Potassium Tetroxalate Dihydrate (CAS 6100-20-5) Product Brief

1. Product Overview

Potassium Tetroxalate Dihydrate, also known as Potassium Trihydrogen Dioxalate Dihydrate, commonly named Tetroxalate of Potassium. It is an organic oxalate crystalline compound with stable buffer property and mild metal cleaning capacity. Widely adopted as analytical pH reference reagent, metal rust remover, polishing agent and photographic auxiliary chemical.

2. Basic Chemical Information

Product Name: Potassium Tetroxalate Dihydrate

Aliases: Potassium trihydrogen dioxalate dihydrate

CAS No.: 6100-20-5

EINECS No.: 204-874-6

Molecular Formula: KH3.(C2O4)2.2(H2O)

Molecular Weight: 254.19

Odor: Odorless

Solubility: Soluble in water; slightly soluble in ethanol

pH (saturated aqueous solution): Standard pH buffer reference

3. Core Product Features

- Possesses stable buffering performance, classic primary pH standard substance for laboratory calibration

- Effective complexing and cleaning ability for metal oxides, suitable for rust stain removal and surface polishing

- Uniform crystal form, low impurity, stable batch quality for analytical grade demand

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

4. Main Applications

Laboratory Analysis: pH reference buffer reagent, used for pH meter calibration, analytical titration

Metal Treatment: Rust remover, cleaning agent for iron oxide, polishing auxiliary for metal parts

Photography Industry: Auxiliary chemical for film developing and washing process

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 lined with PE inner bag; small lab packages available.

Storage: Store in dry, cool and ventilated warehouse, keep tightly sealed to prevent moisture absorption. Avoid contact with alkaline substances.

Shelf Life: 24 months under proper storage.7. Transportation & SafetyHazard classification: Harmful substance (oral & dermal contact). UN 3261, Class 8, Packing Group III.