L-Lysine monohydrochloride

CAS Number
657-27-2
EC Number
211-519-9

What is L-Lysine monohydrochloride?

L-Lysine monohydrochloride (CAS 657-27-2), also called L-Lysine hydrochloride, is the stabilized salt form of the essential amino acid lysine.

Where is L-Lysine monohydrochloride used?

  • Animal feed: corrects lysine deficiency in cereal-based diets for swine and poultry, improving feed conversion ratios and protein utilization
  • Food and beverage: fortifies protein-enriched products, meal replacements and functional nutrition formulations where lysine is the first limiting amino acid
  • Pharmaceutical: active or excipient in tablets and oral solutions, useful for controlled pH buffering of the dosage form
  • Personal care: conditioning agent and moisture-retention support in topical and hair care products
  • It offers improved handling and solubility over the free base form.

Commercial specifications

  • 98–101% purity on a dry basis
  • Feed-grade, food-grade (FCC), USP and Ph. Eur. grades; pharmaceutical grades subject to tighter impurity controls
  • Bulk bags and supersacks; feed-grade also in granular form for flowability

Other Names (Synonyms)

L-alpha,epsilondiaminocaproic acid monohydrochloride|(S)-2,6-Diaminohexanoic acid monohydrochloride|L-Lysine hydrochloride|lysine hydrochloride|Lysine hcl, l-|JNJ23Q2COM|Lysine, l-, monohydrochloride

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What are the physical properties of L-Lysine monohydrochloride?

Melting Point 263 °C (decomp)
Density 1.28 g/cm3 (20℃)
Appearance White crystalline powder
Color White to Off-white
Odor odorless
Form powder
Water Solubility 65 g/100 mL (20 ºC)
Vapor Pressure <1 Pa (20 °C)
pH 5.5-6.0 (100g/l, H2O, 20℃)
Log P -1.036 (est)

Which trade and regulatory codes apply to L-Lysine monohydrochloride?

HS Code 29224100
UN Number 1789
ADR Class 8
Packing Group III
Storage Class 11 - Combustible Solids
WGK (Germany) 2
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