© 2026 Nanjing Finechem Holdings Co., Ltd,
All Right Reserved
Chemical Name: Anhydrous Sodium Citrate Monobasic
Common Synonyms: Sodium dihydrogen citrate
Appearance: White crystalline powder
Odor: Odorless
Chemical Formula: NaC6H7O7
Typical Use Cases: Buffering agent in labs, pharmaceuticals, processed foods as an acidity regulator, and biochemistry applications.
Solubility: Easily dissolves in water, not soluble in alcohol.
CAS Number: 18996-35-5
Hazard Statements: Not flammable or reactive under normal conditions. Inhalation of dust may cause mild respiratory irritation. Contact with skin or eyes can lead to minor irritation or redness.
GHS Label Elements: Avoid breathing dust. Wear eye protection if working with the powdered form in large volumes.
Likely Routes of Exposure: Inhalation, ingestion, skin and eye contact.
Symptoms of Overexposure: Slight coughing, dry throat, mild eye or skin itching.
Active Component: Sodium Citrate, Monobasic, Anhydrous
Purity: Largely greater than 99% as a reagent grade.
Known Impurities: May contain trace sodium salts but at levels not typically considered hazardous.
Inhalation: Remove affected person to fresh air. Offer water to drink if mouth or throat feels dry. Seek medical advice if breathing is labored.
Eye Contact: Rinse eyes gently with clean water for several minutes. Remove contact lenses if present and safe to do. Continue rinsing.
Skin Contact: Wash area well with soap and water. Remove contaminated clothing if irritation continues.
Ingestion: Rinse mouth with water. Do not induce vomiting. Drink plenty of water as a precaution. Get medical attention if large amounts are swallowed or symptoms persist.
Fire Hazards: Not considered flammable. Product does not catch fire easily and does not fuel combustion.
Suitable Extinguishing Media: Use water spray, dry chemical powder, or CO2 on any fire in the area. No special extinguishing agents needed.
Protective Actions: Wear self-contained breathing apparatus and protective clothing. Prevent dust inhalation.
Hazardous Combustion Products: High heat or fire may generate sodium oxides and carbon oxides in trace amounts, but decomposition is unlikely under normal fire conditions.
Personal Precautions: Avoid breathing dust clouds. Use gloves and goggles for personal safety.
Spill Cleanup Methods: Sweep up material, avoiding dust formation. Collect and place in a suitable closed container for disposal. Wash area with water after pickup.
Environmental Precautions: Prevent major quantities from entering drains. Rinse exposed surfaces to avoid residue buildup and slipping hazard.
Precautions for Safe Handling: Avoid creating unnecessary dust. Store away from acids to lessen the risk of chemical reaction. Always handle with dry hands or gloves.
Storage Recommendations: Keep in tightly sealed container. Store in a cool, dry, well-ventilated place. Protect from moisture and direct sunlight. Separate from incompatible chemicals such as strong acids.
Engineering Controls: Work in areas with good ventilation to minimize inhalation risks. Use local exhaust if dust becomes noticeable.
Personal Protective Equipment: Lab workers should wear eye protection such as safety glasses, gloves, and dust masks when handling large amounts.
Hygiene Measures: Wash hands thoroughly after handling. Remove and wash contaminated clothing before reuse.
Exposure Limits: No established occupational exposure limit for sodium citrate, but general dust exposure limit guidance can be applied—typically 10 mg/m3 for nuisance dust.
Physical State: Solid
Color: White
Odor: Odorless
Odor Threshold: Not applicable
pH: Slightly acidic to neutral in water solution
Melting Point: Decomposes before melting
Boiling Point: Not applicable
Flash Point: Not flammable
Vapor Pressure: Not relevant for solid form
Relative Density: 1.7 g/cm3
Solubility: Easily soluble in water
Partition Coefficient: Not applicable
Decomposition Temperature: Decomposes at high heat
Viscosity: Not applicable for solids
Chemical Stability: Stable under normal temperature and pressure. Remains unchanged in dry environments.
Reactivity Profile: Strong acids can react with sodium citrate, producing citric acid and possibly releasing carbon dioxide.
Hazardous Reactions: No hazardous polymerization expected.
Conditions to Avoid: Keep away from sources of moisture, excessive heat, and acids.
Hazardous Decomposition Products: Sodium oxide and carbon dioxide may form when strongly heated.
Acute Toxicity: Oral ingestion typically leads to low toxicity. Doses required to cause effects are far higher than what is likely in workplace exposure.
Skin Corrosion/Irritation: Small chance of mild irritation on contact, especially if left on skin for an extended period.
Eye Damage/Irritation: Contact with eyes might cause redness or minor discomfort.
Respiratory Sensitization: Dust exposure can prompt mild respiratory symptoms, especially in sensitive individuals.
Chronic Effects: No known serious long-term effects from ordinary workplace exposure.
Carcinogenicity: Not recognized as a carcinogen in any major chemical safety database.
Aquatic Toxicity: Breaks down to sodium ions and citrate in water, both of which are naturally occurring.
Persistence and Degradability: Sodium citrate is biodegradable and does not accumulate in the environment.
Bioaccumulation: Not expected to bioaccumulate.
Ecotoxicity: Large releases may disrupt the pH balance of small water bodies but, under normal lab or industrial use, is not a significant threat.
Waste Disposal Methods: Dispose of in accordance with local environmental regulations. Small quantities often can be washed away with lots of water. Collect larger quantities for landfill or chemical waste processing. Avoid dumping large amounts into sewer systems.
Container Disposal: Rinse containers thoroughly before recycling or disposing, following local guidance.
UN Number: Not regulated under common transport guidelines for hazardous substances.
Shipping Name: Not classified as hazardous for transport.
Hazard Class: Not assigned a hazard class. Presents no threat during normal handling and shipping.
Packing Group: Not categorized for special packing requirements.
Special Precautions: Store away from moisture during shipment. Secure against container breach.
OSHA Status: Sodium citrate does not require specific hazard labeling under OSHA Hazard Communication Standard.
TSCA Inventory Status: Included on the U.S. TSCA chemical inventory.
REACH Status: Registered for use in Europe as an industrial chemical and food ingredient.
Other Regulations: Not on any prohibitive lists by EPA, NTP, IARC, or ACGIH. Considered safe under most global chemical management systems when handled according to good laboratory practice.
