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71405

Sigma-Aldrich

Sodium citrate tribasic dihydrate

puriss. p.a., ACS reagent, ≥99.0% (NT)

Synonym(s):
Trisodium citrate dihydrate, Citric acid trisodium salt dihydrate
Linear Formula:
HOC(COONa)(CH2COONa)2 · 2H2O
CAS Number:
Molecular Weight:
294.10
Beilstein:
6104939
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

Quality Level

grade

ACS reagent
puriss. p.a.

assay

≥99.0% (NT)

form

powder

impurities

11-13% water (KFT)

pH

7.0-9.0 (25 °C, 50 mg/mL in H2O)

mp

>300 °C (lit.)

solubility

water: soluble 29.4 g/L at 20 °C

anion traces

chloride (Cl-): ≤10 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Ca: ≤50 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤100 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
NH4+: ≤10 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg
heavy metals: ≤5 ppm (by ICP-OES)

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

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General description

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

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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