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Product Name: Thiourea
Chemical Name: Thiourea
Synonyms: Thiocarbamide, Thiurea
CAS Number: 62-56-6
Molecular Formula: CH4N2S
Molecular Weight: 76.12 g/mol
Recommended Use: Laboratory reagents, manufacture of resins and plastics, photography, textile processing
Supplier Information: Industrial chemical distributors, laboratory supply chains, agricultural input suppliers
Contact Details: 24-hour emergency contact provided by distributor, safety support accessible through company hotline
Classification: Acute toxicity (oral, dermal, inhalation), suspected carcinogen
GHS Label Elements: Skull and crossbones, health hazard pictogram
Signal Word: Danger
Hazard Statements: Harmful if swallowed, may cause cancer, causes skin and eye irritation, may cause allergic skin reaction
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Precautionary Statements: Wear protective clothing, wash hands thoroughly after use, avoid breathing dust, keep away from food and drink, seek medical attention if exposed or feeling unwell
Chemical Name: Thiourea
Percentage: 99% or higher by weight
Impurities: Trace heavy metals, moisture content within industry specification
Additional Additives: None in typical commercial batches
Occupational Exposure Limits: Provided under regulatory guidelines in several regions
Inhalation: Remove exposed individual to fresh air, monitor for respiratory distress, seek medical assistance if symptoms persist
Skin Contact: Rinse skin immediately with plenty of water for at least 15 minutes, remove contaminated clothing and shoes, contact healthcare professional if irritation or allergic reaction occurs
Eye Contact: Flush eyes with copious amounts of water for a minimum of 15 minutes, seek prompt medical attention for discomfort, redness, or vision changes
Ingestion: Rinse mouth with portable water but do not induce vomiting, seek immediate medical evaluation, provide information about substance if possible
Symptoms of Exposure: Coughing, difficulty breathing, headache, skin redness, eye pain, allergic reactions, nausea, confusion; professionals should monitor for long-term effects depending on dose and duration
Suitable Extinguishing Media: Dry chemical powder, carbon dioxide, foam, water spray
Unsuitable Media: High-velocity water streams may scatter material, increasing hazard
Specific Hazards: Emission of toxic sulfur oxides, nitrogen compounds, cyanides upon combustion
Protective Equipment for Firefighters: Fully-encapsulating suit and self-contained breathing apparatus
Firefighting Procedures: Evacuate area, use non-sparking tools, cool containers with water from a safe distance
Explosion Risk: Dust-air mixtures may form explosive concentrations under rare conditions, precautions reduce ignition sources
Personal Precautions: Evacuate area, restrict unnecessary access, wear gloves, safety goggles, and a suitable respirator
Environmental Precautions: Prevent spillage from entering drains, waterways, or soil, notify regulatory agencies if large quantities escape
Cleanup Methods: Sweep up using non-sparking tools, avoid dust generation, place spilled material in a secure, labeled container for disposal, decontaminate area with plenty of water after cleanup
Handling: Use in a well-ventilated area, avoid contact with skin and eyes, minimize dust creation, do not eat or drink while handling, wash thoroughly before leaving work area
Storage Conditions: Store in a tightly closed, clearly labeled container, keep in a dry, cool, and ventilated space away from heat, direct sunlight, and incompatible substances such as oxidizing agents and acids
Storage Compatibility: Segregate from food, beverages, animal feeds, and reactive chemicals
Packaging Materials: Polyethylene or glass containers typically offer safe long-term storage, shipping drums require UN-compliant labeling and closures for transit
Exposure Guidelines: Occupational exposure limits defined by OSHA, ACGIH, and international bodies; consult specific jurisdiction for current limits
Engineering Controls: Local exhaust ventilation, fume hoods, and dust extraction systems
Personal Protective Equipment: Chemical-resistant gloves (nitrile, neoprene), face shield or safety goggles, lab coats or long-sleeved garments, NIOSH-approved respirator for dusty environments
