Potassium hydrogen phthalate CAS#877-24-7

CAS Number: 877-24-7
Chemical Formula: C8H5KO4
Synonyms:

Potassium hydrogen phthalate, reagent ACS, acidimetric standard
POTASSIUM ACID PHTHALATE BIO-REFINED
POTASSIUM ACID PHTHALATE PRIMARY STANDARD (ACS)

Appearance: White Powder

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Potassium hydrogen phthalate CAS#877-24-7

Potassium hydrogen phthalate [KHP; pH(S) = 4.005 (25 °C)] is a certified secondary standard reference material used as a calibration buffer standard for pH instruments or pH electrodes.

Potassium hydrogen phthalate Chemical Properties

Melting point	295-300 °C (dec.) (lit.)
Boiling point	98.5-99.5 ;°C/740 ;mmHg(lit .)
bulk density	900kg/m3
density	1.006 g/mL at 20 °C
storage temp.	Store at +5°C to +30°C.
solubility	H2O: 100 mg/mL, clear, colorless
form	Solid
color	White
Odor	Odorless
PH	4.00-4.02 (25.0℃±0.2℃, 0.05M)
PH Range	3.8 - 4.0 (5% aq. sol.)
Water Solubility	80 G/L (20 ºC)
Merck	14,7612
BRN	3637128
Stability:	Stable. Incompatible with strong oxidizing agents.
Cosmetics Ingredients Functions	BUFFERING
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
InChIKey	IWZKICVEHNUQTL-UHFFFAOYSA-M
SMILES	[K+].OC(=O)c1ccccc1C([O-])=O
LogP	-2.73
CAS DataBase Reference	877-24-7(CAS DataBase Reference)
EPA Substance Registry System	Monopotassium phthalate (877-24-7)
Absorption	cut-off at 309nm in H2O at 0.1M

Safety Information

Hazard Codes	Xi,C,T
Risk Statements	36/38-36/37/38-34-61-60
Safety Statements	26-36-24/25-22-45-36/37/39-53
RIDADR	UN 1789 8/PG 3
WGK Germany	1
RTECS	CZ4326000
F	34
TSCA	TSCA listed
HS Code	29173990
Storage Class	13 - Non Combustible Solids
Toxicity	LD50 orally in Rabbit: > 3200 mg/kg

Product Application Of Potassium hydrogen phthalate CAS#877-24-7

As a primary standard for preparing volumetric alkali solutions and as a buffer in pH determinations. Potassium hydrogen phthalate is used as a primary standard for acid- base titrations as well as for calibrating pH meters. It acts as a buffer in pH determination. It finds application as a useful standard for total organic carbon testing.

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