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L-Cysteine
L-Cysteine for amino acid sourcing and formulation.
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L-Cysteine at a Glance
ZXCHEM is an L-cysteine supplier in China. L-Cysteine is a sulfur-containing amino acid supplied in crystalline form for formulation and processing applications. It is supplied as white crystals with slight characteristic smell.
Free sample: up to 500 g. Courier cost payable or use your courier account.
Certificates depend on the product, grade and production site. We send the documents that apply to your order with the quotation.
L-Cysteine Specifications
Typical values. The COA of each batch prevails.
Storage & Shipping
Storage
Store in a well-closed container Away from moisture.
Shelf life
Two years, in unopened original packaging.
Packaging & container loading
25kg/Fiber Drum with double plastic container inside. Qty in 20′ FCL: 8MTS(with pallets)
Handling
Use clean, dry tools during handling. Reseal opened packaging promptly to protect the material from moisture and contamination.
What Is L-Cysteine?
L-Cysteine is a sulfur-containing amino acid identified by CAS 52-90-4, supplied as white crystalline material. Its reactive thiol group gives it a technical profile distinct from amino acids without this sulfur functionality.
The free amino acid is different from cysteine hydrochloride and from cystine, the oxidized disulfide form. These identity differences matter in professional formulation and processing applications. Developers should assess the stated form and its behavior under the intended oxidation, mixing and storage conditions when selecting it for an ingredient system.
See related nutrition ingredients in our catalog.
L-Cysteine Applications
Nutrition blends
The amino acid ingredient is an option for suitable nutrition blends and powder formulations. Assay, identity and impurity requirements help purchasing teams define the material grade and compare supplier quotations.
Food formulation and processing
Suitable food-related formulation or processing applications can use the selected amino acid grade. Match the recipe requirements and intended manufacturing process to the technical specification when ordering.
Ingredient premixes
L-Cysteine can be incorporated into compatible amino acid and multi-ingredient premixes. Specify the required composition, grade and packing so sample evaluation and commercial sourcing use the same material.
Why Source L-Cysteine from ZXCHEM
Combined ingredient orders
Coordinate l-cysteine with other botanical and nutrition ingredients through one ZXCHEM contact. We coordinate the grades, quantities and packing for your combined ingredient order.
Dedicated R&D laboratory
Our dedicated R&D laboratory supports product testing and technical enquiries. Formulation and purchasing teams can discuss l-cysteine specifications and sample feedback with technical staff before arranging commercial supply.
Technical document support
Obtain the matching technical data and batch COA for the selected l-cysteine grade. Ask for the available safety and product documents needed for your qualification records.
Export service
Share the order quantity, destination and preferred trade terms for a bulk l-cysteine quotation. Our export team handles packing and shipment documents. Technical and commercial enquiries receive a response within one business day.
Related Ingredients
L-Cysteine FAQ
Which l-cysteine specification should I use for purchasing?
The product specification includes Character: White Crystals with Slight Characteristic Smell. Tell ZXCHEM the grade and formulation you need. We can provide the matching technical information and sample before quoting bulk supply.
Can ZXCHEM provide a free l-cysteine sample?
You can request a free sample of up to 500 g for evaluation. Courier costs are payable, or you can use your own courier account. Send the required l-cysteine grade, intended application and delivery address so our team can arrange the matching sample and technical information.
How is l-cysteine packed for bulk orders?
Packing is 25kg/Fiber Drum with double plastic container inside. Include your quantity and destination in the quotation request. ZXCHEM can confirm packing details and coordinate l-cysteine purchasing with your preferred FOB, CFR or CIF terms.
Which documents accompany l-cysteine supply?
Each order comes with a batch COA, and we provide the TDS and SDS for the selected grade. Tell us your destination market if you need additional export documents.
Request a Quote for L-Cysteine
Tell us the product grade, quantity, destination and required documents. We reply within one business day.
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