소개
Sodium oxalate is the sodium salt of oxalic acid, appearing as a white crystalline powder. It is a reducing agent and is toxic. It serves as a crucial primary standard substance in analytical chemistry.
Common chemical reactions: oxidized by potassium permanganate (KMnO4) into carbon dioxide and water under acidic conditions (a reaction used to standardize KMnO4 solutions); reacts with calcium ions to form highly insoluble calcium oxalate precipitates.
사양
| 목 | 사양 |
| 모습 | 흰색 결정 분말 |
| 분석 (순도) | ≥ 99.0% |
| 녹는점 | 250 – 270 °C (Decomposes) |
| 휘발성 | 비휘발성 |
| 재 함량 | N/A (Transforms to Na2CO3 upon heating) |
| 용해도 | 3.7 g/100 mL (20°C in water), insoluble in alcohol |
| 열 안정성 | Decomposes above 250°C into sodium carbonate and carbon monoxide |
응용 분야 및 기능
- 분석화학: Primary standard reagent for standardizing potassium permanganate solutions.
- Metallurgy & Tanning: Used in leather tanning processes and as a precipitant to separate noble metals.
- Pyrotechnics: Used to manufacture yellow-flame fireworks.
저장
Store in a cool, dry, and well-ventilated warehouse. Packaging must be tightly sealed and moisture-proof. It should be stored separately from oxidants, acids, and food-grade chemicals. Mixed storage is strictly prohibited.
취급 및 주의사항
This product is toxic. Ingestion or inhalation of dust is harmful (can cause hypocalcemia and kidney damage). Operators must wear dust masks, safety goggles, and rubber gloves. Avoid direct contact with skin and eyes; wash thoroughly after handling.
공식
Metal Rust Remover / Cleaner: Sodium Oxalate (5%) + Surfactant (2%) + Water (93%).
Function: The oxalate ions in sodium oxalate can undergo a complexation reaction with iron rust (iron oxide) on metal surfaces, forming soluble iron oxalate complexes, thereby effectively removing rust and brightening the metal surface.
포장
PE 백으로 안감을 댄 섬유 드럼 또는 골판지 상자에 포장합니다. 맞춤형 포장은 요청 시 가능합니다.
자주 묻는 질문
Is sodium oxalate harmful to the environment?
Large-scale discharge will harm water bodies because it depletes calcium ions and alters pH levels. Waste liquids must be treated with calcium salts to precipitate it before discharge.
Why is heating sodium oxalate dangerous?
When decomposing at high temperatures (above 250°C), sodium oxalate releases highly toxic and flammable carbon monoxide (CO) gas. Therefore, heating operations must be conducted in a fume hood.
옥살산나트륨과 옥살산의 차이점은 무엇인가요?
옥살산은 강산성 물질이며, 옥살산나트륨은 옥살산의 염으로, 그 수용액은 약알칼리성입니다. 둘 다 옥살산 이온을 포함하고 있지만, 부식성과 물리적 형태에서 상당한 차이가 있습니다.