ChemicalBook > CAS DataBase List > Potassium hydrogen phthalate

Potassium hydrogen phthalate

Product Name
Potassium hydrogen phthalate
CAS No.
877-24-7
Chemical Name
Potassium hydrogen phthalate
Synonyms
PBS;BUFFER;Potassium biphthalate;PHOSPHATE BUFFER SOLUTION;BUFFER SOLUTION;Potassium acid phthalate;Potassium hydrogen;KAP;PHOSPHATE BUFF, PH 7.5;Potassium hydrogen phthalate, acidimetric standard
CBNumber
CB1132397
Molecular Formula
C8H5KO4
Formula Weight
204.22
MOL File
877-24-7.mol
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Potassium hydrogen phthalate Property

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
bulk density
900kg/m3
storage temp. 
Store at +5°C to +30°C.
solubility 
H2O: 100 mg/mL, clear, colorless
form 
Solid
color 
White
Odor
Odorless
PH Range
3.8 - 4.0 (5% aq. sol.)
PH
4.00-4.02 (25.0℃±0.2℃, 0.05M)
Water Solubility 
80 G/L (20 ºC)
Merck 
14,7612
BRN 
3637128
Stability:
Stable. Incompatible with strong oxidizing agents.
InChIKey
IWZKICVEHNUQTL-UHFFFAOYSA-M
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
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Safety

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 
Yes
HS Code 
29173990
Toxicity
LD50 orally in Rabbit: > 3200 mg/kg
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P337+P313IF eye irritation persists: Get medical advice/attention.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
PX1476
Product name
Potassium Hydrogen Phthalate
Purity
Meets ACS Specifications GR ACS
Packaging
125G
Price
$144
Updated
2024/03/01
Sigma-Aldrich
Product number
PX1476
Product name
Potassium Hydrogen Phthalate
Purity
Meets ACS Specifications GR ACS
Packaging
500G
Price
$174
Updated
2024/03/01
Sigma-Aldrich
Product number
PX1476
Product name
Potassium Hydrogen Phthalate
Purity
Meets ACS Specifications GR ACS
Packaging
2.5KG
Price
$278
Updated
2024/03/01
Sigma-Aldrich
Product number
PX1476
Product name
Potassium Hydrogen Phthalate
Purity
Meets ACS Specifications GR ACS
Packaging
12KG
Price
$1450
Updated
2024/03/01
Sigma-Aldrich
Product number
P5244
Product name
Phosphate buffer solution
Purity
0.1?M
Packaging
100mL
Price
$55.1
Updated
2024/03/01
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Potassium hydrogen phthalate Chemical Properties,Usage,Production

Chemical Properties

white crystalline powder

Uses

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

Uses

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.

Uses

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.

General Description

SRM 2185_cert SRM 2185 _SDS

Flammability and Explosibility

Not classified

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

Potassium hydroxide Phthalic anhydride

Preparation Products

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View Lastest Price from Potassium hydrogen phthalate manufacturers

Hebei Zhuanglai Chemical Trading Co.,Ltd
Product
Potassium hydrogen phthalate 877-24-7
Price
US $70.00/kg
Min. Order
1kg
Purity
99
Supply Ability
5000
Release date
2024-06-06
Hebei Mojin Biotechnology Co.,Ltd
Product
Potassium hydrogen phthalate 877-24-7
Price
US $0.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
50000KG/month
Release date
2024-05-23
Hebei Weibang Biotechnology Co., Ltd
Product
Potassium hydrogen phthalate 877-24-7
Price
US $10.00/KG
Min. Order
100KG
Purity
99%
Supply Ability
100 mt
Release date
2024-10-31

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  • BUFFER
  • BUFFER CONCENTRATE, PH 6.00
  • BUFFER CONCENTRATE, PH 7.00
  • BUFFER MIXTURE, PH 6.8
  • BUFFER O
  • BUFFER, PH 1.0
  • BUFFER, PH 1.00
  • BUFFER, PH 11.00
  • BUFFER, PH 1.2
  • BUFFER, PH 12.00
  • BUFFER, PH 12.45
  • BUFFER, PH 12.72
  • BUFFER, PH 1.68
  • BUFFER, PH 2.00
  • BUFFER, PH 10.00
  • BUFFER, PH 10.00, COLOR CODE BLUE
  • BUFFER, PH 1.07
  • BUFFER PH 10, BLUE
  • BUFFER, PH 2.5
  • BUFFER, PH 3.00
  • BUFFER SOLUTION PH 3.00
  • BUFFER SOLUTION PH 3.06
  • BUFFER SOLUTION PH 3.55
  • BUFFER SOLUTION PH 3.776
  • BUFFER SOLUTION, PH 4.0
  • BUFFER SOLUTION PH 4.00