Looking at the Material Safety Data Sheet of L-Tyrosine

Identification

Substance: L-Tyrosine.
Chemical Formula: C9H11NO3.
CAS Number: 60-18-4.
Physical Appearance: White crystalline powder.
Usage: Widely found in dietary supplements, pharmaceutical products, food fortification, and as a precursor in chemical synthesis.

Hazard Identification

Risk: Generally low hazard under standard handling conditions for healthy adults, but dust inhalation or accidental exposure to higher than recommended amounts can create health concerns.
Primary Routes of Exposure: Inhalation, ingestion, eye or skin contact.
Health Effects: Mild irritation possible for sensitive individuals on contact with skin or eyes. Ingestion in excess amounts may lead to gastrointestinal discomfort.
Fire Risk: Not classified as flammable, though airborne dust can still create ignitable clouds under specific conditions.
Environmental Hazard: Not regarded as presenting significant risk to aquatic life or plant systems in ordinary concentrations.

Composition / Information on Ingredients

Active Ingredient: L-Tyrosine (purity usually above 98%).
Common Impurities: Trace moisture, other amino acids, and synthesis byproducts.
Ingredient Source: Most often derived from microbial fermentation or chemical synthesis.

First Aid Measures

Eye Contact: Rinse carefully with plenty of lukewarm water. Remove contact lenses if present and easy to do. Avoid rubbing eyes.
Skin Contact: Wash thoroughly with soap and water. Seek attention if irritation develops and persists.
Inhalation: Move affected individual to fresh air. Get medical attention if breathing becomes difficult.
Ingestion: Rinse mouth with water. Do not induce vomiting unless directed by a medical professional. Seek help if large quantities are swallowed.

Fire-Fighting Measures

Suitable Extinguishing Agents: Water spray, foam, dry chemical, or CO2.
Unusual Hazards: Decomposition at high temperatures can release nitrogen oxides and carbon monoxide.
Protective Equipment: Use self-contained breathing apparatus and protective clothing if exposed to decomposition fumes.
General Advice: Keep dust levels low and avoid spreading airborne powder in enclosed spaces.

Accidental Release Measures

Personal Protection: Use gloves, safety goggles, and masks, especially during cleanup of spills.
Spill Management: Scoop or sweep up gently to avoid dusting. Clean surface with water.
Environmental Protection: Prevent large spills from entering drains or waterways.
Ventilation: Ensure ample air circulation in areas where powder could become airborne.

Handling and Storage

Storage: Store in a dry, cool, well-ventilated place. Keep container tightly closed.
Handling: Avoid breathing dust or creating static-laden powder clouds. Wear suitable personal protection when transferring or mixing.
Incompatibility: Strong oxidizing agents, acids, and bases can react with L-Tyrosine to cause decomposition or loss of integrity.

Exposure Controls and Personal Protection

Respiratory Protection: Use dust mask or respirator during processes with airborne powder.
Eye Protection: Safety glasses with side shields or goggles recommended.
Skin Protection: Gloves and lab coats or appropriate work clothing to reduce contact.
Engineering Controls: Work in well-ventilated settings and use local exhaust systems to minimize powder exposure.

Physical and Chemical Properties

Molecular Weight: 181.19 g/mol.
Appearance: Solid, white to off-white powder with no characteristic odor.
Solubility: Slightly soluble in cold water, freely soluble in hot water, and usually insoluble in organic solvents.
Melting Point: 343°C (decomposes).
pH (1% Solution): Neutral to weakly acidic.
Stability: Stable under ambient conditions, sensitive to moisture and prolonged exposure to light.
Partition Coefficient: Log P around -2.26.

Stability and Reactivity

Stability: Chemically stable in unopened, dry, cool storage.
Reactivity: Can react with strong acids, bases, or oxidizing materials—leading to possible decomposition or unwanted byproducts.
Hazardous Decomposition: High heat or strong chemical reaction produces nitrogen oxides, carbon oxides, and possibly ammonia.
Polymerization: Not known to polymerize under normal handling.

Toxicological Information

Acute Toxicity: Low acute oral toxicity in standard laboratory models. Normal dietary intake is considered safe for healthy adults.
Chronic Effects: No evidence of carcinogenicity or mutagenicity associated with typical exposure levels.
Overdose Effects: Nausea, headaches, or mild irritant effects may occur if consumed greatly in excess of recommended dietary intake.
Target Organs: In high amounts, potential effects on neurological function, kidney function, and blood pressure control—usually overlooked at regular dosages.
Allergic Sensitization: Rare, but hypersensitive individuals may experience skin or respiratory issues.

Ecological Information

Biodegradability: Readily biodegradable due to amino acid structure.
Aquatic Impact: Low toxicity toward aquatic organisms at reasonable concentrations.
Persistence: Not persistent or bioaccumulative under customary environmental conditions.
Other Effects: Breakdown products are natural constituents in soil and water, minimizing long-term impact.

Disposal Considerations

Disposal: Dispose as non-hazardous laboratory or pharmaceutical waste if not contaminated with hazardous materials.
Waste Management: Small quantities can be dispersed with massive water dilution in accordance with local regulations.
Landfill: Acceptable in licensed landfill sites when proper precautions taken to avoid dust hazards.
Container Disposal: Clean out containers thoroughly before recycling or discarding as permitted by regulatory agencies.

Transport Information

UN Classification: Not regulated as a hazardous material for road, sea, or air transport.
Packing: Use sealed, moisture-protected packaging to prevent caking and contamination.
Handling: Avoid rough handling to prevent rupture and powder leaks.
Labeling: Label as non-hazardous, though good practice involves listing amino acids for clarity in mixed loads.

Regulatory Information

Global Status: Accepted as a food additive and supplement ingredient under most national health agencies, including the U.S. FDA and European Food Safety Authority.
Workplace Safety: Rarely flagged as hazardous but included in workplace chemical inventories; some countries require Safety Data Sheets for all pure substances.
Environmental Rules: Not identified for restriction or special environmental tracking under REACH, TSCA, or similar bodies.
Occupational Limits: Generally not assigned a specific exposure limit, but best handled with regular good laboratory or industrial hygiene practices.