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Product Name: DL-Methionine
Chemical Name: DL-2-Amino-4-(methylthio)butyric acid
CAS Number: 59-51-8
Synonyms: Methionine, 2-Amino-4-(methylthio)butyric acid
Recommended Uses: Feed additive, nutritional supplement
Supplier: Manufacturer or distributor details, specific address and contact information
Emergency Contact: Emergency telephone number, available 24 hours
Restrictions: Intended for industrial and professional use only
Hazard Class: Not classified as hazardous under GHS guidelines
Physical Hazards: Fine dust can form explosive mixtures in air
Health Hazards: May cause mild irritation to skin, eyes, and respiratory tract, especially if dust is inhaled in high concentrations; ingestion in large amounts can cause discomfort
Environmental Hazards: May ignite when exposed to open flame or strong oxidizers
Pictograms: No mandatory pictograms for standard handling, but general dust warning symbol applies
Precautionary Statements: Avoid breathing dust, use adequate ventilation, wear recommended personal protective equipment
Routes of Exposure: Inhalation, skin or eye contact, accidental ingestion
Chemical Identity: DL-Methionine
Purity: Typically >99% pure
Impurities: Trace levels of related amino acids, manufacturing byproducts, typically <1%
Molecular Formula: C5H11NO2S
Molecular Weight: 149.21 g/mol
Component Breakdown: Single-constituent substance, not blended or mixed unless otherwise shown on the label
Inhalation: Move to an area with fresh air, provide support for breathing if needed; seek medical attention if symptoms of irritation persist or worsen
Skin Contact: Remove contaminated clothing, wash affected area thoroughly with soap and water; irritation or redness requires medical advice
Eye Contact: Rinse immediately with plenty of clean running water for several minutes, holding eyelids open; medical attention if irritation continues
Ingestion: Rinse mouth with water, do not induce vomiting, seek immediate medical assistance if large quantities are swallowed
Notes to Physician: Treat symptomatically, no specific antidote exists
Suitable Extinguishing Media: Use water spray, dry chemical, foam, or carbon dioxide to control and extinguish flames
Unsuitable Extinguishing Media: Avoid using strong streams of water; may spread dust, which increases risk of dust cloud ignition
Specific Hazards: Fine particles can create explosive dust clouds, burning product can emit toxic gases like sulfur oxides, nitrogen oxides, carbon oxides
Protective Equipment: Firefighters should use self-contained breathing apparatus and full protective clothing
Special Procedures: Isolate fire area, prevent run-off water from entering drains or surface water; remove containers from fire zone if safe
Combustion Products: Sulfur dioxide, hydrogen sulfide, and other noxious gases
Personal Precautions: Wear dust mask, gloves, goggles, and protective clothing to reduce exposure
Environmental Precautions: Prevent material from entering soil, waterways, or drainage systems, contain spill with inert materials
Cleanup Procedures: Avoid dry sweeping if large amount is spilled, use vacuum or wet methods to avoid dust dispersal; collect residue for disposal
Notification: Notify local authorities if large releases threaten environment or public safety
Handling: Maintain dust control measures; only handle in well-ventilated spaces; refrain from eating, drinking, or smoking during use
Storage Conditions: Store in cool, dry, well-ventilated warehouse, tightly sealed original containers
Compatibility: Keep away from oxidizers, acids, ignition sources, and solutions with low pH
Container Advice: Use corrosion-resistant, tightly closed containers; label all containers with product identity and hazard warnings
Hygiene Practices: Wash hands and exposed skin after handling, launder contaminated clothing before reuse
Occupational Exposure Limits: No established national limits; keep airborne concentrations as low as possible
Engineering Controls: Use general and local exhaust ventilation to maintain levels below exposure guidelines
Respiratory Protection: Use NIOSH-approved dust mask or respirator when potential exists for inhaling dust
