FAQ: L-Cystine

Question 1

What is L-Cystine?

Accepted Answer

L-Cystine is a chemical product listing on XCHEMI (https://www.xchemi.com), offered by American Ingredients, Inc. for international B2B procurement. The CAS Registry Number shown on this listing is 56-89-3. Specifications on this page are provided by the supplier; confirm critical attributes before purchase.

Question 2

What is the CAS number for this listing?

Accepted Answer

This XCHEMI product page lists CAS 56-89-3 for L-Cystine. CAS numbers help align chemical identity across suppliers and regions. Always verify identity, grade, and impurity profile with supplier documentation (e.g., COA) before use in regulated processes.

Question 3

How can I request a quotation or buy L-Cystine?

Accepted Answer

Use the XCHEMI marketplace actions on this listing (https://www.xchemi.com/product/727305442550221870.html) to contact American Ingredients, Inc. and request a quotation (RFQ). Offer price and currency—when shown—come from the supplier listing and may vary by quantity and shipping terms.

Question 4

What purity, grade, and packaging are listed?

Accepted Answer

Appearance: White L-CYSTINE.

Question 5

How should chemicals be stored and handled?

Accepted Answer

Follow supplier SDS / label instructions, local regulations, and your site safety program. XCHEMI is a B2B marketplace; obtain current SDS and handling guidance from American Ingredients, Inc. before receipt, storage, or use.

Question 6

What are typical applications for L-Cystine?

Accepted Answer

Applications depend on industry segment and process requirements. Use this listing as a sourcing lead and validate fitness-for-purpose with American Ingredients, Inc. for your intended use (e.g., synthesis, formulation, manufacturing).

Question 7

Is a safety data sheet (SDS / MSDS) available?

Accepted Answer

Request SDS/MSDS and regulatory documents from American Ingredients, Inc. through XCHEMI quotation or supplier contact. Marketplace summaries do not replace official safety documentation.

Question 8

Who is the seller for this product on XCHEMI?

Accepted Answer

American Ingredients, Inc. is identified as the seller on this listing. You can open the supplier storefront from this page when available to review company profile and other listed chemicals.

L-Cystine

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