Suzhou Pharmaceutical Technology Co., Ltd. (China) supplies Tofacitinib Citrate API CAS 540737-29-9 for pharmaceutical B2B procurement — COA, MSDS, and technical documentation available on request.
> Tofacitinib Citrate API — Overview
Tofacitinib Citrate (CAS: 540737-29-9, also known as Tofacitinib citrate, Tofacitinib Citrate, CP-690550 citrate, and JAK inhibitor citrate API) is a specialized JAK inhibitor citrate API used in formulation, analytical-development, and research programs where local regulations permit. Suzhou Pharmaceutical Technology Co., Ltd. supplies Tofacitinib Citrate API in controlled small-batch and bulk quantities from Suzhou, China, with export to South America, Australia, New Zealand, Mexico, Canada, and worldwide markets. Export documentation: COA and MSDS standard for all orders.
| Product Name | Tofacitinib Citrate |
| Structural Formula |  |
| Alias | Tofacitinib citrate; Tofacitinib Citrate; CP-690550 citrate; Tasocitinib citrate; JAK inhibitor citrate API |
| CAS Number | 540737-29-9 |
| Molecular Formula | C22H28N6O8 |
| Molecular Weight | 504.5 g/mol |
| Purity | Available by agreed HPLC specification |
| Appearance | White to off-white powder |
| Storage | Store sealed, protected from moisture and strong light |
> Applications
Tofacitinib Citrate is used by pharmaceutical and research organizations developing JAK inhibitor citrate API formulations, reference methods, and impurity-control strategies. API supply is intended for qualified buyers who will confirm dosage form, impurity strategy, residual-solvent limits, pharmacopoeial approach, and finished-product registration obligations in their own markets.
JAK inhibitor citrate formulation research
A 2021 Journal of Pharmaceutical Research International study developed and validated an RP-HPLC method for Tofacitinib citrate residue determination, supporting chromatographic planning for API and formulation quality control (Journal of Pharmaceutical Research International, doi:10.9734/jpri/2021/v33i51B33541). PubChem compound record CID 10174505 lists Tofacitinib citrate as C22H28N6O8 with InChIKey SYIKUFDOYJFGBQ-YLAFAASESA-N, supporting identity checks for analytical-development programs.
Analytical and impurity-control development
Buyers typically evaluate assay, related substances, chiral and related-substance profile, residual solvents, water content, identity, chiral impurity controls, and stability behavior before moving from sample quantities to pilot or commercial batches. We supply API only, not finished dosage forms, compounded preparations, or branded medicines.
> Sourcing & Supply
Suzhou Pharmaceutical Technology Co., Ltd. is an R&D-driven pharmaceutical company with synthesis, purification, and analytical capability for Tofacitinib Citrate API. Small batches (up to 10 kg) are prepared directly by our technical team in Suzhou. For larger commercial quantities, production is scaled up at qualified manufacturing facilities, with export documentation provided according to the order scope.
- Small-batch orders (≤10 kg): prepared by our technical team in Suzhou. Lead time 10–14 business days from order confirmation.
- Commercial bulk (>10 kg): scaled up at qualified manufacturing facilities. Lead time 14–21 business days depending on batch size and documentation.
We export Tofacitinib Citrate API to buyers across South America — including Brazil, Argentina, Colombia, Chile, Peru, Ecuador, Bolivia, Paraguay, and Uruguay — as well as to Australia, New Zealand, Mexico, and Canada. Inquiries from European, Middle Eastern, and Asian markets are also welcome.
> Quality & Export Documentation
Each Tofacitinib Citrate API order is supplied against the agreed specification. Standard release controls can include appearance, identification, assay by HPLC, related substances, chiral and related-substance profile, water content, and residual solvents when required by the order scope.
- COA: included with every order.
- MSDS: included with every order.
- COO: available for commercial bulk orders above 10 kg.
- Additional package: specification sheet, chromatogram, residual-solvent data, and stability-related information can be discussed before order confirmation.
> Packaging & Storage
Tofacitinib Citrate API is packed in sealed foil bags or foil-lined fibre drums, with secondary protection selected according to quantity and shipping route. Store sealed and protect from moisture and strong light.
> Pricing & Order Information
Pricing is quoted case by case based on quantity, specification, documentation, destination country, and shipping requirements. MOQ is typically 100 g, and sample quantities of 10–50 g are available for qualified buyers before pilot or commercial orders.
> FAQ
What is the minimum order quantity for Tofacitinib Citrate API?
The minimum order quantity for Tofacitinib Citrate API is typically 100 grams. Sample quantities of 10–50 g are available for qualified buyers.
What documents are included with a Tofacitinib Citrate bulk order?
All Tofacitinib Citrate orders include a COA and MSDS in English. For commercial bulk orders above 10 kg, COO is available as standard export documentation.
Can I request a Tofacitinib Citrate sample before placing a bulk order?
Yes. Sample quantities of 10–50 g are available for qualified buyers before pilot or commercial orders.
Do you export Tofacitinib Citrate API to South America?
Yes. We support inquiries from Brazil, Argentina, Colombia, Chile, Peru, Ecuador, Bolivia, Paraguay, and Uruguay.
Is CP-690550 citrate the same as Tofacitinib citrate?
Yes. CP-690550 citrate is a common synonym for Tofacitinib citrate; we supply API, not branded finished medicine.
Can buyers in Australia, New Zealand, Mexico, or Canada order Tofacitinib Citrate API?
Yes. We handle qualified inquiries from Australia, New Zealand, Mexico, Canada, and other international markets.
What specification is available for Tofacitinib Citrate CAS 540737-29-9?
Tofacitinib Citrate is supplied by agreed HPLC specification, including assay, related substances, residual solvents, water content, identity, and chiral impurity controls when required.
How is Tofacitinib Citrate packaged and shipped internationally?
Tofacitinib Citrate API is shipped in foil bags or foil-lined fibre drums with protection from moisture and strong light during international transit.
Do you supply finished Tofacitinib Citrate dosage forms?
No. We supply Tofacitinib Citrate API, not finished dosage forms, compounded products, or branded medicines.
What is Tofacitinib Citrate used for in development programs?
Tofacitinib Citrate is used in JAK inhibitor citrate API formulation, analytical-development, and research programs where local regulations permit.
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> Request a Quote or Sample
To request a quote or sample for Tofacitinib Citrate API (CAS 540737-29-9), please contact us directly at Info@fmyykj.com.
Include in your inquiry: required quantity (grams or kg), destination country, documentation requirements (COA + MSDS standard; COO for bulk), chiral impurity requirement if applicable, and intended use (formulation / analytical development / research / other). We respond to all inquiries within 1 business day.
Last reviewed: June 2026