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Canary-Safe™ Solvent Safety Products


Mobile Phase Bottle Safety Caps

Laboratory safety is very important to Analytical Sales and Services, Inc. Our mobile phase screw caps are made from high quality polypropylene with machined PTFE centers. Tubing lines are held in place with secure finger tight fittings, and will no longer become tangled upon removal of the cap because of the 2-part design (threaded portion spins independently of the center). There is an additional O-ring between the Teflon center and cap surface to ensure no evaporation. All mobile phase screw caps come with replaceable air check valves. Safety caps are available in GL38, GL45, S55, and B83 threads.

Call us to design your custom mobile phase cap, at no extra charge.

Diagram: How Mobile Phase Safety Caps Function Expand
Container Thread Dimensions Guide Expand
Diagram: How Mobile Phase Safety Caps Function
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Container Thread Dimensions Guide Expand
Mobile Phase Bottle
Safety Caps
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Container Thread
Dimensions Guide




Cap AD (mm)Note
GL32 31.5 
GL38 37.5 for Wheaton and Nalgene bottles
GL40 40 for Merck bottles
GL45 44.5  
B50 50 for space saving can
B51 48  
B53 53 for Nalgene bottles and cans
S55 53.5  
S60 59  
B63 62 for Nalgene bottles and cans
S65 64.5 for KAUTEX cans
S71 70  
GL80 80  
B83 88 for Nalgene bottles and cans
(approx. 13mm thread lead)
S90 88  
S95 94  

Note: All dimensions could very +/- 0.5mm depending on the manufacturer.


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GL45 Mobile Phase Caps

We offer a wide range of options for GL45 caps, including custom port sizes for various sized tubing and several color options so that you can easily identify your solvent...

GL38 Mobile Phase Caps

Our GL38 mobile phase safety caps are direct replacements to solvent manufacturer’s amber solvent bottle caps, and require no additional adapters. Available in a wide...

B83 Mobile Phase Caps

As it is with our other mobile phase safety caps, our B83 caps are available in custom formats, per your request!

S55 Mobile Phase Caps

Our S55 mobile phase safety caps for large solvent containers are also made for large waste containers. They are available with ports for 1/16”, 1/8” and 1/4” OD...

S55 Caps with Prep Size Air Filter

Our S55 mobile phase safety caps can be used with prep sized air check valves, specially adapted for large volumes of preparative HPLC eluents.  These caps and air check...