Electronic Grade Anhydrous Sodium Carbonate
Synonymses: Ultra-pure anhydrous sodium carbonate, electronic-grade soda ash, high-purity sodium carbonate
| Item | Details |
| CAS No. | 497-19-8 |
| Molecular Formula | Na2CO3 |
| Molecular Weight | 105.99 |
| Appearance | White to off-white high-purity crystalline powder, free of visible impurities and agglomerated particles |
| Melting Point | 851℃ |
| Boiling Point | 1600℃ (decomposes at high temperature) |
| Density | 2.53 g/cm3 (25℃) |
| Solubility | Highly soluble in water, aqueous solution strongly alkaline; insoluble in organic solvents such as ethanol and acetone |
| Stability | Stable under normal temperature and pressure; reacts violently with acids to release carbon dioxide; easily absorbs moisture and carbon dioxide from air to generate sodium bicarbonate; store isolated from air |
| Core Electronic Grade Specifications | Purity ≥99.9%, total heavy metal impurities (Fe, Pb, Cu, Ni, Zn, Cr etc.) ≤10ppm, single metal ion ≤1ppm, particle size ≤0.5μm, low chlorine and free alkali content |
| HS Code | 2836200000 (Sodium carbonate (soda ash)) |
| Packing | Double-layer dust-free PE vacuum bag (inner layer anti-static) + clean aluminum foil bag / food-grade fiber drum; mainstream specifications: 1kg/5kg/25kg; filled with nitrogen inside packaging; outer package marked with special labels for dust-proof, moisture-proof and anti-pollution; ordinary industrial packaging is prohibited |
| Storage Conditions | Hermetically stored in Class 100 / Class 1000 dust-free workshop, ambient temperature 25±5℃, relative humidity ≤60% RH; isolate air, carbon dioxide and acidic gas; do not mix with other industrial chemicals; open only in dust-free environment; seal remaining materials with nitrogen after opening to prevent moisture absorption and impurity contamination |
| Personal Protection | Special dust-free clean suit for dust-free workshop, nitrile dust-free gloves, goggles and dust mask; avoid direct skin contact and dust inhalation; keep operation area ventilated and dust-free, do not unpack in non-dust-free areas |
| Waste Disposal | Dispose in accordance with electronic-grade hazardous waste regulations; do not discharge directly into sewers or natural water bodies; neutralize waste liquid before compliant discharge; recycle waste packaging uniformly as dust-free waste |
| Application Fields | Primary core application: semiconductor wafer manufacturing; flat panel display (LCD/OLED) industry; photovoltaic silicon wafer processing; synthetic raw material for electronic-grade chemicals; semiconductor packaging and PCB manufacturing; ultra-pure water treatment and analytical testing; other electronic sectors |
