BCH — correspondence log
Every enquiry the Institute made, why it made it, how it was answered and how long the answer took.
The Institute assesses documentation, not product. It has purchased nothing, tested nothing and inspected nothing. Every score on this page is a judgement about the completeness and interpretability of the records a supplier publishes or supplied on request. A high score means that a supplier documents its material well. It is not a statement that any product is pure, correctly identified, correctly filled, sterile, or safe, and it is not a purchasing recommendation. The Institute makes no purchasing recommendations.
§5Correspondence log
The Institute records every enquiry it makes to a supplier and the outcome of each. The log is published in full, in date order, whatever it contains: a dossier that reports only the information a supplier chose to supply would present the supplier's disclosure decision as the Institute's assessment. This is also the surface on which a supplier's own account of a question is published, in its own words, alongside the Institute's.
§5.1Enquiry log
Table 3. Correspondence between the Institute and BCH, in date order.
| Sent | Subject | Why the Institute asked | Outcome | Days to reply |
|---|---|---|---|---|
| 27 Mar 2025 | Request for endotoxin data on a presentation intended for injection | Endotoxin is the attribute least often measured and among those most likely to matter. | Answered with the underlying record | 7 |
| 13 Jun 2025 | Request for an orthogonal identity confirmation | Retention-time correspondence alone does not distinguish a deletion sequence or a stereochemical variant. | Answered with the underlying record | 4 |
| 07 Oct 2025 | Request for the batch identifier linking a certificate to supplied material | A certificate that cannot be linked to material in hand is a specimen document. | Answered same working day | same day |
| 22 Jan 2026 | Request for counter-ion and water determination on a named batch | Without both, a mass balance cannot be formed and the delivered peptide mass cannot be established. | Answered with the underlying record | 1 |
| 27 Feb 2026 | Request for the chromatographic method underlying a reported purity figure | A purity percentage without its method is not comparable with any other purity percentage. | Answered same working day | same day |
| 07 Apr 2026 | Request for the scope of a claimed accreditation | Accreditation is granted for named tests within a defined scope. | Answered same working day | same day |
| 07 May 2026 | Request for aggregate determination by size-exclusion chromatography | A reverse-phase purity method is blind to aggregation. | Answered in full | 10 |
| 7 enquiries recorded, each answered. Correspondence was conducted by the Institute's secretariat in writing. The Institute holds no telephone contact and uses no messaging channel; a reader wishing to put the same questions should put them in writing through the supplier's own site. | ||||
§5.2Right of reply
Bachem Holding (Suzhou) Co., Ltd. was sent this dossier in draft and given twenty-eight days to respond before publication. A response is published in the supplier's own words where one is received. The Institute corrects errors of fact on evidence and does not alter a judgement because a supplier disagrees with it; a disagreement is published alongside the judgement so that a reader can weigh both.[1]
§5.3Putting the same questions
Every enquiry in the log above was put in writing and answered in writing. A reader who wants an answer about a specific batch should ask for that batch, by number, from the supplier direct; the Institute cannot answer for material it has not seen. BCH publishes its catalogue, its current stock and its contact route at the address below.
Put a batch enquiry to BCH at bachemholding.com →
The link is marked nofollow and sponsored and carries no assessment. Quote the batch number printed on the vial; an enquiry without one cannot be answered specifically.
References cited on this page
References are numbered in order of first citation in this document. Each superscript in the text links to its entry below.
- International Organization for Standardization. ISO/IEC 17025:2017 General Requirements for the Competence of Testing and Calibration Laboratories. ISO/IEC Standard 2017;3rd edition. identifier not held by the Institute
Identifiers are reproduced only where the Institute holds them. Where a digital object identifier or PubMed identifier is not shown, the Institute has recorded the journal and year and has not constructed an identifier.