一、產(chǎn)品名稱
商品名稱：焦亞硫酸鈉 ( 食品添加劑 )
化學名稱：焦亞硫酸鈉：又稱二硫無氧酸鈉
英文名稱： Sodi uM Pgr OsuLne
分子式： Na2S2O5
分子量： 190.12
二、產(chǎn)品的理化性質(zhì)
成品呈白色或微黃色結晶粉末。濕時帶有強烈的SO2氣味、干燥后無其它氣味，比重1.4 、溶于水和甘油、溶解度隨溫度升高而增大，產(chǎn)品微溶干醇。
三、用途：
焦亞硫酸鈉廣泛用于制革、織物及有機物的漂白、印染的媒染劑、食品保存、釀造和飲料的殺菌防腐劑。有機合成 ( 制造乙內(nèi)酰胺 ) 照橡用還原劑、橡膠凝固劑及香料等
四、質(zhì)量標準
本產(chǎn)品質(zhì)量標準按 GB1893 — 1998 之規(guī)定執(zhí)行
1 、外觀：焦亞硫酸鈉一級品為白色顆粒狀粉末。
2 、食品添加劑焦亞硫酸鈉應符合下列要求：
|
指標名稱 |
指標 |
|
主含量（以 Na 2 S 2 O 5 計），%≥ |
95.0 |
|
鐵含量 ( 以 Fe 計 ), %≤ |
0.005 |
|
澄清度 |
稍有微濁 |
|
重金屬含量 ( 以 pb 計 ) ，%≤ |
0.001 |
|
砷含量 ( 以 AS 計 ) ，%≤ |
0.0002 |
五、注意事項：
產(chǎn)品露置空氣中極易被氧化、并不斷放出二氧化硫氣體最后使產(chǎn)品變成硫酸鈉，故本產(chǎn)品不易久存、不易露天存放、不可受潮，本產(chǎn)品加溫到高于 150 度則分解放出二氧化硫氣體，故不可與汽油酸類及氧化劑等其它易燃品混存和混運，本產(chǎn)品包裝為內(nèi)襯塑料袋、外加一層編織袋，每袋凈重 50 公斤，出口每袋凈重 25 公斤 。
A 、NAME OF PRODUCT ：
Commodity Name ： Sodium pyrosulfite
(Food additive)
Chemical Name ： Sodium pyrosulfite
Also called ： Bi-sodium sulfate free from oxygen
English Name ： Sodium pyrosulfite
Molecular formula ： Na2S2O5
Moldcular Weight ： 190.12
B 、PHYSLCAL AND CHEMICAL PROPERTIES OF PRODUCT
The product exists in form of white powder of monoclinic crystals with strong SO 2 smell when being wet , but without any other smell after it is dried .Its relative density is 1.40. It is easy soluble in water and little soluble in ethanol . It disintegrates easily when being heated.
C 、APPLICATIONS
Soudium pyrosulfite is widely used in taning, fabrics and bleaching organics , as dye mordant in printing and dyeing, for preserving foods, brewery, sterilization and rot-proof agent, It is also used in organic composition (manufacture of hydantoinate) and photography （ as reducing agent ） .It can be used as rubber coagulator and spice.
D 、QUALITY STANDARD ： (In accordance with GB 1893-1998)
1 、Appearance ： Sodium pyrosulfite sulfite grade one is white crystal powder.
2 、Food additive Sodium pyrosulfite shall meet the following requirements:
|
Name of parameter |
Parameter |
|
Main content (Na 2 S 2 O 5 ) ，% ≥ |
95.0 |
|
Content of iron (Fe), % ≤ |
0.005 |
|
Clarity |
A little turbid |
|
Content of heavy metal (in pb) ，% ≤ |
0.001 |
|
Content of arsenic (As) ，% ≤ |
0.0002 |
E 、CAUTION
The product is very easy to be oxidized when exposed to air and emit sulfur dioxide continuously, so it is difficult to store the product for a long time in open air and it is necessary to protect the product form moisture. The product will disintegrate when heated above 150 ℃ and emit sulfur dioxide gas, so the product cannot be stored and transported together with gasoline, acids or oxidants and other inflammable substances. The product is packed in internal plastic bags with external braided bags in net weight of 50kg . Product for export is packed in net weight of 25kg .
