25116

Sodium citrate tribasic dihydrate

puriss., meets analytical specification of Ph. Eur., BP, USP, FCC, E331, 99-100.5% (calc. to the dried substance)

• Synonym(s): Citric acid trisodium salt dihydrate, Trisodium citrate dihydrate
• Linear Formula: HOC(COONa)(CH₂COONa)₂ · 2H₂O
• CAS Number: 6132-04-3
• Molecular Weight: 294.10
• Beilstein/REAXYS Number: 6104939
• EC Number: 200-675-3
• MDL number: MFCD00150031
• UNSPSC Code: 12352100
• PubChem Substance ID: 57648115
• NACRES: NA.21

Properties

• grade: puriss.
• Quality Level: 200
• assay: 99-100.5% (calc. to the dried substance)
• quality: meets analytical specification of Ph. Eur., BP, USP, FCC, E331
• impurities: Residual solvent, in accordance; acidity or alkalinity, complies; ≤0.0005% heavy metals (as Pb); ≤0.04% free alkali (as NaOH); ≤0.06% free acid (as C₆H₈O₇); 11.0-13.0 water (Karl Fischer)
• loss: 11-13% loss on drying, 180 °C, 18 h
• pH: 7.5-9.0 (20 °C, 5%)
• mp: >300 °C (lit.)
• anion traces: chloride (Cl^-): ≤30 mg/kg; oxalate (as oxalic acid): ≤100 mg/kg; sulfate (SO₄^2-): ≤50 mg/kg; tartrate (C₄H₄O₆^2-): in accordance
• cation traces: As: ≤1 mg/kg; Cu: ≤10 mg/kg; Fe: ≤10 mg/kg; Hg: ≤1 mg/kg; Pb: ≤1 mg/kg; Zn: ≤10 mg/kg
• suitability: alkaline for reaction against litmus; complies for appearance of solution; complies for reaction against H₂SO₄
• SMILES string: O.O.[Na+].[Na+].[Na+].OC(CC([O-])=O)(CC([O-])=O)C([O-])=O
• InChI: 1S/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/q;3*+1;;/p-3
• InChI key: NLJMYIDDQXHKNR-UHFFFAOYSA-K

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Gloves, type N95 (US)