99% Tiopronin API Powder With Best Prices

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Why You Import Bulk Tiopronin API From Us?

First: Strict GMP guidelines guarantee high quality.

The bulk powder is produced strictly according to cGMP guidelines. 

Therefore, this API is suitable for the production of finished dosages for human consumption, especially for pharmacy compounding.

Second: Steady supply with stable stock

Our standard stock quantity for it is 100~200 Kilos.

Stock status may slightly differ due to order quantities submitted by regular customers, but we make sure of the quick supply to the customers through our flexible production plans.

What is Tiopronin?

Tiopronin Chemical Structure
Tiopronin Chemical Structure


It is a white to off-white powder with its characteristic odor.

Of course, as an organic sulfur compound, it doesn’t smell good, at least not pleasant.

Tiopronin is soluble in water or ethanol, and very slightly soluble in chloroform or ether.

Meanwhile, as a reducing molecule, tiopronin quickly goes bad when exposed to high temperatures and sunlight.

Product Name: Tiopronin (硫普罗宁)

Cas Number: 1953-02-2

Molecular Formula: C5H9NO3S

Molecular Weight: 163.20 g/mol

Chemical Name: (2S)-2-amino-3-methyl-3-sulfanylbutanoic acid

HS Code: 2930909099 (Other organic sulfur compounds-其他有机硫化合物)

Suitability to be shipped by air as common goods: suitable. It is safe to be shipped by air as common goods.

Grade: Pharma-Grade

Purity or Assay: 99%

Standards: Current Enterprise/USP Standards

Certificates available: GMP/ISO

Documents Available: COA/DMF/MSDS

Supply Capability: 1000+ KG per year


Price Ideas In 2023: 1680USD/1KG, 900USD/KG for 10-25KG. (For more updated prices, contact us directly by email or WhatsApp)

Lead Time: 5~6 days for quantities less than 50KG, 3~4 days for orders less than 10KG.

Stock Status: Over 100KG

Shipping Temperature: Room temperature

Storage: Room temperature

Testing Spectrums Available For Tiopronin API

For Purity: HPLC or LC-Mass

We test its purity on every batch before they are released for export.

We need to make sure the quality is good before materials leave our warehouse.

Our purity requirement for our bulk tiopronin is 98.5% as min, normally the actual results will be over 99%.

For Structure: 1HNMR

We don’t test 1HNMR for every batch, but if you need it, we will test it for you.

As HPLC can also be used for identification with the comparison with the testing spectrum of RS, once the Retention Time of Peaks corresponds, it is the same material for sure.

Elemental Analysis:

We don’t normally do elemental analysis for this product, as it is not required by our SFDA or any other pharmacopeias.

If you have such requirements, we will test them in a third-party testing institution for you. 

Technical Documents Download

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