Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
1.06586
Sodium phosphate dibasic
anhydrous for analysis EMSURE® ACS,Reag. Ph Eur
Synonym(s):
Sodium phosphate dibasic, di-Sodium hydrogen phosphate, sec-Sodium phosphate, Disodium hydrogen phosphate, Disodium phosphate, Sodium hydrogenphosphate
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About This Item
Recommended Products
grade
ACS reagent
Quality Level
Agency
reag. Ph. Eur.
product line
EMSURE®
Assay
≥99.0% (alkalimetric)
form
solid
potency
>2000 mg/kg LD50, oral (Rat)
impurities
≤0.01% Insoluble matter
loss
≤ 0.2% loss on drying, 105 °C
pH
8.7-9.3 (20 °C, 10 g/L in H2O)
pKa (25 °C)
(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
mp
250 °C (decomposition)
bulk density
880 kg/m3
anion traces
chloride (Cl-): ≤0.002%
sulfate (SO42-): ≤0.005%
cation traces
Cu: ≤0.0003%
Fe: ≤0.001%
K: ≤0.01%
Pb: ≤0.001%
heavy metals: ≤0.001%
storage temp.
2-30°C
SMILES string
[Na+].[Na+].[H]OP([O-])([O-])=O
InChI
1S/2Na.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2
InChI key
BNIILDVGGAEEIG-UHFFFAOYSA-L
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Analysis Note
Insoluble matter: ≤ 0.01 %
pH-value (5 %; water, 25 °C): 8.7 - 9.3
Chloride (Cl): ≤ 0.002 %
Sulfate (SO₄): ≤ 0.005 %
Heavy metals (ACS): ≤ 0.001 %
Cu (Copper): ≤ 0.0003 %
Fe (Iron): ≤ 0.001 %
K (Potassium): ≤ 0.01 %
Pb (Lead): ≤ 0.001 %
Loss on Drying (105 °C): ≤ 0.2 %
Corresponds to ACS, Reag. Ph Eur
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Storage Class Code
13 - Non Combustible Solids
WGK
WGK 1
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
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