Potassium Acid Phthalate, ACS Grade


Potassium Acid Phthalate, also known as Potassium Hydrogen Phthalate, Potassium Biphthalate, Monopotassium Phthalate, and Phthalic Acid Monopotassium Salt, has the chemical formula C8H5KO4. It appears as colorless or white crystals or crystalline powder and is slightly soluble in Water at ambient conditions. When heated to decomposition, it emits oxides of carbon such as Carbon monoxide (CO), Carbon dioxide (CO2). An ACS Grade reagent is a chemical that meets the purity requirements of the American Chemical Society (ACS). It is generally equivalent to the Analytical Reagent Grade. For dependable, consistent, and repeatable findings, ACS Grade reagents can be utilized in high-quality research labs. In the United States of America (USA), Lab Alley sells its high-quality Potassium Acid Phthalate, ACS Grade or Potassium Hydrogen Phthalate, ACS Grade online at


Potassium Acid Phthalate, ACS Grade Features:

Assay 99.95-100.05%
pH of a 0.05 M Solution @ 25.0° 0.2°C 4.00-4.02
Insoluble Matter 0.005%
Chloride Compounds (as Cl) 0.003%
Sulfur Compounds (as S) 0.002%
Heavy Metals (as Pb) 5 ppm
Iron 5 ppm
Sodium (Na) 0.005%
Common Uses
  • Reagent
  • Volumetric alkali solutions
Commercial/Industrial Application
  • Inert ingredient in pesticides
  • Chemical precursor
Safety and Handling

Please contact us to request a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for Potassium Acid Phthalate 1 Standard ACS.

Product Ordering Options, Prices, Bulk Sizes & Shipping

You can buy Potassium Acid Phthalate, ACS Grade for $62 online, locally or call 512-668-9918 to order bulk sizes. Your packages will be shipped in 1-2 business days via UPS or LTL. Lab Alley Brand Potassium Acid Phthalate, ACS Grade is for sale in bulk sizes and is in stock. Handy individual consumer size containers for DIY projects are leak resistant. This high quality compound is made in America. It is a high purity chemical substance that is ideally suited for scientific, development, analytical, clinical, medical, research and testing applications. Potassium Acid Phthalate, ACS Grade is delivered quickly to laboratories, factories and businesses in safe chemical resistant containers. 

Manufacturing size drums, IBC totes, pallet loads and bulk industrial production scale quantities are shipped from Lab Alley's U.S.-based distribution centers by LTL freight carriers. Request a discounted wholesale price quote, here. Read customer and product reviews, here. Read return and refund policies, here. Lab Alley, founded in 2013, is a reliable Potassium Acid Phthalate, ACS Grade supplier and distributor headquartered near Austin, Texas. Lab Alley was a 2021 Inc. 5000 honoree. Email if you have questions about buying Potassium Acid Phthalate, ACS Grade. 

Download the Potassium Acid Phthalate, ACS Grade MSDS/SDS to get safety tips and health hazard information. Potassium Acid Phthalate, ACS Grade should be carefully handled, stored in a cool dry place and chemical waste should be disposed of properly and safely.

Potassium Acid Phthalate, ACS Grade Retail Prices, Package Sizes And Bulk Quantity Ordering Options: 100g $62, 500g $105, 2.5kg $366, 12kg $1464, 25kg $2343.

Potassium Acid Phthalate, ACS Grade

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