Sodium nitrite

Classification：Sodium nitrite
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Release date：2020-07-22 16:11:42

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Chinese name： Industrial Sodium Nitrite (NaNO2)

English name：Sodium nitrite

CAS NO：7632-00-0

EC NO：231-555-9

UN：1500

Molecular formula： NaNO2

Molecular weight：68.99

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White or a little buff fine crystal. The relative molecular weight is 69.0 and density is 2.168. It is unscented with a little saline taste, easy to be deliquescenced and to dissolve in water. The melting point is 271 land decomposition temperature is 320笆.It has property ofoxidability and reducibility. It can be slowly oxidized into sodium nitrite in the air, and become diamino compound composed with ammonia under low temperature.

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It is mainly used as the production raw material of nitro-compound and azo dyes, etc. It is also used as mordant and bleacher for fabric dyeing, as well as metal heat treatment agent, early-strength admixture and antifreeze of cement.

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(1)This product shall be stored in the place of ventilation and dry, avoiding dampened, heated and exposure under sunlight.

(2)This product shall not be delivered or stored together with strong reducing agent, inflammable and detonatable substances, foods, feed, and additives.

(3)This product is venomous. Please keep it safely. Don' t eat it by mistake.

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GB/2367-2006

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ITEM	Index value
ITEM	Best quality	First quality	Qualified quality	Result
Content of sodium nitrite （calculated by dry base) %	≥99.0	≥98.5	≥98.0	98.5
Content of sodium nitrate （calculated by dry base) %	≤0.8	≤1.0	≤1.5	0.8
Content of chloride(NaCl) （calculated by dry base) %	≤0.10	≤0.17	—	0.10
Content of insolubles in water（calculated by dry base) %	≤0.05	≤0.06	≤.10	0.017
Moisture %	≤1.4	≤2.0	≤2.5	1.1
Apperance of product	White fine crystal
Package and Trade mark	By woven plastic bag out , and white plastic bag inner
Result	First quality
Remark

物(wù)理(lǐ)性質(zhì)

白色至淺黃色粒狀、棒狀或粉末。有(yǒu)吸濕性。溶于1.5份冷水、0.6份沸水，微溶于乙醇。相對密度2.17。熔點271℃。

化學(xué)性質(zhì)

其水溶液呈堿性，屬強氧化劑又(yòu)有(yǒu)還原性，

在空氣中(zhōng)會逐漸氧化，表面則變為(wèi)硝酸鈉，加熱至320℃以上分(fēn)解，也能(néng)被氧化劑所氧化；遇弱酸分(fēn)解放出棕色二氧化氮氣體(tǐ)；與有(yǒu)機物(wù)、還原劑接觸能(néng)引起爆炸或燃燒，并放出有(yǒu)毒的刺激性的氧化氮氣體(tǐ)；遇強氧化劑也能(néng)被氧化，特别是铵鹽，如與硝酸铵、過硫酸铵等在常溫下，即能(néng)互相作(zuò)用(yòng)産(chǎn)生高熱，引起可(kě)燃物(wù)燃燒。有(yǒu)氧化性，與有(yǒu)機物(wù)接觸能(néng)燃燒和爆炸，并放出有(yǒu)毒和刺激性的過氧化氮和氧化氮的氣體(tǐ)。

亞硝酸鈉有(yǒu)毒，半數緻死量(大鼠，經口)180mg/kg [1] ，有(yǒu)傳言說亞硝酸鈉是緻癌物(wù)質(zhì)，但事實上亞硝酸鈉并不是緻癌物(wù)質(zhì)，緻癌的是亞硝酸鈉在一定條件下生成的亞硝胺，在亞硝酸鈉分(fēn)子中(zhōng)，氮的化合價是+3。是一種中(zhōng)間化合态，既有(yǒu)還原性又(yòu)有(yǒu)氧化性，例如在酸性溶液中(zhōng)能(néng)将KI氧化成單質(zhì)碘。

項目名(míng)稱	單位	一等品	合格品
亞硝酸鈉	%≥	98.5	98.00
硝酸鈉	%≤	1.00	1.90
氯化物(wù)	%≤	0.17	—
水不溶物(wù)	%≤	0.06	0.10
水份	%≤	2.00	2.50
外觀		白色或無色透明晶體(tǐ)