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Chemical Name: Thioacetic Acid
CAS Number: 507-09-5
Synonyms: Ethanethioic acid
Uses: Laboratory synthesis, chemical intermediate, specialized organic synthesis tasks
Appearance: Colorless to pale yellow liquid, sharp odor distinct from acetic acid
Hazard Class: Corrosive, can cause burns to skin and eyes
Acute Effects: Respiratory tract irritation, headache, nausea
Contact Risk: Immediate damage to tissue on contact, corrosive vapors
Regulatory Symbols: Acute toxic, skin corrosion, environmental hazard
Environmental Impact: Harmful to aquatic life; improper containment increases risk to wastewater systems
Chronic Risks: Prolonged exposure aggravates existing respiratory or skin conditions
Signal Words: Danger, due to rapid onset of symptoms after contact
Component: Thioacetic Acid
Chemical Formula: C2H4OS
Purity: Commonly supplied at high purity for laboratory use
Major Hazards: Skin and eye damage, respiratory toxicity
Mixtures: Rare in formulated products due to high reactivity and specific industrial use
Inhalation: Move exposed person to fresh air quickly; seek medical attention if coughing, dizziness, or breathing difficulty develops.
Skin Contact: Remove contaminated clothing. Rinse affected skin under running water for at least 20 minutes, pay extra attention to folds or creases.
Eye Contact: Rinse eyes with water for a sustained period, holding eyelids open, immediate medical attention crucial.
Ingestion: Do not induce vomiting, rinse mouth with water; medical help should be sought regardless of quantity.
Symptoms to Watch: Burning sensation, blistering, persistent coughing, difficulty breathing.
Suitable Extinguishing Media: Use dry chemical, CO2, or alcohol-resistant foam. Water spray may help cool containers, but should not be used directly on chemical spills.
Hazardous Combustion Products: Sulfur oxides, carbon monoxide, carbon dioxide
Special Equipment: Self-contained breathing apparatus and full chemical protective clothing
Fire Risks: Vapors are heavier than air, risk of re-ignition, residual hot spots on equipment
Evacuation: Isolate area, keep unnecessary personnel away
Spill Response: Ventilate area, use inert non-combustible absorbent
Personal Protection: Chemical-resistant gloves, goggles, respirator for vapor
Containment: Prevent run-off into water sources, seal drains if possible
Clean-Up: Collect residue in sealable containers; dispose according to hazardous waste protocols
Avoid: Contact with incompatible chemicals and prolonged exposure to vapors
Handling: Transfer under chemical fume hood, avoid inhalation of vapor, avoid contact with bare skin
Safe Storage: Store in cool, dry, well-ventilated area, away from direct sunlight and incompatible materials such as oxidizers and bases
Containment: Use glass or corrosion-resistant containers with tight seals
Labeling: Clear hazard labeling preferred for all containers
Incompatibles: Avoid acids, bases, oxidizers, and moisture, as reactions may release hazardous gases and heat
Engineering Controls: Use chemical fume hood, local exhaust ventilation
Eye/Face Protection: Safety goggles or face shield
Skin Protection: Chemical-resistant gloves (nitrile, neoprene), lab coat
Respiratory Protection: Approved respirators where vapor concentrations approach exposure limits
Hygiene: Wash hands before breaks and after work; decontaminate protective gear regularly
Limitations: Strictly no eating, drinking, or smoking in work areas
Appearance: Colorless to pale yellow liquid
Odor: Pungent, acrid sulfurous
Melting Point: Near room temperature, can crystallize at lower temperatures
Boiling Point: 93-95°C under reduced pressure
Solubility: Miscible with organic solvents, limited solubility in water
Vapor Pressure: Noticeable at room temperature, contributes to inhalation risk
Density: Slightly heavier than water
Stability: Stable under recommended storage conditions, but degrades on exposure to light, heat, and air
Reactive With: Strong oxidizers, reducing agents, alkalis, and metals
Decomposition Products: Sulfur compounds, acids, noxious gases on burning
Reactivity Hazards: Reacts violently with oxidizing agents, potential for dangerous releases if improperly mixed
Primary Routes of Exposure: Skin, eyes, inhalation of vapor, accidental ingestion
Acute Effects: Severe irritation or burns, risk of systemic poisoning with large exposures
Chronic Effects: Long-term exposure can sensitize skin, aggravate respiratory and neurological symptoms
Mutagenicity/Carcinogenicity: Not classified as carcinogenic; insufficient data to rule out genetic risk
Symptoms: Cough, sore throat, chemical burns, blisters, persistent headache
Aquatic Toxicity: Hazardous in aquatic environments, disrupts water chemistry and can harm aquatic life
Persistence: May degrade under basic and aerobic conditions, but breakdown products also cause harm
Bioaccumulation: Low predicted, but disrupts local microbiomes
Soil Impact: Can move through soil, risks leaching into groundwater after spills
Disposal Concerns: Avoid introduction to sewer systems or natural water bodies
Waste Treatment: Treat as hazardous chemical waste; neutralization before disposal may reduce hazards but creates its own risks
Preferred Methods: High-temperature incineration in chemical waste incinerators
Container Handling: Decontaminate and triple-rinse containers before recycling or landfill
Legal Obligations: Adhere to local, city, and federal hazardous waste guidelines
Do Not: Pour down drains, mix with non-compatible wastes, dispose in household trash
Shipping Name: Thioacetic Acid
Hazard Class for Transport: Corrosive liquid
Packing Group: Usually assigned to high-danger category for shipping
Transport Precautions: Use leak-proof, corrosion-resistant packaging; label as dangerous good; check for restrictions on air, sea, and ground shipments
Emergency Response: Spill control materials and first aid gear required during transport
Occupational Standards: Regulated workplace exposure limits often based on corrosiveness
Environmental Laws: Disposal and spill reporting governed by hazardous chemical regulations by country and region
Label Requirements: Chemical hazard pictograms and word of warning
Transport Regulations: Must follow international and local guidelines on labeling, packaging, and documentation for hazardous substances
SDS Access: Safety data available in university labs and chemical suppliers by law, digital copies often required for compliance audits
