MetalFree® Centrifuge Tubes


MetalFree® Centrifuge Tubes

Our MetalFree® tubes are produced to ensure that key trace metals are kept below one part per billion (1ppb). They can be used for storage and analysis tasks that require extremely low levels of most common metals. These tubes are produced with a proprietary process that virtually eliminates common metals.

Far cleaner than metal free tubes offering a simple 1 part per million (1ppm) certification these tubes are unique. Developed in our own lab and using an Inductively Coupled Plasma Mass Spectroscopy (ICP) system these tubes are free of more than 20 common trace metals to a detection level of 1 part per billion.


Unmatched Purity

Our MetalFree® tubes are not only free of ultra low levels of trace metals. These tubes are also lot tested and certified free of detectable Nuclease, Endotoxin, and ATP contamination.

MetalFree® tubes are available in 15mL, 50mL and sizes in our Patented fiber racks or in Loose bags. Our MetalFree® tubes are also available in a snap cap 1.5mL microcentrifuge tube. All our sterile products use medical grade packaging and are radiation sterilized following a validated ISO 11137 method to a sterility assurance level of 10-6.

Our MetalFree® tubes are made with ultra clean resins for the tube and cap and processed to ensure that common trace metals are kept below an ICP-MS detection level of one part per billion (1ppb). These tubes are perfect for storage of samples and for applications requiring the assurance of low background metals.

Metals Tested

  • Calcium
  • Magnesium
  • Zinc
  • Vanadium
  • Cobalt
  • Lithium
  • Cadmium
  • Iron
  • Manganese
  • Copper
  • Sodium
  • Chromium
  • Lead
  • Mercury
  • Aluminum
  • Silicon
  • Nickel
  • Phosphorus
  • Potassium
  • Selenium
  • Arsenic


All package versions are sterilized with a validated and approved ISO 11137 medical grade method to an SAL of 10-6. Racked tubes are packaged in recyclable fiber racks.

Autoclavable (122°C) with caps attached. Freezable (-80°C).

Endotoxin Endotoxin Free (Non pyrogenic)
Product samples are exposed to endotoxin-free water and the resulting extraction fluid is tested for contamination using the kinetic turbidimetric Limulus Amoebocyte Lysate (LAL) assay protocol and USP guidelines. All products tested must display less than 0.05 EU/ml to be certified free of endotoxin.
RNase/DNase Nuclease Free (RNase/DNase)
Product samples are exposed to nuclease-free water and the resulting extraction fluid is tested for nuclease activity on commercially available 7.5 kb Poly(A) tailed RNA (1µg) and HindIII-digested DNA (1µg) with a one hour 37°C incubation in appropriate buffers. Results are visualized on an agarose gel with appropriate positive and negative controls. Extraction fluid samples must show no degradation of the nucleic acids by the extraction fluid has occurred for the product to be certified as RNase-free and DNase-free
ATP Adenosine Triphosphate (ATP)
Product sample surfaces are tested for the presence of adenosine triphosphate (ATP) using a controlled bioluminescence reaction to detect contamination. Luminescence data is compared to results generated by ATP-free surfaces and surfaces with known amounts of ATP as a positive control. The relative light units result must indicate less than 2 X 10-12 mg/µl of ATP for the product to be certified as ATP free.
USP Metals Heavy Metals Free
Heavy metals have been tested for using the prescribed USP method and confirmed to have levels lower than 1 part per million (1ppm)
Metal Free Metal Free
Our ultra-low metal products are tested with an ICP-MS method to confirm that the following elements fall below 1 part per billion (1ppb): Calcium, Magnesium, Zinc, Iron, Manganese, Copper, Aluminum, Silicon, Nickel, Vanadium, Sodium, Phosphorous, Cobalt, Chromium, Potassium, Lithium, Lead, Selenium, Cadmium, Mercury, and Arsenic.
Sterilization Validated Sterilization
Labcon products are sterilized by radiation sterilization within a dose range of 12-35 kGy. The dose range necessary for the stated sterility assurance level is continuously audited through quarterly bio-burden and sterility validation studies performed according to the ANSI/AAMI/ISO 11137 standard by an independent laboratory. This dosage is sufficient to guarantee a sterility assurance level of 10-6.
BSE/TSE Bovine Spongiform Encephalopathy-Transmissible Spongiform Encephalopathy
These products contain resins that are processed under conditions proven to exceed the European Union standard as listed in the 22nd Commission Directive EC 98/16/EC of March 5th, 1998 as annexed to council Directive EC 76/768/EEC and further Amendment 419 Annex II of 12 June 2001.
USP Medical Grade (USP)
U.S Pharmacoepia Methods and Guidelines (U.S.P Class VI) are used if applicable. We only use medical grade resins and pre-test all resins for contaminants prior to use. Resins are compliant with FDA CFR title 21-177.1520, 178.3295, 178.3297.
Prop 65 California Prop 65
No Labcon manufactured disposables contain any of the “listed chemicals” as referenced in the California Safe Drinking Water and Toxic Enforcement Act of 1986, (Prop 65) as revised May 25, 2018.
Phthalates Phthalates & Oleamide
All our resins are medical grade and are certified free of Bisphenol A (BPA), Oleamide, DiHEMDA, and Phthalates.
SVHC Substances of Very High Concern & REACH
All Labcon products are compliant with RoHS Directive 2002/95/EC/-2011/65-2015/863, are free of Substances of Very High Concern (SVHC), and are EU REACH Regulation (EC) No 1907/2006 compliant.
USA Origin
These products are Made in USA and all components meet the requirements for US origin under the NAFTA agreement.
FDA U.S. FDA Registered
Labcon is a U.S. FDA registered medical device manufacturer. Our facility is registered by the U.S. government to comply with CFR21 GMP regulations for manufacturing medical devices.
CE CE Compliant
As applicable Labcon products meet the requirements for CE marking under regulation 2017/746.
ISO ISO 9001 Quality Registration
Labcon has been registered to the ISO 9001 quality management system standar since 1997 and maintains registration to ISO 9001:2015.
Material Proprietary Virgin Polypropylene
Grade Medical
Rating USP Class VI
Colors Amber
Length Various
Fits Most popular centrifuges
Approved Use Medical, Research, Industrial, Food & Beverage
Lot Expiration 4 years
Sterile Expiration 3 years
Loose Pack

Loose pack tubes are supplied in heavy duty medical grade polyethylene bags. These have an easy open tear strip that you can open even with gloves. Available sterlized by irradiation.

Fiber Racks
Fiber Rack

These patented collapsable recyclable fiber racks hold 25 tubes and can be recycled like standard cardboard. The clean SBS material is printed with numbers at each well for ease of use. A view port in the ends allows you to see the fluid volume when filling one tube. Available sterilized by irradiation.

FDA Registered

Labcon is registered by the U.S. Food and Drug Administration to manufacture medical devices.

Medical Grade Resins

Only 100% Medical Grade virgin polypropylene resins are used in MetalFree™ Tubes. No recycled plastics or commodity grade resins.

Lab Tested

MetalFree™ tubes are developed using our own in-house laboratory and tested in real centrifuges. We use actual lab results.

Certified Quality

Our products are made to ISO standards and we are audited every 6 months to ensure you continous quality.

Certificates Online

Real test certificates are available by lot for MetalFree™ tubes for you to download from the certificates page.

Sustainability Built In

MetalFree™ are designed from the beginning with sustainability in mind. Beyond simple recycling to real solutions.