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Potassium phthalate monobasic

SIAL/179922 - ACS reagent, acidimetric standard

Synonym: KHP; Phthalic acid monopotassium salt; Potassium biphthalate; Potassium hydrogen phthalate

CAS Number: 877-24-7
Empirical Formula (Hill Notation): C8H5KO4
Molecular Weight: 204.22
EC Number: 212-889-4
MDL Number: MFCD00013070
Linear Formula: HOOCC6H4COOK
Product Type: Chemical
Catalog Number PKG Qty. Price Quantity
45-179922-100G 100 g
 $37.50
1/EA		 Add To Favorites
45-179922-500G 500 g
 $120.00
1/EA		 Add To Favorites
45-179922-1KG 1 kg
 $180.00
1/EA		 Add To Favorites
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.

This image depicts SKU: 179922-100G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.

This image depicts SKU: 179922-500G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.

This image depicts SKU: 179922-1KG

 

assay 99.95-100.05% dry basis
cation traces Fe: ≤5 ppm
  heavy metals: ≤5 ppm (by ICP)
  Na: ≤0.005%
form crystals
functional group carboxylic acid
grade ACS reagent
impurities ≤0.002% S compounds
  ≤0.003% Cl compounds
  ≤0.005% insolubles
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
mp 295-300 °C (dec.) (lit.)
pH 4.00-4.02 (25.0 °C±0.2 °C, 0.05 M)
quality acidimetric standard
Quality Level 200 
SMILES string [K+].OC(=O)c1ccccc1C([O-])=O
solubility water: soluble (93 g/l at 30 °C (86 °F))
Application: Potassium phthalate monobasic may be used as a primary standard in acidimetric titration and also to prepare potassium phthalate buffer solution for pH calibration.
Packaging: 1 kg in poly bottle
Packaging: 100, 500 g in poly bottle
RIDADR NONH for all modes of transport
WGK Germany WGK 3
Flash Point(F) 387.1 °F - Pensky-Martens c
Flash Point(C) 197.3 °C - Pensky-Martens c
Purity 99.95-100.05% dry basis
mp 295-300 °C (dec.) (lit.)
UNSPSC 12352100

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