焦亚硫酸钾

焦亚硫酸钾用途

用途一:用作食品漂白剂、保存剂和抗氧化剂。
用途二:该产品是我国允许使用的还原性漂白剂。对食品有漂白作用和对植物性食品内的氧化酶有强烈的抑制作用和更强烈的还原性。我国规定可用于蜜饯、饼干、糖果、葡萄糖、冰糖、竹笋、蘑菇和蘑菇罐头等，最大使用量0.45g/kg；也可用于啤酒，最大使用量0.01g/kg。竹笋、蘑菇、蘑菇罐头、蜜饯、葡萄和黑加仑浓缩汁的残留量(以s02计)小于O．05g／k；食糖、饼干、粉丝及其他品种的残留量小于0.1g／kg；液体葡萄糖的残留量不得超过0.2g/kg。
用途三:用作色谱分析试剂、显影剂、还原剂和细菌抑制剂

焦亚硫酸钾名称

[ CAS 号 ]:
16731-55-8

[ 中文名 ]:
偏硫代硫酸钾

[ 英文名 ]:
potassium metabisulfite

[中文别名 ]:

[英文别名 ]:

POTASSIUM M-BISULFITE
Potassium Metabisulfite
POTASSIUM DISULFITE
potassium pyrosuifite
dipotassiumdisulfite
POTASSIUM BISULFITE
EINECS 240-795-3
POTASSIUMPYROSULPHITE
Dikaliumdisulfit
MFCD00167605

焦亚硫酸钾物理化学性质

[ 密度 ]:
2.34 g/cm3

[ 熔点 ]:
190ºC

[ 分子式 ]:
K₂O₅S₂

[ 分子量 ]:
222.32400

[ 精确质量 ]:
221.84600

[ PSA ]:
124.92000

[ LogP ]:
0.27220

[ 外观性状 ]:
略黄色结晶粉末

[ 储存条件 ]:
Store at +5°C to +30°C.

[ 水溶解性 ]:
H2O: 0.1 M at 20 °C, clear, colorless

焦亚硫酸钾MSDS

详细MSDS(安全技术说明书)

焦亚硫酸钾毒性和生态

CHEMICAL IDENTIFICATION

RTECS NUMBER :: TT4920000

CHEMICAL NAME :: Potassium pyrosulfite

CAS REGISTRY NUMBER :: 16731-55-8

LAST UPDATED :: 199701

DATA ITEMS CITED :: 9

MOLECULAR FORMULA :: O5-S2.K2

MOLECULAR WEIGHT :: 222.32

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 35 gm/kg

SEX/DURATION :: female 49 day(s) pre-mating female 1-21 day(s) after conception

TOXIC EFFECTS :: Reproductive - Effects on Newborn - growth statistics (e.g.%, reduced weight gain)

MUTATION DATA

TEST SYSTEM :: Rodent - rat

DOSE/DURATION :: 400 mg/kg

REFERENCE :: JJCREP Japanese Journal of Cancer Research. (Elsevier Science Pub. BV, POB 211, 1000 AE Amsterdam, Netherlands) V.76- 1985- Volume(issue)/page/year: 80,424,1989 *** REVIEWS *** IARC Cancer Review:Human Inadequate Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) V.1- 1972- Volume(issue)/page/year: 54,131,1992 IARC Cancer Review:Animal Inadequate Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) V.1- 1972- Volume(issue)/page/year: 54,131,1992 IARC Cancer Review:Group 3 IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) V.1- 1972- Volume(issue)/page/year: 54,131,1992 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 82177 No. of Facilities: 1935 (estimated) No. of Industries: 17 No. of Occupations: 13 No. of Employees: 5348 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 82177 No. of Facilities: 4265 (estimated) No. of Industries: 34 No. of Occupations: 45 No. of Employees: 33335 (estimated) No. of Female Employees: 10193 (estimated)

焦亚硫酸钾安全信息

[ 符号 ]:

GHS05

[ 信号词 ]:
Danger

[ 危害声明 ]:
H318

[ 补充危害声明 ]:
Contact with acids liberates toxic gas.

[ 警示性声明 ]:
P280-P305 + P351 + P338

[ 危害码 (欧洲) ]:
Xi

[ 风险声明 (欧洲) ]:
R31

[ 安全声明 (欧洲) ]:
26-36

[ 危险品运输编码 ]:
NONH for all modes of transport

[ WGK德国 ]:
1

[ RTECS号 ]:
TT4920000

[ 海关编码 ]:
2832200000

焦亚硫酸钾制备

1.湿法将硫酸氢钾配制成45 °Bé水溶液加入反应器中，在80℃通入二氧化硫进行反应，使溶液浓度达41～42 °Bé。加入除砷剂和除重金属剂进行溶液净化过滤，将此滤液进行冷却。在20℃以下进行结晶。经离心分离并干燥后，制得食用焦亚硫酸钾成品。

2.将纯净的碳酸钾溶于煮沸的水中，使溶液接近于饱和，趁热过滤。将一末端扩大的导气管插入溶液，并从中通入二氧化硫，反应过程中即有部分结晶析出。当溶液的颜色变为黄绿色，并有强烈的二氧化硫气味时，停止通SO2。并将混合物冷却到22～25℃(不能再低)。抽滤，先用少量饱和了二氧化硫的水，后用乙醇洗涤结晶，最后将结晶夹在滤纸中间在20～25℃下进行干燥。

3.亚硫酸氢钾法　将食用级亚硫酸氢钾加热脱水，制得食用焦亚硫酸钾成品，其反应式如下。

4.用蒸馏水溶解化学纯碳酸钾，使含量约为65%，过滤后加热至90～100℃，真空下将SO2气体通入溶液进行反应，通气管要插到溶液底部：

当溶液变成黄绿色时，停止通入二氧化硫，并将溶液与沉淀混合物冷却至25℃ （不得低于22℃）。待结晶完全后，抽滤，结晶用少量被二氧化硫饱和的水洗涤，再用乙醇洗涤，之后在20～25℃通风处干燥。母液可循环使用。

焦亚硫酸钾海关

[ 海关编码 ]: 2832200000

焦亚硫酸钾文献

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