Product Name: Citric Acid Anhydrous
Chemical Formula: C6H8O7
CAS Number: 77-92-9
Recommended Use: Acidulant, flavoring agent, pH control
Supplier Details: Name, address, telephone, and emergency phone of supplier or manufacturer should be kept available on hand for quick communication in emergencies.
Classification: Eye irritation, category 2A, Skin irritation, category 2
Physical State: White crystalline powder
Signal Word: Warning
Hazard Statements: Causes serious eye irritation; may cause mild skin irritation
Pictogram: Exclamation mark symbol
Precautionary Statements: Wash hands thoroughly after handling; wear eye protection such as goggles; avoid inhalation of dust; seek medical advice if symptoms persist.
Chemical Name: Citric Acid Anhydrous
Percentage: 100%
Impurities: No relevant impurities contributing to hazard classification at typical purity levels
Molecular Weight: 192.13 g/mol
EC Number: 201-069-1
Synonyms: 2-Hydroxypropane-1,2,3-tricarboxylic acid
General: Move away from exposure site; remove contaminated clothing.
Inhalation: Move affected person to fresh air; provide oxygen if breathing is difficult.
Skin Contact: Flush skin with soap and water; seek medical attention for persistent irritation.
Eye Contact: Rinse eyes with running water for several minutes, lifting eyelids, until discomfort lessens; call a physician for persistent complaints.
Ingestion: Rinse mouth; drink water to dilute; seek medical help if feeling unwell.
Suitable Extinguishing Media: Water spray, dry chemical, carbon dioxide (CO2), foam
Unsuitable Media: Avoid direct water stream on product as it may spread spilled material
Specific Hazards: Product decomposes on combustion, releasing carbon oxides
Protective Equipment: Firefighters should wear self-contained breathing apparatus and protective clothing
Advice for Firefighters: Move containers from fire area if it can be done safely; cool nearby containers with water spray
Personal Precautions: Use personal protective equipment; avoid breathing dust; ensure adequate ventilation in area.
Environmental Precautions: Prevent entry into sewers and watercourses to limit environmental impact.
Clean-up Methods: Sweep up powder; transfer to a suitable container for disposal; rinse spill area with water to remove residues.
Handling: Minimize dust generation; handle with care using gloves and goggles; open containers in a well-ventilated space.
Storage: Store in a cool, dry, and well-ventilated area; keep containers tightly closed; segregate from incompatible materials such as oxidizers and strong bases; protect from moisture.
Exposure Limits: No occupational exposure limits assigned for this substance by OSHA, NIOSH, or ACGIH.
Engineering Controls: Use local exhaust ventilation if dust is generated; ensure workplace air monitoring as needed.
Personal Protective Equipment (PPE): Wear safety goggles for eye protection, chemical-resistant gloves, dust mask or respirator in case of inadequate ventilation, lab coat or coveralls for body protection.
Hygiene Measures: Avoid eating, drinking, or smoking during use; wash hands after handling; remove contaminated clothes and launder before re-use.
Appearance: White, odorless, crystalline powder
Odor: None
pH: 1.8 (0.1 M solution)
Melting Point: 153°C
Boiling Point: Decomposes before boiling
Solubility: Soluble in water (59 g/100 mL at 20°C), slightly soluble in ethanol
Density: About 1.66 g/cm3 at 20°C
Vapor Pressure: Not applicable
Flash Point: Not flammable
Explosive Properties: None
Partition Coefficient: log Kow = -1.72
Chemical Stability: Remains stable under recommended storage conditions; absorbs moisture if exposed to atmosphere for extended periods
Reactivity: Reacts with strong oxidizers and some bases
Conditions to Avoid: Excess heat, open flame, direct sunlight, and moisture
Incompatible Materials: Alkaline substances, oxidizing agents
Hazardous Decomposition Products: Fumes of carbon dioxide, carbon monoxide under heat or fire conditions.
Acute Toxicity: Oral LD50 (rat): 3000 mg/kg; low toxicity concerns for humans at normal handling
Skin Corrosion/Irritation: May cause mild irritation to skin
Serious Eye Damage: Causes irritation if eye exposure occurs
Respiratory Sensitization: Dust may cause minor irritation to respiratory tract
Chronic Effects: No evidence found for carcinogenicity, teratogenicity, or reproductive toxicity in available studies on citric acid.
Other Data: Prolonged exposure may affect tooth enamel due to acidity.
Eco-toxicity: Low toxicity to aquatic life (Daphnia EC50 120 mg/L)
Biodegradation: Readily biodegradable; decomposes naturally in environment without significant bioaccumulation
Mobility: Dissolves in water and may travel through soil
Persistence: Does not persist; breaks down rapidly
Bioaccumulation Potential: Negligible; no measurable level in aquatic organisms
Waste Disposal: Dispose as non-hazardous chemical waste; comply with local, regional, national regulations
Methods: Large quantities: send to approved licensed disposal contractor; small quantities: dissolve in plenty of water, then flush to drain (observe local requirements)
Special Precautions: Avoid disposal into natural waterways or storm drains; containers should be emptied completely and rinsed
UN Number: Not regulated as dangerous good
Transport Hazard Class: Not classified
Packing Group: Not assigned
Proper Shipping Name: Citric Acid Anhydrous
Special Precautions: Keep dry during transport; avoid stacking heavy loads over product; avoid rupture of packaging
GHS Classification: Classified as an irritant under GHS standards
TSCA Status: Listed
DSL/NDSL: Listed in Canada
REACH Registration: Registered (Europe)
Other Regulations: Not listed as a hazardous material under US DOT, IMDG, or IATA; Not subject to hazard labeling beyond irritation warnings
Workplace Labeling: Use standard hazard symbols where required; provide hazard communication training to employees handling the material
SARA (311/312): Chronic Health Hazard; not subject to SARA 302 (Extremely Hazardous Substances)
