Potassium Binoxalate (CAS 127-95-7) Product Brief

1. Product Overview

Potassium Binoxalate, also named Potassium Hydrogen Oxalate / Potassium Acid Oxalate, is an acidic monopotassium salt of oxalic acid. It possesses weak acidity and excellent metal oxide chelating capacity. Widely used as analytical standard reagent, metal rust remover, polishing agent, textile mordant and cleaning raw material.

Important Distinction:

- Potassium Binoxalate (KHC₂O₄, CAS 127-95-7)

- Do NOT mix up with Potassium Tetroxalate Dihydrate KH₃(C₂O₄)₂·2H₂O (CAS 6100-20-5) 

2. Basic Chemical Information

Product Name: Potassium Binoxalate

Aliases: Potassium Hydrogen Oxalate, Potassium Acid Oxalate, Salt of Sorrel

CAS No.: 127-95-7

EINECS No.: 204-873-0

Molecular Formula: KHC2O4 .H2O

Molecular Weight: 128.13

Appearance: Colourless monoclinic crystals or white crystalline powder

Odor: Odorless

Solubility: Soluble in water; slightly soluble in ethanol

pH (0.1M aqueous solution): approx. 2.7

Stability: Decomposes above 200°C without melting

3. Core Product Features

- Moderate acidity, effective chelation for iron oxides, good rust-cleaning performance

- Used as primary standard substance for volumetric titration in chemical analysis

- Uniform crystal form, stable batch quality for industrial & analytical grades

- Easy dissolution in water, convenient to prepare aqueous working solution

4. Main Applications

Laboratory Analysis: Primary standard reagent for redox titration and acid-base calibration

Metal Treatment: Rust remover, surface polishing auxiliary for iron, steel and alloy parts

Textile Industry: Mordant for printing & dyeing

Cleaning Field: Ink stain remover, cleaning agent for wood, metal surfaces

Photography Industry: Auxiliary chemical for film processing

5. Typical Specifications

Assay: ≥99.0%

Water Insoluble Matter: ≤0.01%

Chloride (Cl): ≤0.002%

Sulfate (\(SO_4\)): ≤0.02%

Heavy Metals (Pb): ≤0.002%

6. Packing & Storage

Packing: 25kg woven bag with PE inner liner; small reagent packages available.

Storage: Keep tightly sealed in cool, dry and ventilated warehouse. Avoid alkaline materials and strong oxidants.

Shelf Life: 24 months under proper sealed storage.7. Safety & TransportationUN 2811, Class 6.1 Toxic substance, Packing Group III.