We use cookies to give users the best content and online experience. By clicking “Accept All Cookies”, you agree to allow us to use all cookies. Visit our Privacy Policy to learn more.

Manage Cookies
Resources for Businesses My BBB
Share
Business Profile

Chemicals

Sigma-Aldrich Corp

This business is NOT BBB Accredited.

Find BBB Accredited Businesses in Chemicals.

Reviews

Customer Review Ratings

1

Average of 1 Customer Review

Want to share your experience?

Leave a Review

Review Details

  • Sameh A

    Date: 07/31/2023

    I am a researcher working at the ************************** ***** but used to work in *****, *******, and ***************** for most of my academic career. Our work utilizes a spin trap called ******************************** (DMPO); a fine and expensive reagent that I have extensive experience working with it as my publications indicate. Over the past few years, we have received DMPO with variable amounts of stable free-radical contamination. The presence of this contamination leads to redox cycling and ruins our experiments. We have indicated this to the local vendor/agent who has contacted the company with our complaint and evidence of contamination. We received no resolution to the issue. Thousands of dollars are wasted over disrupted experiments with tens of thousands of dollars wasted due to wasted efforts and times that yielded doubtful results.We are very frustrated not only because of money and time wasted over a very simple right: obtain a pure reagent!!!; but also due to ignoring our repeated complaints!!Since we have no other ways to assess free radicals experimentally, and our samples are obtained from human samples and animals after being groomed for a very long time and at particular conditions; the bad DMPO batches led to huge financial, efforts, and time losses. This cannot be acceptable, especially from a reputable company like the vendor.We have been complaining about this for several months without any satisfying answers. In fact, we just received a different batch (EGP ******) and were shocked by the huge amount of impurities as evident in the dark orange color of the reagent and the *** signal (given in a report filed to the local agent and company). This again will hamper our ongoing projects and will certainly affect our results negatively.It is really sad that I have never encountered such a problem during my long tenure working in the U.S., *****, and Europe. This can only be explained in terms of destination-based discrimination!

Sigma-Aldrich Corp is NOT a BBB Accredited Business.

To become accredited, a business must agree to BBB Standards for Trust and pass BBB's vetting process.

Why choose a BBB Accredited Business?

BBB Business Profiles may not be reproduced for sales or promotional purposes.

BBB Business Profiles are provided solely to assist you in exercising your own best judgment. BBB asks third parties who publish complaints, reviews and/or responses on this website to affirm that the information provided is accurate. However, BBB does not verify the accuracy of information provided by third parties, and does not guarantee the accuracy of any information in Business Profiles.

When considering complaint information, please take into account the company's size and volume of transactions, and understand that the nature of complaints and a firm's responses to them are often more important than the number of complaints.

BBB Business Profiles generally cover a three-year reporting period, except for customer reviews. Customer reviews posted prior to July 5, 2024, will no longer be published when they reach three years from their submission date. Customer reviews posted on/after July 5, 2024, will be published indefinitely unless otherwise voluntarily retracted by the user who submitted the content, or BBB no longer believes the review is authentic. BBB Business Profiles are subject to change at any time. If you choose to do business with this company, please let them know that you checked their record with BBB.

As a matter of policy, BBB does not endorse any product, service or business. Businesses are under no obligation to seek BBB accreditation, and some businesses are not accredited because they have not sought BBB accreditation. BBB charges a fee for BBB Accreditation. This fee supports BBB's efforts to fulfill its mission of advancing marketplace trust.