume any liquid is hazardous.
  2. Hot & cold glass looks the same & does not have to be red to cause burns. Unless it was in the freezer, assume it is hot.
  3. Borosilicate glass will withstand a fair degree of thermal shock but unless your intent is to see if you can make it crack, don't toss recently heated glass into a cold water bath.
  4. When borosilicate glass breaks, it makes sharp edges like any other kind of glass. Dispose of pieces carefully.


Glassware Specifications in Metric Units.    ~25mm/;  25ml/fl. oz.;  25g/oz.
Volume (ml) Height (mm) Diameter-Neck (mm) Diameter-Widest (mm) Weight (g)
50 95±1 24±1 51±1 45±8
100 105±1 24±1 72±1 70±10
250 140±1.5 34±1 85±1.5 120±15
500 170±2 34±1.5 105±1.5 200±20
1000 200±2.5 40±1.5 131±1.5 260±25
2000 250±2.5 50±1.5 167±2 490±40
5000 340±3 60±1.5 223±2 1000±50
10000 400±4 65±1.5 285±3 1900±200


  • linear coefficient of expansion 20-300C: 32.0+/-1.5 x 10-7
  • annealing point 560C+/-10
  • softening point 820C +/-10
  • density 2.23+/-0.02g/cm3
  • The diameter & height does not include the rim (~3-4mm).
  • The thickness increases from the sides to the bottom.
  • 50 & 100ml available on special order