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Merck
CN

C3434

Sodium citrate tribasic dihydrate

BioXtra, ≥99.0% (titration)

Synonym(s):

Citric acid trisodium salt dihydrate, Trisodium citrate dihydrate

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About This Item

Linear Formula:
HOC(COONa)(CH2COONa)2 · 2H2O
CAS Number:
6132-04-3
Molecular Weight:
294.10
EC Number:
200-675-3
UNSPSC Code:
12161700
PubChem Substance ID:
24892616
Beilstein/REAXYS Number:
6104939
MDL number:
MFCD00150031

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Product Name

Sodium citrate tribasic dihydrate, BioXtra, ≥99.0% (titration)

InChI key

NLJMYIDDQXHKNR-UHFFFAOYSA-K

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

SMILES string

O.O.[Na+].[Na+].[Na+].OC(CC([O-])=O)(CC([O-])=O)C([O-])=O

product line

BioXtra

assay

≥99.0% (titration)

form

powder or crystals

impurities

Insoluble matter, passes filter test

pH

7.5-9.0 (20 °C, 0.1 M in H2O)

mp

>300 °C (lit.)

solubility

H2O: 0.1 M at 20 °C, clear, colorless

anion traces

chloride (Cl-): ≤0.001%
sulfate (SO42-): ≤0.005%

cation traces

Al: ≤0.0005%
As: ≤0.00001%
Ba: ≤0.0005%
Bi: ≤0.0005%
Ca: ≤0.005%
Cd: ≤0.0005%
Co: ≤0.0005%
Cr: ≤0.0005%
Cu: ≤0.0005%
Fe: ≤0.0005%
K: ≤0.01%
Li: ≤0.0005%
Mg: ≤0.0005%
Mn: ≤0.0005%
Mo: ≤0.0005%
NH4+: ≤0.001%
Ni: ≤0.0005%
Pb: ≤0.0005%
Zn: ≤0.0005%

absorption

≤0.010 at 260 in H2O at 0.1 M
≤0.010 at 280

Quality Level

200

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Biochem/physiol Actions

Sodium citrate can act as a buffering agent, resisting changes in pH. Used in blood collection tubes, the citrate chelates calcium ions in blood and thereby disrupts blood clotting. Citrate is a intermediate in the TCA cycle and fatty acid synthesis. Citrate is an allosteric modulator of acetyl-CoA carboxylase, the enzyme that regulates the conversion of acetyl-CoA to malonyl-CoA.

Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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Certificates of Analysis (COA)

Lot/Batch Number
BCCB2895
BCBX5999
BCBW8620
BCBW4024
BCBV3599

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