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
60220
Potassium phosphate monobasic
buffer substance, anhydrous, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99.5-100.5%
Synonym(s):
Potassium dihydrogen phosphate, prim.-Potassium phosphate
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| Size/SKU | Availability | Price |
|---|---|---|
500 g | Available to ship TODAY | $155.00 |
1 kg | Available to ship TODAY | $227.00 |
2.5 kg | Available to ship TODAY | $381.00 |
About This Item
$155.00
Available to ship TODAYDetails
Quality Segment
agency
reag. ISO, reag. Ph. Eur.
grade
ACS reagent, anhydrous, puriss. p.a.
assay
99.5-100.5%
form
crystalline
impurities
≤0.001% total nitrogen (N)
loss
≤0.2% loss on drying, 105 °C
pH
4.2-4.5 (20 °C, 5%)
pKa (25 °C)
(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
mp
252.6 °C (lit.)
solubility
water: 0.5 g/10 mL, clear, colorless to light yellow
density
2.338 g/mL at 25 °C (lit.)
anion traces
chloride (Cl-): ≤5 mg/kg, sulfate (SO42-): ≤30 mg/kg
cation traces
As: ≤0.5 mg/kg, Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤15 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Na: ≤50 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg, 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
Application
- to prepare the working luminol solution to study the prooxidant activity in the chemiluminescent system luminol–H2O2
- in phosphate buffer saline (PBS) to culture embryonic stem cells (ESCs) and generate embryoid bodies
- in PBS to prepare polydimethylsiloxane (PDMS) substrate
1 of 1
This Item | ||
|---|---|---|
| description buffer substance, anhydrous, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99.5-100.5% | description anhydrous, free-flowing, Redi-Dri™, ReagentPlus®, ≥99.0% (titration) | description anhydrous, free-flowing, Redi-Dri™, ACS reagent, ≥99% |
| grade puriss. p.a., ACS reagent, anhydrous | grade anhydrous | grade anhydrous, ACS reagent |
| assay 99.5-100.5% | assay ≥99.0% (titration) | assay ≥99% |
| Quality Level 100 | Quality Level 100 | Quality Level 200 |
| form crystalline | form crystalline | form powder or crystals |
| solubility water: 0.5 g/10 mL, clear, colorless to light yellow | solubility water: 100 mg/mL, clear, colorless | solubility water: soluble (208 g/l at 20 °C (68 °F)) |
| pH 4.2-4.5 (20 °C, 5%) | pH - | pH 4.1-4.5 (25 °C, 5%) |
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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 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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