ChemicalBook >> CAS DataBase List >>Potassium hydrogen phthalate
Potassium hydrogen phthalate
- CAS No.
- 877-24-7
- Chemical Name:
- Potassium hydrogen phthalate
- Synonyms
- BUFFER;Potassium biphthalate;BUFFER SOLUTION;Potassium acid phthalate;Potassium hydrogen;KAP;PHOSPHATE BUFF, PH 7.5;Potassium hydrogen phthalate, acidimetric standard;KHP, Phthalic acid monopotassium salt, Potassium biphthalate, Potassium hydrogen phthalate;CIP2
- CBNumber:
- CB1132397
- Molecular Formula:
- C8H5KO4
- Molecular Weight:
- 204.22
- MDL Number:
- MFCD00146206
- MOL File:
- 877-24-7.mol
- MSDS File:
- SDS
Last updated:2026-01-13 11:13:04
| Product description | Number | Pack Size | Price |
| Potassium Hydrogen Phthalate Meets ACS Specifications GR ACS | PX1476 | 500G | $182 |
| Potassium Hydrogen Phthalate Meets ACS Specifications GR ACS | PX1476 | 2.5KG | $292 |
| CDKN3, GST tagged human recombinant, expressed in baculovirus infected Sf9 cells, ≥70% (SDS-PAGE), buffered aqueous glycerol solution | SRP5175 | 20 μg | $362 |
| Potassium Hydrogen Phthalate Meets ACS Specifications GR ACS | PX1476 | 12KG | $1520 |
| Phosphate buffer solution 0.1?M | P5244 | 100mL | $49.14 |
| More product size | |||
| 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 |
| PH | 4.00-4.02 (25.0℃±0.2℃, 0.05M) |
| Odor | Odorless |
| 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) |
| EWG's Food Scores | 1 |
| FDA UNII | GG9121M623 |
| EPA Substance Registry System | Monopotassium phthalate (877-24-7) |
| Absorption | cut-off at 309nm in H2O at 0.1M |
| UNSPSC Code | 41116121 |
| NACRES | ND.02 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315-H319 | |||||||||
| Precautionary statements | P264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313 | |||||||||
| 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 | |||||||||
| NFPA 704 |
|
Potassium hydrogen phthalate price More Price(89)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | PX1476 | Potassium Hydrogen Phthalate Meets ACS Specifications GR ACS | 877-24-7 | 500G | $182 | 2025-07-31 | Buy |
| Sigma-Aldrich | PX1476 | Potassium Hydrogen Phthalate Meets ACS Specifications GR ACS | 877-24-7 | 2.5KG | $292 | 2025-07-31 | Buy |
| Sigma-Aldrich | SRP5175 | CDKN3, GST tagged human recombinant, expressed in baculovirus infected Sf9 cells, ≥70% (SDS-PAGE), buffered aqueous glycerol solution | 20 μg | $362 | 2025-07-31 | Buy | |
| Sigma-Aldrich | PX1476 | Potassium Hydrogen Phthalate Meets ACS Specifications GR ACS | 877-24-7 | 12KG | $1520 | 2025-07-31 | Buy |
| Sigma-Aldrich | P5244 | Phosphate buffer solution 0.1?M | 877-24-7 | 100mL | $49.14 | 2025-07-31 | Buy |
Potassium hydrogen phthalate Chemical Properties,Uses,Production
Chemical Properties
white crystalline powder
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.
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
As primary standard for preparing volumetric alkali solutions, also as a buffer in pH determinations.
General Description
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
Global( 534)Suppliers
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| JIANGYIN SHELLCHEMICAL | 15312220685 | sales02@beikechem.cn | China | 219 | 58 |
| Hebei Chuanghai Biotechnology Co., Ltd | +8615350571055 | Sibel@chuanghaibio.com | China | 8753 | 58 |
| Hebei Chuanghai Biotechnology Co,.LTD | +86-13131129325 | sales1@chuanghaibio.com | China | 5242 | 58 |
| Hebei Zhuanglai Chemical Trading Co.,Ltd | +8613343047651 | admin@zlchemi.com | China | 3692 | 58 |
| Shanghai Daken Advanced Materials Co.,Ltd | +86-2158073036 | info@dakenam.com | China | 13799 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21597 | 55 |
| Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418679 +8618949832763 | info@tnjchem.com | China | 2988 | 55 |
| career henan chemical co | +86-0371-86658258 +8613203830695 | sales@coreychem.com | China | 29831 | 58 |
| Hubei xin bonus chemical co. LTD | 86-13657291602 | linda@hubeijusheng.com | CHINA | 22963 | 58 |
| Shenyang Simchoice Chemical Co.,Ltd | +86-024-23769576 +86-15040101888 | sales@simchoicechem.com | China | 254 | 58 |
View Lastest Price from Potassium hydrogen phthalate manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-02-06 | Potassium hydrogen phthalate
877-24-7
|
US $1.00-25.00 / kg | 1kg | 99+ | 80000 | JIANGYIN SHELLCHEMICAL | |
 |
2026-01-30 | Potassium hydrogen phthalate
877-24-7
|
US $10.00 / KG | 100KG | 99% | 100 mt | Hebei Chuanghai Biotechnology Co., Ltd | |
 |
2025-05-26 | Potassium Hydrogen Phthalate
877-24-7
|
US $6.00 / kg | 1kg | 99% | 10000kg | Hebei Chuanghai Biotechnology Co,.LTD |
-
- Potassium hydrogen phthalate
877-24-7
- US $1.00-25.00 / kg
- 99+
- JIANGYIN SHELLCHEMICAL
-
- Potassium hydrogen phthalate
877-24-7
- US $10.00 / KG
- 99%
- Hebei Chuanghai Biotechnology Co., Ltd
-
- Potassium Hydrogen Phthalate
877-24-7
- US $6.00 / kg
- 99%
- Hebei Chuanghai Biotechnology Co,.LTD
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