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
795496
Potassium phosphate dibasic
anhydrous, free-flowing, Redi-Dri™, ACS reagent, ≥98%
Synonym(s):
Dipotassium hydrogenphosphate, Dipotassium phosphate, sec.-Potassium phosphate
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| Size/SKU | Availability | Price |
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About This Item
Quality Segment
grade
ACS reagent, anhydrous
agency
suitable for SM 5210
product line
Redi-Dri™
assay
≥98%
form
powder
quality
free-flowing
impurities
≤0.001% Nitrogen compounds (as N), ≤0.01% Insoluble matter
loss
≤1.0% loss on drying, 105°C
pH
8.5-9.6 (25 °C, 5% in solution)
pKa (25 °C)
(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
solubility
water: soluble
anion traces
chloride (Cl-): ≤0.003%, sulfate (SO42-): ≤0.005%
cation traces
Fe: ≤0.001%, Na: ≤0.05%, heavy metals: ≤5 ppm (by ICP-OES)
SMILES string
[K+].[K+].OP([O-])([O-])=O
InChI
1S/2K.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2
InChI key
ZPWVASYFFYYZEW-UHFFFAOYSA-L
General description
Application
Features and Benefits
- Increased efficiency – Eliminate time and effort of loosening hardened powders
- Safety – Avoid risks of using tools of force to break up clumps
- Economy – Faster preparation and solvation increase productivity and reduce costs
- Assured quality – Excellent, expert-tested quality with no anti-caking agents
- Flexible volumes – Available from research amounts to scale-up quantities
Legal Information
1 of 1
This Item | |||
|---|---|---|---|
| form powder | form powder or crystals | form powder | form powder or crystals |
| assay ≥98% | assay ≥99.0% (T) | assay ≥98% | assay ≥99.0% (T) |
| solubility water: soluble | solubility water: soluble (completely) | solubility water: soluble (completely) | solubility H2O: 1 M at 20 °C, clear, colorless |
| Quality Level 200 | Quality Level 300 | Quality Level 200 | Quality Level 200 |
| grade ACS reagent, anhydrous | grade ACS reagent, puriss. p.a. | grade ACS reagent | grade Molecular Biology |
| impurities ≤0.001% Nitrogen compounds (as N), ≤0.01% Insoluble matter | impurities ≤0.001% total nitrogen (N) | impurities ≤0.001% Nitrogen compounds (as N), ≤0.01% Insoluble matter | impurities DNases, none detected, RNases, none detected, insoluble matter, passes filter test, phosphatases, none detected, proteases, none detected |
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Storage Class
11 - Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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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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