Sodium metabisulfite

• Post Date:

  May 05,2017

• Expiry Date:

  Nov 01,2017

• Detailed Description:

  Cas No. :7681-57-4

  Property: white or light yellow crystal powder, a strong smell of sulfur dioxide,relative density is 1.4,

  easy to dissolve in water and glycerin, water solution. It has acidity,and its solubility will become large

  while raising the temperature and is less to dissolve in ethanol.
  Molecular Formula :Na2S2O5
  Molecule Weight :190.12
  CAS NO .:7681-57-4
  Appearance :White Free Flowing Fine Crystal or Powder
  Packing:Packed in 25kg plastic woven bag, 25kg Kraft paper bag, 25kg PE bag,
  500kg/1000kg/1100kg/1200kg jumbo bag or as per the buyer's requirement.
  Specification For Food Grade and Industry Grade :

  Item                                                             Quality Index
                                                      Food Grade         Industry Grade
  Purity ( As Na2S2O5)             98.0% min            96.0% min
  Sulfur Dioxide( SO2)              65.0% min             65.0% min
  Arsenic ( As )                            0.0002% max -
  Heavy metals ( As Pb )           0.0005% max -
  Selenium (Se )                        0.0005% max -
  Iron (Fe)                                    0.001% max         0.002% max
  Water insoluble                       0.02% max          0.05% max
  PH value :                                  4.0-4.8             4.0-4.8
  Remark :                     Conformed with FCC V and E 223 Standard
  Specification for Pharmaceutical Grade and Photo Grade
  Item                                                     Quality Index
                                              Pharmaceutical Grade      Photo Grade
  Purity ( As Na2S2O5)            98.0% min                 98.0% min
  Sulfur Dioxide( SO2)              65.0% min                65.0% min
  Thiosulphate ( As                  0.05 % max                0.05% max
  S2O3) :
  
  Chloride ( As CL-) :               30 ppm max           50ppm max
  Arsenic ( As ) :                         1ppm max           1ppm max
  Lead ( Pb ) :                             1 ppm max           2ppm max
  Copper (Cu) :                          1 ppm max           1ppm max
  Iron (Fe ) :                                5 ppm max           5ppm max
  Mercury (Hg) :                          0.1ppm max           1ppm max
  Chromium (Cr) :                     1 ppm max -
  Selenium (Se ) :                     1 ppm max           5ppm max
  Zinc (Zn)                                  1 ppm max           1ppm max
  Cadmium (Cd )                      1ppm max -
  Nickel (Ni)                               1ppm max -
  Na2SO3 + Na2SO4                 1.5% max -
  PH value :                                    4.0-4.8           4.0-4.8
  Remark : Conformed with USP standard
  Application:
  (1) Food Grade: Bleach agent (e.g. candies, cake, bamboo shoots, etc); Loose agent (e.g.
  bread, cracker etc); Antiseptic and germicide (e.g. fruit juice, tinned food, brews, the
  cereals food is defended storage etc); Inhibitor and freshen agent (e.g. day lily, seafood,
  fruit and vegetable etc).
  (2) Industry Grade: Mordant of printing and dyeing; Dechlorinate of textile after bleaching;
  Sulphonated agent and reducer of chemical industry and pharmacy; Bleach of paper pulp,
  bamboo and timber bleach of Stap; Treatment agent of waste water; Rubber solidifying
  agent Perfume industry is served as hydro carbon perfume aldehyde
  The hide profession employ to do to molt dose and pliable dose and wearproof dose;
  sewage treatment, and so on .
  (3) Pharmaceutical Grade: In chemical synthesis in the production of acrylic fibre, vitamin
  K, vitamin A, pharmaceutical intermediates, etc.
  (4) Photo Grade: The sensitize industry is served as the developing agent reductant and
  the protection of fixing bath dose.
  Storage:Store the product in a dry and cool place.

  Application:

  

• CAS Registry Number:

  7681-57-4

• Synonyms:

  ;Sodium pyrosulfite;disodium disulphite;Sodium metabisulphite;Sodium disulphite;Sodium pyrosulphite;SODIUM DISULFITE;disodium oxidosulfanesulfonate oxide;Sodium Metabi;Metabisulfite Sodium;Sodium Metabisulfite (Food Grade);

• Molecular Formula:

  Na₂S₂O₅

• Molecular Weight:

  190.1065

• Molecular Structure:

  

• Hazard Symbols:

   Xn:Harmful;
  

• Risk Codes:

  R22:;
  R31:;
  R41:;
  

• Safety Description:

  S26:;
  S39:;
  S46:;
  

• Company:

  Shouguang Bule Ribbon Chemical Co., Ltd     [ China ]        

• Contact:

  18053640999

• Tel:

  0536-8061689 18053640999

• Fax:

  0536-8061689

• Email:

  sales@lanbangchem.com