• 140/280 per pack capillary tubes, 1.3-1.5mm inner diameter, 1.6-1.8mm outer diameter, 100mm length. Good for preparative TLC spotting.

• As shown in photos, approximate spotting volume as tested for dichloromethane is 8mm x (0.7mm)2 x 3.14 = 12µL, for acetone is 13mm x (0.7mm)2 3.14 = 20µL, and for water is 25mm x (0.7mm)2 x 3.14 = 38µL.

• Testing method used is dipping the tube into the liquid at an angle, allowing the liquid to climb as much as possible, and then turning the tube to point straight down in the air.

• Upgraded convenient packaging with 3mm diameter hole on cap for easy tube drawing without need to open the cap or keeping it open all the time.

• Free shipping from Wisconsin. We ship the next business day, and you will receive the item in 2-4 days with USPS first class.


Visit our storefront or click below for more sizes and quantity:
Extra thin 0.2-0.25mm x 100mm tubes: 500 or 1500/pk
0.3mm x 100mm tubes: 500 or 1500/pk 
0.5mm x 100mm tubes:  500 or 1000/pk 
1.4mm x 100mm large capillary tubes: 280 or 140/pk 
1.4mm x 100mm melting point tubes:  280 or 140/pk
Custom orders welcome, please send us a message to get a quote.

8.625% sales tax for NY orders.