OXALIC ACIDCAS68603-87-2
specification
ITEM |
SPECIFICATIONS |
Appearance |
White transparent liquid |
Melting point |
189.5 °C (dec.)(lit.) |
Boiling point |
337.5℃[at 101 325 Pa] |
density |
0.99 g/mL at 25 °C |
Vapor density |
4.4 (vs air) |
Vapor pressure |
<0.01mmHg(20℃) |
Acidity coefficient (pKa) |
4.43[at 20 ℃] |
Water solubility |
100g/L at 25℃ |
Exposure limit |
ACGIH: TWA 1 mg/m3; STEL 2 mg/m3 |
LogP |
0.162 at 25℃ |
CONCLUSION |
THE RESULTS CONFORMS WITH ENTERPRISE STANDARDS |
Usage
The oxalic acid standard solution is an oxalic acid solution with a known accurate concentration and is widely used in fields such as chemical analysis, industrial production, and scientific research. The main application methods are as follows:
Chemical Analysis and Determination
- Acid - Base Titration: Oxalic acid is a dibasic weak acid that can undergo a neutralization reaction with bases. It can be used as a standard acid solution to determine the concentration of an unknown - concentration alkaline solution. For example, when titrating a sodium hydroxide solution with an oxalic acid standard solution, using phenolphthalein as an indicator, the accurate concentration of the sodium hydroxide solution can be calculated based on the stoichiometric relationship and the amount of the oxalic acid standard solution used at the end - point of the titration.
- Redox Titration: The carbon element in oxalic acid has a valence of +3, showing reducibility and being able to react with strong oxidizing substances in a redox reaction. In an acidic medium, sodium oxalate can be oxidized by potassium permanganate. Using this reaction, the oxalic acid standard solution can be used to standardize the accurate concentration of the potassium permanganate solution.
Industrial Quality Control
- Metal Surface Treatment: In the surface treatment processes of metals such as aluminum, oxalic acid solutions can be used for etching and cleaning. By using the oxalic acid standard solution, the solution concentration can be precisely controlled to ensure the consistency and stability of the metal surface treatment effect, thus improving product quality. For instance, by controlling the concentration of the oxalic acid standard solution within a specific range, an aluminum product can be etched to obtain a uniform and beautiful surface texture.
- Electroplating Industry: The oxalic acid standard solution can be used to adjust the acidity and composition of the electroplating solution, ensuring the quality and performance of the electroplated layer. Accurately controlling the oxalic acid concentration helps to improve the adhesion, gloss, and corrosion resistance of the electroplated layer, ensuring that the electroplated products meet the quality standards.
Packaging and Shipping
25KG/Drum or as customer requirements.
Shipping: 6 types of dangerous goods and can deliver by ocean.
Keep and storage
Shelf life:24 month from date of manufacture in original unopened packaging stored in a cool dry place out of direct sunlight, water.
Ventilated warehouse, Low temperature drying, Separated from oxidants, acids.