# FDA Warning Letter: Kellin Chemicals Co., Ltd. - Zhangjiagang
> 2026-09-29 · Center for Drug Evaluation and Research (CDER) · `cdde4fb82ebfd05f`
## Letter
- **Company:** Kellin Chemicals Co., Ltd. - Zhangjiagang
- **Posted Date:** 2026-09-29
- **Letter Issue Date:** 2025-11-06
- **Issuing Office:** Center for Drug Evaluation and Research (CDER)
## Subject
CGMP/Active Pharmaceutical Ingredient (API)/Adulterated
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*Source: [FDA Warning Letters](https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/compliance-actions-and-activities/warning-letters) · MORVS · CC0 1.0*