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Premium Amino Acids &
Fine Chemicals Supplier

Siwei Development Group Ltd. is a trusted Chinese manufacturer and exporter of high-purity amino acids, APIs, intermediates, and specialty fine chemicals for pharmaceutical, nutraceutical, and industrial applications.

Chemical Molecule Structure

About Siwei Development Group

Siwei Development Group Ltd. is a reputed professional enterprise in China dedicated to the production and sales of amino acids and fine chemical products. With years of industry experience, we have established ourselves as a reliable supplier and exporter in the global chemical market.

Our meticulous efforts in research, development, and manufacturing ensure that we deliver high-purity, pharma-grade raw materials used across dietary supplements, functional foods, pharmaceuticals, and industrial applications.

15+
Years in Industry
50+
Products Exported
Chemical Compound Lab Equipment Molecular Structure Chemical Plant

Our Product Range

We specialize in high-purity amino acids, fine chemicals, pharmaceutical intermediates, and active pharmaceutical ingredients (APIs) for global clients in pharmaceutical, nutraceutical, and research sectors.

L-Alanine Isopropyl Ester Hydrochloride

L-Alanine Isopropyl Ester Hydrochloride

CAS: 62062-65-1

Amino acid ester used in peptide synthesis and pharmaceutical intermediates.

N-Hydroxysuccinimide

N-Hydroxysuccinimide

CAS: 6066-82-6

Commonly used in bioconjugation and active ester formation.

BOC-4-Hydroxy-L-Proline

BOC-4-Hydroxy-L-Proline

CAS: 13726-69-7

Protected amino acid for peptide synthesis and drug development.

Fmoc-OSu

N-(9-Fluorenylmethoxycarbonyloxy)succinimide

CAS: 82911-69-1

Fmoc-OSu used in solid-phase peptide synthesis.

3-Vinyl-7-Oxabicycloheptane

3-Vinyl-7-Oxabicyclo[4.1.0]heptane

CAS: 106-86-5

Cyclic ether compound used in organic synthesis.

R-(+)-2-Phenoxypropionic Acid

(R)-(+)-2-Phenoxypropionic Acid

CAS: 1129-46-0

Chiral building block for agrochemicals and pharmaceuticals.

Diaveridine

Diaveridine

CAS: 5355-16-8

Dihydrofolate reductase inhibitor used in veterinary medicine.

Bismuth Oxide

Bismuth Oxide

CAS: 1304-76-3

Used in pharmaceuticals, ceramics, and electronic materials.

S-(-)-2-Chloropropionic Acid

S-(-)-2-Chloropropionic Acid

CAS: 29617-66-1

Chiral synthon for herbicides and pharmaceuticals.

2-Amino-4-Chlorobenzoic Acid

2-Amino-4-Chlorobenzoic Acid

CAS: 89-77-0

Intermediate in dye and pharmaceutical synthesis.

R-(3)-Aminopiperidine Dihydrochloride

(R)-3-Aminopiperidine Dihydrochloride

CAS: 334618-23-4

Chiral amine used in CNS drug development.

Tasimelteon

Tasimelteon

CAS: 609799-22-6

Melatonin receptor agonist used in circadian rhythm disorders.

Why Choose Chinapharmas?

High Purity Standards

All products undergo rigorous quality control to meet pharmaceutical and research-grade specifications.

Global Export Experience

Trusted by clients worldwide with efficient logistics and documentation support.

Regulatory Compliance

Aligned with Chinese Pharmacopoeia and international quality standards.

150+
CAS Numbers Available
30+
Countries Served
99.9%
Customer Satisfaction
24h
Avg. Response Time

Latest News & Events

October 20, 2023

Chinese Pharmacopoeia 2023

The Chinese Pharmacopoeia 2023 edition completed preparation and officially implemented on July 1, 2023, enhancing quality standards for pharmaceutical raw materials.

May 18, 2024

CPHI Shanghai 2024

Siwei will attend CPHI China in Shanghai from June 19–21, 2024. Visit us at Booth EA1801 to discuss partnership opportunities.

Get in Touch

For inquiries, quotes, or technical support, please reach out through our official website.

Phone

0086-571-82881840

Address

Rm2-2-503 Zhongdingyuan Xianghurenjia Wenyan Xiaoshan Hangzhou China

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