L-tyrosine

L-Tyrosine (CAS 60-18-4), commonly abbreviated as Tyr, is a conditionally essential amino acid sourced through both fermentation and chemical synthesis for commercial supply.

Where is L-tyrosine used?

• Pharmaceuticals: bioactive building block, active ingredient and synthesis intermediate
• Thyroid-related compounds and specialty APIs
• Dietary supplements and functional nutrition: capsules, powders and sports nutrition blends for cognitive and physical performance support
• Food: flavor development in aged cheeses and fermented products
• Cosmetics: skin-brightening and melanin-modulating topical products acting on pigmentation pathways
• It is formulated into capsules, powders and sports nutrition blends.
• Used in cosmetics, such as tanning accelerators and skin care products, as a precursor of melanin.
• Used in pharmaceutical production as an API or excipient in parenteral and oral preparations.
• Due to limited water solubility, best used in capsules, tablets, or powder blends where complete dissolution is not required, or in acidic beverages where solubility improves.
• After an aminocarbonyl hot reaction with sugars, can generate special flavor substances.

Good to know: FEMA 3736 applies to its flavoring use. Established grades include USP, BP and Ph. Eur., with FCC-grade material for food and flavoring use.

Typical specification

• Assay content is 99 to 101.5%.
• Sold in powder and crystal form.
• Solubility increases in acidic or basic solutions due to ionization of its amino and carboxyl groups.

Storage, packaging and handling

• Should be stored in a cool, dry place without direct sunlight.
• Commonly packed in 25 kg drums.

Frequently asked questions about L-tyrosine

What is the solubility profile of L-tyrosine in water and ethanol?

L-tyrosine is soluble in water and poorly soluble in ethanol.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.