Eye Protection: Safety goggles with side shields or full face shield in dusty environments
Skin Protection: Chemical-resistant gloves, long-sleeved clothing, and closed footwear
Workplace Hygiene: Facilities to rinse eyes and wash skin, establish routine cleaning schedule to reduce dust
Appearance: White to off-white crystalline powder
Odor: Slight sulfurous odor
Odor Threshold: Not established
pH: Roughly 5-7 (1% solution in water)
Melting Point: 276 °C (decomposition)
Boiling Point: Not applicable (decomposes before boiling)
Flash Point: Not flammable in bulk form, dust may ignite at high temperatures
Evaporation Rate: Negligible
Flammability: Dust presents explosion hazard in air
Vapor Pressure: Not applicable
Vapor Density: Not applicable
Solubility: Approximately 50 g/L in water
Partition Coefficient: log Pow < 0 (readily water-soluble)
Auto-ignition Temperature: Not measured
Decomposition Temperature: Above ~276 °C
Viscosity: Not applicable for solids
Chemical Stability: Stable under usual storage and handling conditions, decomposes at elevated temperatures
Conditions to Avoid: Exposure to heat, flame, sparks, strong oxidizers, acids
Materials to Avoid: Strong acids, powerful oxidizing agents (like peroxides, nitrates), bases may cause reactions
Hazardous Decomposition Products: Sulfur oxides, nitrogen oxides, carbon monoxide, and other toxic gases
Polymerization: Will not undergo hazardous polymerization
Acute Toxicity: Oral LD50 (rat) > 5,000 mg/kg, indicating very low acute oral toxicity
Skin Corrosion/Irritation: Non-irritating under normal conditions; prolonged skin exposure could occasionally create mild irritation
Serious Eye Damage/Irritation: Dust can cause temporary discomfort, itching, or watering
Respiratory Sensitization: Prolonged exposure to heavy dust clouds may aggravate respiratory conditions
Carcinogenicity: No evidence of carcinogenic potential based on animal studies and structure-activity relationships
Mutagenicity: Not mutagenic in standard laboratory studies
Reproductive Toxicity: No harmful effects reported in animal studies with typical exposure levels
Target Organs: No target organ toxicity expected at low exposures
Ecotoxicity: Low toxicity to aquatic organisms; LC50 (96h, fish) > 100 mg/L, EC50 (48h, daphnia) > 100 mg/L
Persistence and Degradability: Readily biodegradable, breaks down in soil and water through microbial activity
Bioaccumulative Potential: Very low, does not concentrate in aquatic life
Mobility in Soil: High water solubility, potential for leaching if large releases occur
Other Adverse Effects: Excessive quantities can disrupt local nutrient balances in aquatic ecosystems, but typical use does not cause significant harm
Waste Handling: Dispose of spilled product, off-spec material, or unused quantities through licensed waste disposal contractors
Disposal Methods: Landfill or incineration in accordance with local, regional, and national regulations
Container Disposal: Rinse containers thoroughly, then dispose or recycle according to local requirements; avoid reuse of packaging for food or drink
Special Considerations: Prevent waste from contacting ground water, surface water, or soil; report large disposals to environmental authorities
UN Number: Non-regulated for road (ADR/RID), sea (IMDG), air (IATA)
Proper Shipping Name: Not hazardous under transport rules
Hazard Class: None required
Packing Group: None
Special Precautions: Ensure containers are properly secured, protected from moisture and damage
Transport in Bulk: Code for bulk shipments not required for standard handling
TSCA (US): Listed
EINECS/ELINCS (EU): 200-432-1, substance exists on European inventory
REACH Status: Registered or exempted under EU REACH regulation
OSHA Hazard Communication: Non-hazardous under US regulations
WHMIS (Canada): Not regulated as hazardous
Other Regulatory Status: Subject to workplace safety, food or feed additive rules in most jurisdictions; check national and local requirements
Labeling: Standard SDS labeling required for bulk shipments and industrial containers
West Ujimqin Banner, Xilingol League, Inner Mongolia, China
