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Potassium hydrogen phthalate

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Potassium hydrogen phthalate Basic information

Product Name:
Potassium hydrogen phthalate
CAS:
877-24-7
MF:
C8H5KO4
MW:
204.22
EINECS:
212-889-4
Mol File:
877-24-7.mol
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Potassium hydrogen phthalate Chemical Properties

Melting point:
295-300 °C (dec.)(lit.)
Boiling point:
98.5-99.5 ;°C/740 ;mmHg(lit .)
Density 
1.006 g/mL at 20 °C
storage temp. 
Store at RT.
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.
InChIKey
IWZKICVEHNUQTL-UHFFFAOYSA-M
CAS DataBase Reference
877-24-7(CAS DataBase Reference)
EPA Substance Registry System
Monopotassium phthalate (877-24-7)
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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
34
TSCA 
Yes
HS Code 
29173990
Toxicity
LD50 orally in Rabbit: > 3200 mg/kg

MSDS

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Potassium hydrogen phthalate Usage And Synthesis

Chemical Properties

white crystalline powder

Uses

As primary standard for preparing volumetric alkali solutions, also as a buffer in pH determinations.

Purification Methods

Crystallise it first from a dilute aqueous solution of K2CO3, then H2O (3mL/g) between 100o and 0o. Before being used as a standard in volumetric analysis, analytical grade potassium hydrogen phthalate should be dried at 120o for 2hours, then allowed to cool in a desiccator. [Beilstein 9 IV 3169.]

Potassium hydrogen phthalate Preparation Products And Raw materials

Raw materials

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Potassium hydrogen phthalateSupplierMore

Shanghai Aladdin Bio-Chem Technology Co.,LTD Gold
Tel:
021-20337333-801
Email:
market@aladdin-e.com
J & K SCIENTIFIC LTD.
Tel:
010-82848833- ;010-82848833-
Email:
jkinfo@jkchemical.com;market6@jkchemical.com
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel:
21-61259100-
Email:
sh@meryer.com
3B Pharmachem (Wuhan) International Co.,Ltd.
Tel:
821-50328103-801
Email:
3bsc@sina.com
Alfa Aesar
Tel:
400-610-6006; 021-67582000
Email:
saleschina@alfa-asia.com
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