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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.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf
1.06566
Sodium phosphate dibasic
anhydrous 99.99 Suprapur®
Synonym(s):
Sodium phosphate dibasic, di-Sodium hydrogen phosphate, sec-Sodium phosphate, Disodium hydrogen phosphate, Disodium phosphate, Sodium hydrogenphosphate
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
100 g | Estimated to ship onJune 10, 2026 | $605.00 |
500 g | Estimated to ship onDecember 04, 2026 | $1,640.00 |
About This Item
Quality Segment
description
for inorganic trace analysis
assay
99.99%
form
solid
potency
>2000 mg/kg LD50, oral (Rat)
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)
solubility
77 g/L
bulk density
880 kg/m3
storage temp.
2-30°C
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
Analysis Note
Assay (acidimetric): ≥ 99.0 %
Chloride (Cl): ≤ 5 ppm
Sulfate (SO₄): ≤ 30 ppm
Total nitrogen (N): ≤ 10 ppm
As (Arsenic): ≤ 0.1 ppm
Ba (Barium): ≤ 10.0 ppm
Ca (Calcium): ≤ 0.50 ppm
Cd (Cadmium): ≤ 0.010 ppm
Ce (Cerium): ≤ 0.010 ppm
Co (Cobalt): ≤ 0.010 ppm
Cr (Chromium): ≤ 0.050 ppm
Cs (Cesium): ≤ 5 ppm
Cu (Copper): ≤ 0.010 ppm
Eu (Europium): ≤ 0.010 ppm
Fe (Iron): ≤ 0.05 ppm
Hg (Mercury): ≤ 0.05 ppm
K (Potassium): ≤ 2.0 ppm
La (Lanthanum): ≤ 0.010 ppm
Li (Lithium): ≤ 1.0 ppm
Mg (Magnesium): ≤ 0.10 ppm
Mn (Manganese): ≤ 0.010 ppm
Ni (Nickel): ≤ 0.050 ppm
Pb (Lead): ≤ 0.010 ppm
Rb (Rubidium): ≤ 5.0 ppm
Sm (Samarium): ≤ 0.010 ppm
Sr (Strontium): ≤ 0.50 ppm
Tl (Thallium): ≤ 0.01 ppm
Y (Yttrium): ≤ 0.010 ppm
Yb (Ytterbium): ≤ 0.010 ppm
Zn (Zinc): ≤ 0.050 ppm
Legal Information
1 of 1
This Item | |||
|---|---|---|---|
| form solid | form powder | form - | form powder or crystals |
| assay 99.99% | assay ≥98.0% (T) | assay - | assay ≥99.0% |
| solubility 77 g/L | solubility water: soluble 50 mg/mL at 25 °C | solubility - | solubility water: soluble 100 mg/mL |
| Quality Level 100 | Quality Level 300 | Quality Level 200 | Quality Level 200 |
| pH 8.7-9.3 (20 °C, 10 g/L in H2O) | pH 8.8-9.4 (25 °C, 50 mg/mL in H2O) | pH - | pH 8.9-9.2 (25 °C, 50 g/L in water) |
| mp 250 °C (decomposition) | mp - | mp - | mp - |
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Storage Class
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
Certificates of Analysis (COA)
Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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
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