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71402

Sigma-Aldrich

Sodium citrate tribasic dihydrate

BioUltra, for molecular biology

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Synonym(s):
Citric acid trisodium salt dihydrate, Trisodium citrate 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.25

grade

for molecular biology

product line

BioUltra

form

crystals

technique(s)

precipitation assay: suitable

impurities

DNases, none detected
RNases, none detected
insoluble matter, passes filter test
phosphatases, none detected
proteases, none detected
11-13% Water (Karl Fischer)

pH

7.5-9.0 (25 °C, 0.1 M in H2O)

 

(1) 3.138, (2) 4.76, (3) 6.40

mp

>300 °C (lit.)

solubility

H2O: 0.1 M at 20 °C, clear, colorless

anion traces

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

cation traces

Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤10 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
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
NH4+: ≤10 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

λ

0.1 M in H2O

UV absorption

λ: 260 nm Amax: 0.01
λ: 280 nm Amax: 0.01

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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This Item
C725471405C8532
Sodium citrate tribasic dihydrate BioUltra, for molecular biology

Sigma-Aldrich

71402

Sodium citrate tribasic dihydrate

Premium Grade
product line

BioUltra

product line

-

product line

-

product line

-

form

crystals

form

powder

form

powder

form

powder

technique(s)

precipitation assay: suitable

technique(s)

-

technique(s)

-

technique(s)

-

impurities

DNases, none detected, RNases, none detected, insoluble matter, passes filter test, phosphatases, none detected, proteases, none detected, 11-13% Water (Karl Fischer)

impurities

-

impurities

11-13% water (KFT)

impurities

-

pH

7.5-9.0 (25 °C, 0.1 M in H2O)

pH

7.5-9 (25 °C, 29.4 g/L)

pH

7.0-9.0 (25 °C, 50 mg/mL in H2O)

pH

7.5-9 (25 °C, 29.4 g/L)

Other Notes

Buffer component in the preparation of total ribosomal RNA from E. coli.

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

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