1、 Physicochemical properties

一般为无色或淡黄色或黄绿色液体，具有刺激气味，不稳定，易分解，有腐蚀性。固态次氯酸钠为白色粉末，受热后迅速分解。在空气中极不稳定，在碱性状态时较稳定。易溶于水生成烧碱和次氯酸，次氯酸再分解生成氯化氢和新生氧。具有强氧化性。

Generally, it is colorless or light yellow or yellow green liquid, with pungent smell, unstable, easy to decompose and corrosive. Solid sodium hypochlorite is a white powder, which decomposes rapidly after heating. It is very unstable in air and stable in alkaline state. It is easy to dissolve in water to form caustic soda and hypochlorous acid, which is then decomposed into hydrogen chloride and new oxygen. It has strong oxidation property.

二、危险性

2、 Risk

⒈该物质受热时或与酸接触或在光照下会分解，生成含氯气的油污和腐蚀性气体。浓度大于10%时是一种强氧化剂，与可燃物和还原性物质猛烈反应，有着火或爆炸危险。水溶液浓度较高时也是一种强碱，与酸猛烈反应，并有腐蚀性，侵蚀许多金属。不可燃，在火焰中释放出刺激性或有毒烟雾或气体

1. When heated or in contact with acid or under light, the substance will decompose to produce oil and corrosive gases containing chlorine. When the concentration is more than 10%, it is a strong oxidant. It reacts violently with combustibles and reductive substances, which may cause fire or explosion. When the concentration of the aqueous solution is high, it is also a strong base, which reacts violently with acid, and is corrosive and erodes many metals. It is not flammable and emits irritating or toxic smoke or gas in the flame

⒉经口LD508500mg/kg（小鼠）。次氯酸钠稀溶液对皮肤、眼睛、呼吸道有刺激性，引起皮疹、流泪、视力模糊、咳嗽。食入后引起刺激和腐蚀粘膜的表面，呕吐和腹部疼痛。经常用手接触本品的工人，手掌大量出汗，指甲变薄，毛发脱落。本品放出的游离氯有可能引起中毒。接触高浓度次氯酸钠会引起皮肤灼伤或溃烂，眼睛腐蚀伴有角膜或结膜溃烂，及失明。吸入浓的烟雾会严重刺激肺部，伴有咳嗽或窒息，肺水肿，严重时可致死亡。

2. Oral ld50850mg / kg (mice). Dilute sodium hypochlorite solution has irritation to skin, eyes and respiratory tract, causing rash, tears, blurred vision and cough. Ingestion causes irritation and erosion of the mucosal surface, vomiting and abdominal pain. Workers who often touch this product with their hands have a lot of sweating on their palms, thinning their nails and shedding their hair. The free chlorine released by this product may cause poisoning. Exposure to high concentrations of sodium hypochlorite can cause skin burns or ulcers, eye corrosion, corneal or conjunctival ulceration, and blindness. Inhalation of thick smoke will seriously stimulate the lungs, accompanied by cough or asphyxia, pulmonary edema, serious death.