We would like to inform you today about a specific detail regarding Batch 01/25 of SR-17018 HCL. During processing in our laboratory, we discovered that in rare cases there may be minimal residues of filter fibers. These originate from a Sigma Aldrich laboratory filter used during the final preparation of the material.
What does this mean in practice?
The filters used are specifically designed for chemical and pharmaceutical laboratory operations. They consist of high-purity, chemically inert materials (e.g. glass fiber or cellulose acetate) that do not react with the product. Such filters are toxicologically safe and are an international laboratory standard. Therefore, should a single fiber remain in the material, it has no impact on the safety, stability, or purity of the product.
Our measures
- The batch has been subjected to multiple internal checks and was re-filtered.
- The purity remains at >99.98%, confirmed by our analyses.
- So far, we have received no negative feedback from customers.
Our recommendation
We recommend that you visually inspect the material before your research. If individual fibers are visible, they can be easily removed mechanically (e.g. with tweezers or by re-filtering). This is solely a precautionary measure to support your own quality assurance.
Your options
If you are not satisfied with Batch 01/25, we offer the following solutions:
- 100% refund of the purchase price – this applies exclusively to orders placed before the publication of this article
- Free re-ship with Batch 02/25 (availability will be announced)
Please note: A refund is only possible if your order was placed before today’s announcement (04 September 2025). For all future orders, Batch 01/25 is considered compliant and fully usable.
We share this notice in the interest of transparency and quality assurance, as it is our commitment to consistently provide the highest possible product quality.
Thank you for your understanding and trust.
Frequently Asked Questions (FAQ)
Are the filter fibers dangerous?
No. The fibers come from Sigma Aldrich and consist of glass fiber or cellulose acetate. These materials are toxicologically safe and do not react with the product.
Do the fibers affect purity or research results?
No. The purity of Batch 01/25 is >99.98% and has been confirmed through analyses. Individual fibers have no impact on chemical stability or research results. A visual check is recommended only as a precaution.
How can I detect and remove the fibers?
The fibers are small, whitish to transparent, and can be identified by careful visual inspection. They can be easily removed mechanically, e.g. with tweezers or by re-filtering.
How do I request a refund or re-ship?
Please contact our support team with your order number. A 100% refund is only possible if your order was placed before the publication of this article. Alternatively, you may choose a free re-ship with Batch 02/25 once available.
When will Batch 02/25 be available?
A specific date is not yet confirmed. We will inform you in advance via our News page as soon as Batch 02/25 becomes available.