Suzhou Pharmaceutical Technology Co., Ltd. (China) supplies Zonisamide API CAS 68291-97-4 for pharmaceutical B2B procurement — COA, MSDS, and technical documentation available on request.
> Zonisamide API — Overview
Zonisamide (CAS: 68291-97-4, also known as zonisamida, Zonegran active ingredient, 1,2-benzisoxazole-3-methanesulfonamide, 1,2-benzoxazol-3-ylmethanesulfonamide, and AD-810) is a sulfonamide anticonvulsant API used in neurological formulation, analytical-development, and research programs where local regulations permit. Suzhou Pharmaceutical Technology Co., Ltd. supplies Zonisamide 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 | Zonisamide |
| Structural Formula |  |
| Alias | Zonisamida; Zonegran active ingredient; 1,2-benzisoxazole-3-methanesulfonamide; 1,2-benzoxazol-3-ylmethanesulfonamide; AD-810 |
| CAS Number | 68291-97-4 |
| Molecular Formula | C8H8N2O3S |
| Molecular Weight | 212.23 g/mol |
| Purity | Available by agreed HPLC specification |
| Appearance | White to off-white crystalline powder |
| Storage | Store sealed, protected from light and moisture |
> Applications
Zonisamide is used by pharmaceutical and research organizations developing neurological formulations, reference methods, and impurity-control strategies. API supply is intended for qualified buyers who will confirm dosage form, impurity requirements, pharmacopoeial strategy, and finished-dose registration obligations in their own markets.
Neurological formulation research
A 2005 Lancet journal article reported a randomized, double-blind, placebo-controlled study evaluating once-daily Zonisamide as adjunctive therapy in adults with partial seizures (Lancet Neurology, doi:10.1016/S1474-4422(05)70133-8, n=351). This supports the need for carefully controlled Zonisamide API quality in neurological formulation and analytical-development programs.
Analytical and impurity-control development
Buyers typically evaluate assay, related substances, residual solvents, water content, particle properties, and stability behavior before moving from sample quantities to pilot or commercial batches. We supply API only, not finished capsules, tablets, oral suspensions, compounded preparations, or branded medicines.
> Sourcing & Supply
Suzhou Pharmaceutical Technology Co., Ltd. is an R&D-driven pharmaceutical company with in-house synthesis and analytical capability for Zonisamide API. Small batches (up to 10 kg) are produced 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 Zonisamide 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
All Zonisamide shipments are accompanied by a Certificate of Analysis (COA) confirming identity, appearance, assay, and related substances against batch specification. Purity is tested by HPLC against an authenticated reference standard. MSDS is provided for all orders, and Certificate of Origin (COO) is available for commercial bulk shipments.
| Order size | Documentation included |
| ≤10 kg (small-batch / research) | COA + MSDS |
| >10 kg (commercial bulk) | COA + MSDS + COO |
> Packaging & Logistics
- 100 g, 500 g: double-layered aluminium foil bag, heat-sealed, nitrogen-purged
- 1 kg: aluminium foil bag inside kraft paper box
- 5 kg, 10 kg: aluminium foil bag inside fibre drum
- >10 kg: packaging agreed according to commercial order requirements
Zonisamide API is shipped with light- and moisture-protective packaging and batch labels matched to the COA. Shipping options include express courier for samples, air freight for kilogram orders, and sea freight for larger commercial shipments where timing allows.
> Pricing & Supply
Zonisamide pricing is provided on request. We do not publish list prices because the final quote depends on order quantity, purity requirement, documentation needs, shipping destination, and current raw material costs.
- MOQ: 100 g for qualified buyers
- Sample policy: 10–50 g samples available for analytical confirmation
- Bulk discount tiers apply at 500 g, 1 kg, 5 kg, and 10 kg
- Payment: T/T (bank transfer). 100% in advance for standard orders. Terms for larger repeat orders by arrangement.
> Frequently Asked Questions
What is the minimum order quantity for Zonisamide API?
The minimum order quantity for Zonisamide API is 100 grams. Sample quantities of 10–50 g are available for qualified buyers.
What documents are included with a Zonisamide bulk order?
All Zonisamide 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 Zonisamide 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 Zonisamide API to South America?
Yes. We support inquiries from Brazil, Argentina, Colombia, Chile, Peru, Ecuador, Bolivia, Paraguay, and Uruguay.
Can buyers in Australia, New Zealand, Mexico, or Canada order Zonisamida?
Yes. We supply Zonisamide API to buyers in Australia, New Zealand, Mexico, and Canada. COA and MSDS are included with all orders.
What is Zonisamide used for?
Zonisamide is a neurological API used in formulation, analytical-development, and research programs where local regulations allow.
Is Zonegran active ingredient the same as Zonisamide?
Yes. Zonegran active ingredient is a commercial-context synonym for Zonisamide; we supply API, not branded finished medicine.
What specification is available for Zonisamide CAS 68291-97-4?
Zonisamide is supplied by agreed HPLC specification, including assay, related substances, water content, and identity controls.
How is Zonisamide packaged and shipped internationally?
Zonisamide API is shipped in foil bags or foil-lined fibre drums with protection from light and moisture during international transit.
Do you supply finished Zonisamide capsules or tablets?
No. We supply Zonisamide API, not finished capsules, tablets, oral suspensions, compounded preparations, or branded medicines.
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> Request a Quote or Sample
To request a quote or sample for Zonisamide API (CAS 68291-97-4), 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), and intended use (formulation / analytical development / research / other). We respond to all inquiries within 1 business day.
Last reviewed: June 2026