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.
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
71640
Sodium phosphate dibasic
puriss. p.a., ACS reagent, anhydrous, ≥99.0% (T)
Synonym(s):
sec-Sodium phosphate, Disodium hydrogen phosphate, Disodium phosphate, Sodium hydrogenphosphate
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
250 g | Check Cart for Availability | $42.50 |
1 kg | Check Cart for Availability | $130.00 |
5 kg | Check Cart for Availability | $511.00 |
About This Item
Quality Segment
grade
ACS reagent, puriss. p.a.
assay
≥99.0% (T)
form
powder (or crystals)
impurities
≤0.001% total nitrogen (N)
loss
≤0.2% loss on drying, 105 °C
pH
8.7-9.3 (25 °C, 50 mg/mL in H2O)
pKa (25 °C)
(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
anion traces
chloride (Cl-): ≤10 mg/kg, sulfate (SO42-): ≤50 mg/kg
cation traces
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: ≤50 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg, heavy metals: ≤0.001% (by ICP-OES)
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
General description
Application
- As an efficient and low-cost catalyst for the synthesis of 2-aminochrome by the reaction between aromatic aldehyde, malononitrile, and α- or β-naphthol under solvent-free conditions.
- As a buffer in the synthesis of cyclic, acyclic enones and α, β-unsaturated aldehydes from trimethylsilyl enol ethers by using palladium as a catalyst and oxone as oxidant.
- As an efficient catalyst in the synthesis of 3,4-dihydropyrano[3,2-c] chromenes from aldehydes, malononitrile and 4-hydroxycoumarin.
- As a phosphorous precursor with the phosphoric acid in the synthesis of hydroxyapatite by precipitation method using anionic surfactant SDS (sodium dodefcyl sulfate).
1 of 1
This Item | |||
|---|---|---|---|
| form powder (or crystals) | form powder | form powder | form powder |
| assay ≥99.0% (T) | assay ≥99.0% | assay ≥99% | assay ≥99.0% |
| grade ACS reagent, puriss. p.a. | grade ACS reagent | grade ACS reagent, anhydrous | grade anhydrous |
| anion traces chloride (Cl-): ≤10 mg/kg, sulfate (SO42-): ≤50 mg/kg | anion traces sulfate (SO42-): ≤0.005% | anion traces sulfate (SO42-): ≤0.005% | anion traces - |
| cation traces Cd: ≤5 mg/kg, Cr: ≤5 mg/kg, Fe: ≤5 mg/kg, Mg: ≤5 mg/kg, Ni: ≤5 mg/kg, Zn: ≤5 mg/kg, Ca: ≤10 mg/kg, Cu: ≤5 mg/kg, Mn: ≤5 mg/kg, heavy metals: ≤0.001% (by ICP-OES), Co: ≤5 mg/kg, Pb: ≤5 mg/kg, K: ≤50 mg/kg | cation traces Fe: ≤0.002%, heavy metals: ≤0.001% (by ICP-OES) | cation traces Fe: ≤0.002%, heavy metals: ≤0.001% (by ICP-OES) | cation traces - |
| impurities ≤0.001% total nitrogen (N) | impurities ≤0.002% Chloride (Cl), ≤0.01% Insoluble matter | impurities ≤0.002% Chloride (Cl), ≤0.01% Insoluble matter | impurities - |
Still not finding the right product?
Explore all of our products under Sodium phosphate dibasic
flash_point_f
Not applicable
flash_point_c
Not applicable
Storage Class
11 - Combustible Solids
Choose from one of the most recent versions:
Already Own This Product?
Find documentation for the products that you have recently purchased in the Document Library.
-
How can I determine the shelf life / expiration / retest date of this product?
1 answer-
Helpful?
-
-
How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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
Helpful?
-