For some European Pharmacopoeia (Ph Eur or EP) procedures, a 0.2 Molar solution is required. So one would dissolve 40.84 grams of this product in some amount of pure water (e.g., 800 mL) in a 1 Liter volumetric flask, bring it to volume with additional pure water, and mix.
A 0.1 Molar solution would therefore require 20.42 grams in 1 Liter of solution.
1.04874
Potassium hydrogen phthalate
for analysis EMSURE® Reag. Ph Eur
Synonyme(s) :
Potassium hydrogen phthalate
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A propos de cet article
Formule empirique (notation de Hill) :
C8H5KO4
Numéro CAS:
Poids moléculaire :
204.22
UNSPSC Code:
12352106
EC Index Number:
212-889-4
NACRES:
NA.21
MDL number:
Assay:
≥99.5% dry basis (perchloric acid titration)
Grade:
reagent grade
Form:
solid
Solubility:
water: soluble (93 g/l (86 °F / 30 °C))
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grade
reagent grade
agency
reag. Ph. Eur.
product line
EMSURE®
assay
≥99.5% dry basis (perchloric acid titration)
form
solid
potency
>3200 mg/kg LD50, oral (Rat)
impurities
≤0.005% In water insoluble matter
loss
≤0.2% loss on drying, 105°C
pH
4.0 (20 °C, 50 g/L in H2O)
mp
295-300 °C
solubility
water: soluble (93 g/l (86 °F / 30 °C))
density
1.636 g/cm3
bulk density
900 kg/m3
anion traces
chloride (Cl-): ≤0.002%, sulfur compounds (as SO42-): ≤0.005%
cation traces
Cu: ≤0.0002%, Fe: ≤0.0005%, Na: ≤0.01%, Pb: ≤0.0005%, heavy metals (as Pb): ≤0.0005%
storage temp.
2-30°C
SMILES string
[K+].[O-]C(=O)c1c(cccc1)C(=O)[O-].[H+]
InChI
1S/C8H6O4.K/c9-7(10)5-3-1-2-4-6(5)8(11)12;/h1-4H,(H,9,10)(H,11,12);/q;+1/p-1
InChI key
IWZKICVEHNUQTL-UHFFFAOYSA-M
Application
- Coulometric method with titratable impurity analysis and mass balance method: This study presents a method to convert acidimetric purity to chemical purity for potassium hydrogen phthalate, which is validated using quantitative nuclear magnetic resonance (qNMR) techniques, enhancing the standards for analytical chemistry (Huang T et al., 2023).
- Triplet states of the nonlinear optical chromophore DCM in single crystals: Investigates the triplet excited states of the nonlinear optical chromophore DCM in potassium hydrogen phthalate single crystals, linking these states to single-molecule dark states, significant for the development of optical materials (Barbon A et al., 2009).
Analysis Note
Assay (Perchloric acid titration from dried substance): ≥ 99.5 %
Identity (IR-spectrum): passes test
In water insoluble matter: ≤ 0.005 %
Chloride (Cl): ≤ 0.002 %
Sulfur compounds (as SO₄): ≤ 0.005 %
Heavy metals (as Pb): ≤ 0.0005 %
Cu (Copper): ≤ 0.0002 %
Fe (Iron): ≤ 0.0005 %
Na (Sodium): ≤ 0.01 %
Pb (Lead): ≤ 0.0005 %
Loss on Drying (105°C): ≤ 0.2 %
Corresponds to Reag. Ph Eur
Identity (IR-spectrum): passes test
In water insoluble matter: ≤ 0.005 %
Chloride (Cl): ≤ 0.002 %
Sulfur compounds (as SO₄): ≤ 0.005 %
Heavy metals (as Pb): ≤ 0.0005 %
Cu (Copper): ≤ 0.0002 %
Fe (Iron): ≤ 0.0005 %
Na (Sodium): ≤ 0.01 %
Pb (Lead): ≤ 0.0005 %
Loss on Drying (105°C): ≤ 0.2 %
Corresponds to Reag. Ph Eur
Legal Information
EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany
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Cet article | |||
|---|---|---|---|
| form solid | form crystals | form crystals | form powder or crystals |
| assay ≥99.5% dry basis (perchloric acid titration) | assay - | assay - | assay ≥99.95% |
| solubility water: soluble (93 g/l (86 °F / 30 °C)) | solubility - | solubility - | solubility - |
| Quality Level 300 | Quality Level 100 | Quality Level 100 | Quality Level 200 |
| grade reagent grade | grade certified reference material | grade certified reference material | grade - |
| cation traces Cu: ≤0.0002%, Na: ≤0.01%, heavy metals (as Pb): ≤0.0005%, Fe: ≤0.0005%, Pb: ≤0.0005% | cation traces - | cation traces - | cation traces Al: <0.0005%, Ca: <0.005%, Cu: <0.0005%, Fe: <0.0005%, Mg: <0.0005%, NH4+: <0.05%, Na: <0.005%, Pb: <0.001%, Zn: <0.0005% |
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Classe de stockage
11 - Combustible Solids
wgk
WGK 1
flash_point_f
387.1 °F - Pensky-Martens closed cup
flash_point_c
197.3 °C - Pensky-Martens closed cup
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How is this scaled when mixing it with water? How much of the salt is needed in 1 L water?
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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.
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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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