What is L-Lysine Hydrochloride CAS 657-27-2?

L-Lysine Hydrochloride CAS 657-27-2 is the hydrochloride salt of the essential amino acid L-lysine, with molecular formula C6H15ClN2O2, molecular weight about 182.65 g/mol, and EINECS 211-519-9. It is supplied as a white to off-white crystalline powder or granules and is also called L-lysine HCl.

What are the key feed-grade specifications for L-Lysine Hydrochloride?

Typical specifications include a white to off-white crystalline powder or granules, assay of at least 98.5%, pH of 5.0-6.0 in a 10% solution, and loss on drying at or below 1.0%. The product is freely soluble in water.

How does L-Lysine HCl differ from L-Lysine Sulfate or liquid Lysine?

L-Lysine HCl is a high-purity crystalline salt, usually with assay above 98.5%, while lysine sulfate is typically a fermentation complex containing around 70% lysine activity and liquid lysine base has different handling properties. These forms differ in concentration, solubility, and formulation fit.

Can L-Lysine Hydrochloride be used in water-soluble veterinary powders?

Yes. Because it is freely soluble in water, L-Lysine HCl is suitable for water-soluble feed supplements, drinking-water formulations, and clear veterinary powder products where insoluble residues would be undesirable.

L-Lysine Hydrochloride CAS 657-27-2

L-Lysine Hydrochloride, also called L-lysine HCl or lysine monohydrochloride, CAS 657-27-2, is a white to off-white crystalline feed-grade amino acid. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 657-27-2
Synonyms: L-Lysine HCl, L-Lysine monohydrochloride, (S)-2,6-Diaminohexanoic acid monohydrochloride, Lysine hydrochloride, Lysine HCl
Einecs: 211-519-9
Molecular Formula: C₆H₁₅ClN₂O₂
Grade: Feed Grade
Package: 25kg/bag (Plastic woven bag with PE liner) or 500kg/1000kg Jumbo Bag.

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Product Description

L-Lysine Hydrochloride CAS 657-27-2 is the hydrochloride salt of the essential amino acid L-lysine, with molecular formula C6H15ClN2O2, molecular weight about 182.65 and EINECS 211-519-9.

Synonyms: L-Lysine HCl; L-Lysine monohydrochloride; (S)-2,6-Diaminohexanoic acid monohydrochloride; Lysine hydrochloride; Lysine HCl.

CAS: 657-27-2.

It has the molecular formula C6H15ClN2O2 and a molecular weight of about 182.65 g/mol.

It appears as a white to off-white crystalline powder or granules.

A typical specification includes assay of at least 98.5%, pH of 5.0–6.0 in a 10% solution and loss on drying of at most 1.0%.

It is freely soluble in water.

Corn- and soy-based animal diets are often deficient in lysine, so L-Lysine HCl is added to balance amino-acid nutrition.

It supports lean muscle deposition, growth performance and feed efficiency in swine, poultry and aquaculture.

As a high-purity crystalline salt, it provides a reliable lysine level in compound feed and premixes.

It differs from lysine sulfate and liquid lysine by its higher assay and crystalline form.

Because it is freely soluble in water, it is also suitable for water-soluble feed supplements and drinking-water formulations.

Store in a cool, dry, well-ventilated area in airtight packaging to prevent moisture pickup and caking.

It is stable under normal storage but should be kept away from strong oxidizers and excessive moisture.

Confirm appearance, assay, pH, loss on drying, heavy metals, microbial limits and residual solvent limits as required.

Use dust masks or respirators and eye protection during handling, and wash skin contact with soap and water.

Confirm packaging with the requested quantity and destination requirements.

The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

For an RFQ, state the intended use, required grade and specification, quantity, packaging, destination and document needs.

FAQ - Technical & Supply Chain

Q:
What is L-Lysine Hydrochloride CAS 657-27-2?

A: L-Lysine Hydrochloride CAS 657-27-2 is the hydrochloride salt of the essential amino acid L-lysine, with molecular formula C6H15ClN2O2, molecular weight about 182.65 g/mol, and EINECS 211-519-9. It is supplied as a white to off-white crystalline powder or granules and is also called L-lysine HCl.
Q:
Why is L-Lysine Hydrochloride used in animal feed?

A: Corn- and soy-based animal diets are often deficient in lysine, so L-Lysine HCl is added to balance amino-acid nutrition. It supports lean muscle deposition, growth performance, and feed efficiency in swine, poultry, and aquaculture.
Q:
What are the key feed-grade specifications for L-Lysine Hydrochloride?

A: Typical specifications include a white to off-white crystalline powder or granules, assay of at least 98.5%, pH of 5.0-6.0 in a 10% solution, and loss on drying at or below 1.0%. The product is freely soluble in water.
Q:
How does L-Lysine HCl differ from L-Lysine Sulfate or liquid Lysine?

A: L-Lysine HCl is a high-purity crystalline salt, usually with assay above 98.5%, while lysine sulfate is typically a fermentation complex containing around 70% lysine activity and liquid lysine base has different handling properties. These forms differ in concentration, solubility, and formulation fit.
Q:
Can L-Lysine Hydrochloride be used in water-soluble veterinary powders?

A: Yes. Because it is freely soluble in water, L-Lysine HCl is suitable for water-soluble feed supplements, drinking-water formulations, and clear veterinary powder products where insoluble residues would be undesirable.

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