Hygiene Measures: Thorough hand-washing, regular laundering of clothes, no shared protective gear, access to eye-wash stations and safety showers
Appearance: White to off-white crystalline powder
Odor: Odorless or faint sulfur-like note
Melting Point: 174–182 °C
Boiling Point: Decomposes before boiling
Solubility: Soluble in water, soluble in ethanol, sparingly soluble in ether
pH Value: Slightly acidic in aqueous solution
Vapor Pressure: Negligible at room temperature
Vapor Density: Not applicable due to low volatility
Specific Gravity: 1.405 (water = 1)
Flash Point: Not determined due to decomposition
Other Properties: Stable under recommended conditions, prone to slow hydrolysis in hot water, no odor threshold established
Chemical Stability: Stable under normal laboratory and storage conditions; deteriorates with excessive moisture or elevated temperature
Possible Reactions: Contact with oxidizers, acids, or alkalis leads to potentially hazardous decomposition
Decomposition Products: Ammonia, cyanides, sulfur oxides, and toxic gases
Conditions to Avoid: Excessive heat, sunlight, sparks, open flames, incompatible chemicals
Polymerization: Does not occur under standard conditions, long-term exposure not linked to hazardous polymerization
Acute Toxicity: Oral LD50 (rat): 125 mg/kg; significant risk at low ingestion amounts
Skin and Eye Contact: Causes irritation and possible allergic reactions; repeated exposure increases sensitivity risk
Chronic Effects: Evidence of carcinogenic potential in some animal studies, classified as a suspected carcinogen by IARC and NTP
Target Organs: Thyroid dysfunction, gastrointestinal tract, nervous system in cases of prolonged or significant exposure
Symptoms: Headaches, dizziness, nausea, confusion, dermatitis, allergic eczema
Other Data: Not classified as mutagenic in all studies, no clear link to reproductive toxicity documented reliably, though long-term monitoring is recommended in workplaces
Aquatic Toxicity: Toxic to aquatic organisms; potential for long-term adverse effects in aquatic environments
Persistence and Degradability: Persists in soil and water, slow natural degradation, risk for bioaccumulation in contaminated areas
Mobility in Soil: Moderate, leaching occurs in sandy soils, risk of waterway contamination in heavy rain
Bioaccumulative Potential: Moderate; not likely to accumulate significantly in higher food chain levels due to breakdown but can disrupt microorganism populations
Other Ecological Hazards: Contamination of surface and groundwater can alter nutrient cycles, impact aquatic plants and invertebrates; special attention required near wetlands or protected habitats
Waste Treatment Methods: Incinerate in a chemical incinerator equipped with afterburner and scrubber, manage under hazardous waste regulations
Contaminated Packaging: Triple-rinse with compatible solvent or water, dispose of as hazardous material
Disposal Precautions: Do not dump in sewers, waterways, or local municipal waste systems
Regulatory Disposal Guidance: Local, regional, and national environmental authorities publish disposal protocols for such substances; track and document waste stream from site of generation to final disposal
UN Number: 2811
UN Proper Shipping Name: Toxic Solid, Organic, N.O.S. (contains Thiourea)
Transport Hazard Class: 6.1 (Toxic substances)
Packing Group: III
Transport Labels: Toxic, environmental hazard, proper handling required
Environmental Hazards: Marked as “marine pollutant” for international shipments by sea
Transport Precautions: Secure containers tightly, avoid physical damage, respond to emergencies per carrier and local regulations, documentation must accompany all shipments
OSHA: Listed under hazardous workplace substances
EPA: Covered by Toxic Substances Control Act regulations for production, import, and waste disposal
EU REACH: Registration, Evaluation, Authorization, and Restriction of Chemicals listed, subject to safety reporting
Other International: Subject to IARC and NTP suspected carcinogen listings; notified under Schedule 3 of the Australia Inventory of Chemical Substances (AICS), included on Canadian DSL
Workplace Labelling: Chemical name, hazard pictograms, risk and safety phrases, supplier contact required on storage and transport units
Community Right-to-Know: Disclosure demanded in several countries as part of public health and environmental protection statutes
