Amino Acids

Amino acids and related derivatives need to be selected by chemical form, not a broad category label. This directory includes individual amino acids, hydrochloride forms and selected derivatives. A base powder, hydrochloride and other related material can have different identity, assay and formulation considerations, even when their names share a root. Check the exact product and specification before treating one as a substitute for another.
For a useful inquiry, provide the full ingredient name, intended application, target assay and destination market. Tell us whether your quality team requires a particular test method, form, particle size, impurity limit or packaging format. A percentage in a product title is a grade label; the current product specification and batch documentation should determine what can actually be accepted. We can confirm which listed grade and documents are available for review rather than assume a single standard applies across the entire category.
Compare specific products:

L-Leucine Powder 98.5% and L-Isoleucine Powder 98.5% are separate branched-chain amino acid grades to compare by identity and specification.
L-Valine Powder 98.5% and L-Glutamine Powder 98.5% illustrate why buyers should name the exact amino acid in an RFQ.
L-Arginine Base Powder 98.5% and L-Arginine Hydrochloride Powder 98.5% make the base-versus-hydrochloride distinction explicit.
N-Acetyl-L-Cysteine Powder 99% and 5-HTP Powder 98% are related materials with different identities and qualification questions.

Before requesting a quotation or sample, send the specification that your team will use for incoming inspection. If an existing formula calls for a specific salt form or assay basis, include it in the request. We can then discuss the closest listed option, confirm current documentation availability and identify any question that needs resolving before qualification. Send the exact amino acid grade and your acceptance criteria.