【CAS】
1310-73-2
【ألياس】
Caustic Soda；Lye；Sodium Hydrate
【الصيغة الجزيئية】
NaOH
【الصيغة الهيكلية】
1 、 1 、 خاصية المنتج
Food-grade sodium hydroxide is a white, odorless, solid (flakes, pellets, or powder) that is highly corrosive and hygroscopic. It dissolves exothermically in water, forming a strong alkaline solution. It reacts with acids, fats, and metals. Used in food processing, it must meet strict purity standards to ensure safety for human consumption.
2、Quality Standards (Food Grade)
| المعلمة | المواصفات |
| المظهر | White flakes/pellets/powder |
| Assay (NaOH) | ≥ 97.0% |
| Carbonate (Na₂CO₃) | ≤ 2.0% |
| كلوريد (Cl-) | ≤ 0.03% |
| المعادن الثقيلة (Pb) | ≤ 5 جزء في المليون |
| الحديد (Fe) | ≤ 10 جزء في المليون |
| مادة غير قابلة للذوبان | ≤ 0.1% |
3 、 نطاق التطبيق والاستخدام
Food-grade sodium hydroxide is widely used in food processing, including peeling fruits/vegetables, neutralizing acids in edible oils, and cleaning food containers. It acts as a pH regulator in beverages and starch modification. In seafood processing, it rehydrates dried products, while in baking, it enhances browning (e.g., pretzels). It also aids in cocoa processing and caramel color production. Strict dosage control is required (typically 0.1–2%) to avoid residual alkalinity. Industrial uses include pharmaceuticals and cosmetics, but food applications require high-purity NaOH with minimal heavy metals
4 、 العبوة والتخزين
Food-grade sodium hydroxide is packed in 25 kg polyethylene-lined woven bags or HDPE drums to prevent moisture absorption. Small quantities use sealed plastic bottles. Storage must be in a cool, dry, ventilated area (<25°C), away from acids and metals. Containers should be airtight to avoid CO₂ absorption, which forms sodium carbonate. Shelf life is 2 years if stored properly. Transport requires corrosion-resistant packaging with “Corrosive” labels. Spills should be neutralized with weak acids (e.g., vinegar). Workers must wear gloves and goggles due to its severe corrosivity
