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
1.05099
Potassium phosphate dibasic trihydrate
for analysis EMSURE®
Synonym(s):
di-Potassium hydrogen phosphate trihydrate, Potassium phosphate dibasic
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
250 g | Estimated to ship TODAY | $142.00 |
1 kg | Estimated to ship TODAY | $356.00 |
5 kg | Estimated to ship onJune 24, 2026 | $1,250.00 |
50 kg | Estimated to ship onJune 24, 2026 | $11,570.00 |
About This Item
Product Name
di-Potassium hydrogen phosphate trihydrate, for analysis EMSURE®
Quality Segment
product line
EMSURE®
assay
≥99.0% (acidimetric)
form
solid
pH
9.2-9.4 (20 °C, 50 g/L in H2O)
mp
340 °C (anhydrous substance; decomposes)
bulk density
800 kg/m3
anion traces
chloride (Cl-): ≤0.001%, sulfate (SO42-): ≤0.005%
cation traces
As: ≤0.00005%, Fe: ≤0.0005%, N: ≤0.001%, Na: ≤0.1%, heavy metals (as Pb): ≤0.001%
storage temp.
15-25°C
SMILES string
[K+].[K+].[P](=O)([O-])([O-])O.O.O.O
InChI
1S/2K.H3O4P.3H2O/c;;1-5(2,3)4;;;/h;;(H3,1,2,3,4);3*1H2/q2*+1;;;;/p-2
InChI key
XQGPKZUNMMFTAL-UHFFFAOYSA-L
Analysis Note
pH-value (5 %; water): 9.1 - 9.3
Chloride (Cl): ≤ 0.001 %
Sulfate (SO₄): ≤ 0.005 %
Total nitrogen (N): ≤ 0.001 %
Heavy metals (as Pb): ≤ 0.001 %
As (Arsenic): ≤ 0.00005 %
Fe (Iron): ≤ 0.0005 %
Na (Sodium): ≤ 0.1 %
Other Notes
Legal Information
1 of 1
This Item | |||
|---|---|---|---|
| form solid | form solid | form powder or crystals | form powder or crystals |
| assay ≥99.0% (acidimetric) | assay ≥99.0% (acidimetric) | assay ≥99.0% | assay ≥99% |
| Quality Level 300 | Quality Level 100 | Quality Level 200 | Quality Level 200 |
| cation traces As: ≤0.00005%, N: ≤0.001%, heavy metals (as Pb): ≤0.001%, Fe: ≤0.0005%, Na: ≤0.1% | cation traces - | cation traces - | cation traces Fe: ≤10 ppm, heavy metals (as Pb): ≤5 ppm |
| pH 9.2-9.4 (20 °C, 50 g/L in H2O) | pH 9.2-9.4 (20 °C, 50 g/L in H2O) | pH 9.2-9.4 (25 °C, 50 g/L) | pH 9.2-9.4 (25 °C, 50 g/L) |
| mp 340 °C (anhydrous substance; decomposes) | mp 340 °C (anhydrous substance; decomposes) | 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 can I determine the shelf life / expiration / retest date of this product?
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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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