Rainin BioClean Ultra pipette tips are certified pure. When using Rainin pipettes, the BioClean Ultra certification provides complete trust in the integrity of the experiment and the accuracy of the results.
BioClean Ultra pipette tips have been tested to extreme detection levels for a wide range of contaminants, including RNase, DNase, pyrogens, and more. They also now confirm the absence of protein and protease, ensuring a solid foundation for proteomics research. The tips do not contain bioactive components, making them inert.
Exceptionally pure, no additives

Image Credit: Mettler Toledo – International
Additives commonly found in virgin polypropylene, such as the detergent DiHEMDA and the releasing agent oleamide, often used by some pipette tip manufacturers, can negatively impact biological reactions.
Rainin BioClean Ultra tips are made without these bioactive substances, ensuring they will not interfere with results. Manufactured from pure virgin polypropylene resin in the form of CFR 21-certified pellets, Rainin tips contain no additives or dyes and are rigorously tested for purity.
BioClean ultra certification

Image Credit: Mettler Toledo – International
Rainin BioClean Ultra tips, including protein and protease, are free of external impurities to assist proteomics research.
Source: Mettler Toledo – International
Contaminants Tested |
Testing Detection Levels |
RNase |
≤ 10-9 Kunitz units/μL |
DNase |
≤ 10-7 Kunitz units/μL |
Human DNA |
< 0.32 pg |
Bacterial DNA |
< 1 pg |
Endotoxins |
< 0.001 EU/ml |
ATP |
< 2 x 10-12 mg/μL |
Protein |
< 2 ng/lane (no visible band) |
Protease |
< 500 ng/mL |
PCR Inhibitors |
None detected |
Trace Materials |
No trace materials |
Trace Organics |
No organic contaminants |
Clean manufacturing and packaging

Image Credit: Mettler Toledo – International
Rainin tips are produced in a Class 100,000 cleanroom. Fully automated material handling method feeds virgin polypropylene material directly into molding machines without needing human interaction. By complying strictly with ISO 9001 manufacturing procedures, all external sources of contamination are removed.