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
795488
Potassium phosphate monobasic
anhydrous, free-flowing, Redi-Dri™, ACS reagent, ≥99%
Synonym(s):
Potassium dihydrogen phosphate, prim.-Potassium phosphate
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| Pack Size | SKU | Availability | Price |
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About This Item
Quality Level
grade
ACS reagent, anhydrous
product line
Redi-Dri™
assay
≥99%
form
powder or crystals
quality
free-flowing
impurities
≤0.01% Insoluble matter
loss
≤0.2% loss on drying, 105°C
pH
4.1-4.5 (25 °C, 5%)
pKa (25 °C)
(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
mp
252.6 °C (lit.)
solubility
water: soluble (208 g/l at 20 °C (68 °F))
density
2.338 g/mL at 25 °C (lit.)
anion traces
chloride (Cl-): ≤0.001%, sulfate (SO42-): ≤0.003%
cation traces
Fe: ≤0.002%, Na: ≤0.005%, heavy metals: ≤0.001% (by ICP)
SMILES string
[K+].OP(O)([O-])=O
InChI
1S/K.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1
InChI key
GNSKLFRGEWLPPA-UHFFFAOYSA-M
General description
Redi-Dri™ technology eliminates clumping and the need for complicated procedures to keep your salts free-flowing. Keeping your salts dry helps improve your results by giving accurate measurements and easier-to-handle salts and buffers. Rather than drying your salts in an oven or desiccator or breaking them apart manually, Redi-Dri™ ensures that your salts will remain easy-to-use for months without worrying about anti-caking agents. Even after repeated openings you can be assured that your results are always accurate. Redi-Dri™ saves you time, energy and money by keeping your salts usable for longer!
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 or crystals | form crystalline | form crystalline | form - |
| assay ≥99% | assay 99.5-100.5% | assay 98-100.5% dry basis | assay ≥99.0% |
| solubility water: soluble (208 g/l at 20 °C (68 °F)) | solubility water: soluble (208 g/l at 20 °C (68 °F)) | solubility water: 208 g/L at 20 °C | solubility - |
| Quality Level 200 | Quality Level - | Quality Level 200 | Quality Level 100 |
| grade ACS reagent, anhydrous | grade ACS reagent, anhydrous, puriss. p.a. | grade anhydrous | grade - |
| pH 4.1-4.5 (25 °C, 5%) | pH 4.2-4.5 (20 °C, 5%) | pH - | pH - |
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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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Global Trade Item Number
| SKU | GTIN |
|---|---|
| 795488-500G | 04061832958224 |
| 795488-2.5KG | 04061832958200 |
| 795488-1KG | 04061832958125 |
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How can I determine the shelf life / expiration / retest date of this product?
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Helpful?
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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?
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Are there any special storage conditions that must be maintained?
1 answer-
No, Redi-Dri™ products can be stored under the same conditions as the equivalent non-Redi-Dri™ products.
Helpful?
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How does Redi-Dri™ help keep salts and buffers free-flowing?
1 answer-
Redi-Dri™ products are specially handled and the bottle is specially designed to ensure that the product will remain dry without adding impurities or additives to the product. Ensuring that you receive the highest quality material that is easy to handle.
Helpful?
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How long will material remain free-flowing after it is opened?
1 answer-
While the exact amount of time your material will remain free-flowing can vary, this largely depends on the ambient storage conditions and how many times it is opened.
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