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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 71474Generated: October 23, 2026

Sodium Citrate Dihydrate

CITRIC ACID MONO · SODIUM CITRATE TRIBASIC DIHYDRATE · TRI-SODIUM CITRATE DIHYDRATE · SODIUM CITRATE, DIHYDRATE · SodiuM Citrate (AS) · SODIUM CITRATE TRISODIUM SALT DIHYDRATE · NATRII CITRAS · TRI-SODIUM CITRATE 2H2O

https://huagongshe.com/en/chemical/71474

Sodium Citrate Dihydrate molecular structure

Identifiers & Physical Properties

CAS No.6132-04-3
Molecular formulaC6H9Na3O9
Average molar mass294.1 g/mol
Monoisotopic mass293.99396471 g/mol
SMILESO.O.O=C([O-])CC(O)(CC(=O)[O-])C(=O)[O-].[Na+].[Na+].[Na+]
InChIKeyNLJMYIDDQXHKNR-UHFFFAOYSA-K
PubChem CID71474
ChEBICHEBI:32142
EC No.612-118-5
DTXSIDDTXSID1049437

Chemical & Physical Properties

Topological polar surface area143
Hydrogen bond donors3
Hydrogen bond acceptors9
Rotatable bonds2
Heavy atoms18
Formal charge0
Complexity211
Chemical classesMetals -> Organic Acids, Metal Salts
SolubilitySolubility in water, g/100ml: 77H2O: 100 mg/mL720 g/L (25 ºC)
Animal DrugsPharmaceuticals -> UK Veterinary Medicines Directorate List
Decomposition150 °C
Physical DescriptionWhite odorless solid[Merck Index] Colorless odorless crystalline powder[Alfa Aesar MSDS]WHITE SOLID IN VARIOUS FORMS.
Melting point>300 °C(lit.)
Density1.76
Bulk density600kg/m3
FEMA3026 | SODIUM CITRATE
Flash point173.9 °C
Storage conditionsStore at +5°C to +30°C.
Physical statepowder
pKa (acidity coefficient)6.40
Colorwhite
OdorOdorless
PH Range7.5 - 9 at 29.4 g/l at 25 °C
pH7.0-9.0 (25℃, 50mg/mL in H2O)
Biological sourcesynthetic
λmaxλ: 260 nm Amax: 0.01λ: 280 nm Amax: 0.01
Merck14,8602
BRN6104939
StabilityStable. Incompatible with bases, reducing agents, oxidizing agents.
Cosmetics Ingredients FunctionsCHELATINGFRAGRANCEBUFFERING
InChI1S/C6H8O7.3Na.2H2O/c7-3(8)1-6(13,5(11)12)2-4(9)10/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12)2*1H2/q3*+1/p-3
InChIKeyNLJMYIDDQXHKNR-UHFFFAOYSA-K
SMILESO.O.[Na+].[Na+].[Na+].OC(CC([O-])=O)(CC([O-])=O)C([O-])=O
LogP (partition coefficient)-1.72
CAS DataBase Reference6132-04-3(CAS DataBase Reference)
FDA UNIIB22547B95K
EPA Substance Registry System1,2,3-Propanetricarboxylic acid, 2-hydroxy-, trisodium salt, dihydrate (6132-04-3)
Absorption≤0.015 at 260nm≤0.015 at 280nm
UNSPSC Code41116107
NACRESNA.25
GHS pictogramGHS05,GHS07
Signal wordWarning
GHS hazard statementsH318-H319
GHS precautionary statementsP264-P280i-P305+P351+P338-P337+P313-P310a
Personal protective equipment (PPE)Eyeshields, Gloves, type N95 (US)
Hazard symbolsXi
Risk statements (R)37/38-41-36/37/38
Safety statements (S)26-36/37/39-24/25-36
Water hazard class (WGK)1
RTECS numberGE7810000
TSCA inventory statusYes
Customs code2918 15 00
Storage class11 - Combustible Solids
ToxicityLD50 orally in Rabbit: > 8000 mg/kg

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 97% (520 of 536) of all reports.Not ClassifiedAggregated GHS information provided per 536 reports by companies from 4 notifications to the ECHA C&L Inventory.
Regulatory informationChemical: 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, trisodium salt, dihydrateTrisodium citrate dihydrate: Does not have an individual approval but may be used under an appropriate group standard
Other safety informationIMAP assessments - 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, trisodium salt, dihydrate: Human health tier I assessment
Fire hazardsCombustible.
Hazards summaryAn eye and respiratory tract irritant[ICSC] May cause irritation[Alfa Aesar MSDS] See Sodium citrate, anhydrous.
EPA Safer ChemicalChemical: Sodium citrate, dihydrate
Chemical DangersThe solution in water is a weak base.
Hazard Classes and CategoriesNot Classified
Fire fightingUse water spray, powder.
First aid measuresFresh air, rest.Rinse and then wash skin with water and soap.First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.Rinse mouth.
Spillage disposalSweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water.
Eye PreventionWear safety spectacles.
Fire PreventionNO open flames.
Inhalation RiskEvaporation at 20 °C is negligiblea nuisance-causing concentration of airborne particles can, however, be reached quickly when dispersed.
Ingestion PreventionDo not eat, drink, or smoke during work.
Inhalation PreventionUse ventilation (not if powder).
Effects of Short Term ExposureThe substance is irritating to the eyes and respiratory tract.
Exposure routesThe substance can be absorbed into the body by inhalation of its aerosol and by ingestion.
Signs and SymptomsCough. Sore throat.Redness.
Personal protective equipment (PPE)Eyeshields, Gloves, type N95 (US)
Water hazard class (WGK)1
TSCA inventory statusYes
RTECS numberGE7810000
Customs code2918 15 00
ToxicityLD50 orally in Rabbit: > 8000 mg/kg
Risk statements (R)37/38-41-36/37/38
Signal wordWarning
GHS pictogramGHS05,GHS07
Hazard symbolsXi
Safety statements (S)26-36/37/39-24/25-36
Storage class11 - Combustible Solids
GHS hazard statementsH318-H319
GHS precautionary statementsP264-P280i-P305+P351+P338-P337+P313-P310a

Applications & Uses

Uses

It can be used as Ph adjusting agents and emulsifying enhancers applied to jam, candy, jelly and ice cream; its combination with citric acid has an effect of alleviating tour; it also has effects on forming complex with metal ions. China rules that it can be applied to various types of food with appropriate usage according to the absolute necessity.It can be used as a food additive, as complex agent and buffering agent in electroplating industry; at the field of pharmaceutical industry, it is used for the manufacturing of anti-clotting drugs; and used as the detergent additives in light industry.It is used as the analysis agents used for chromatography analysis and can also used for preparing bacterial culture medium; moreover, it can also be applied into pharmaceutical industry.The product can be used for the flavoring processing of food, as stabilizers, buffers and deputy complex-forming agents in non-toxic electroplating industry; at pharmaceutical industry, it is used as anti-clotting agent, phlegm drugs and diuretics drugs. It can also be used in brewing, injection, newspaper and movies medicines.

Uses

Anticoagulant for collection of blood. In photography; as sequestering agent to remove trace metals; as emulsifier, acidulant and sequestrant in foods.

Uses

An anticoagulant also used as a biological buffer

Uses

Trisodium citrate dihydrate, is widely applied in food, beverages and fillers as a buffering, sequestering or an emulsifying agent. It used as an anticoagulant in blood transfusions, osmotic laxative, functional fluids, solvents cleaning, furnishing care products, laundry dishwashing products and cleaning automobile radiators.

Uses

Sodium citrate is chiefly used as a food additive, usually for flavor or as a preservative.

General Description

Sodium citrate tribasic dihydrate is the tribasic dihydrate sodium salt of citric acid.