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Pharmaceutical grade sodium metabisulfite content 95 or more crystalline powder sodium metabisulfite JiaoyaliusuannaSodium Metabisulfite Na2S2O5 190.
10 [7681-57-4] This product contains not less than 95.
0% Na2S2O5
.
【Properties】This product is colorless to off-white crystal or crystalline powder
.
This product is easily soluble in water and very slightly soluble in ethanol
.
[Identification] (1) Take the iodine test solution, drop an appropriate amount of the aqueous solution (1→20) of this product, and the color of iodine will disappear; the obtained solution shows the reaction of sulfate identification (1) and (3) (general rule 0301)
.
(2) This product shows the flame reaction of sodium salt (general rule 0301)
.
【Check】Acidity Take 1.
0g of this product, dissolve it in 20ml of water, and measure it according to the law (General Rule 0631).
The pH value should be 3.
5 to 5.
0
.
Clarity and color of the solution Take 1.
0g of this product, dissolve it in 10ml of water, and check it according to the law (general rules 0901 and 0902).
The solution should be clear and colorless
.
Chloride Take 0.
10g of this product and inspect it according to the law (General Rule 0801).
Compared with the control solution made of 5.
0ml of standard sodium chloride solution, it should not be more concentrated (0.
05%)
.
Physical and chemical properties of sodium metabisulfite: The product is white or yellowish crystalline powder, with strong SO2 odor when wet, no other odor after drying, specific gravity 1.
4 soluble in water glycerin, solubility increases with temperature increase, product slightly soluble alcohol
.
Sodium metabisulfite uses: sodium metabisulfite is used for bleaching of leather, fabric and organic matter, mordant for printing and dyeing, food preservation, brewing and beverage bactericidal preservatives, organic synthesis (manufacturing hydantoin) photographic reducing agent, rubber coagulant and Spices
etc.
Sodium metabisulfite is white or yellow crystalline powder or small crystal, with strong SO2 odor, specific gravity 1.
4, soluble in water, the aqueous solution is acidic, when contacted with strong acid, SO2 will be released to form corresponding salts, and it will oxidize if left in the air for a long time.
Into Na2S2O6, so the product can not survive for a long time
.
Above 1500C, SO2 is decomposed
.
10 [7681-57-4] This product contains not less than 95.
0% Na2S2O5
.
【Properties】This product is colorless to off-white crystal or crystalline powder
.
This product is easily soluble in water and very slightly soluble in ethanol
.
[Identification] (1) Take the iodine test solution, drop an appropriate amount of the aqueous solution (1→20) of this product, and the color of iodine will disappear; the obtained solution shows the reaction of sulfate identification (1) and (3) (general rule 0301)
.
(2) This product shows the flame reaction of sodium salt (general rule 0301)
.
【Check】Acidity Take 1.
0g of this product, dissolve it in 20ml of water, and measure it according to the law (General Rule 0631).
The pH value should be 3.
5 to 5.
0
.
Clarity and color of the solution Take 1.
0g of this product, dissolve it in 10ml of water, and check it according to the law (general rules 0901 and 0902).
The solution should be clear and colorless
.
Chloride Take 0.
10g of this product and inspect it according to the law (General Rule 0801).
Compared with the control solution made of 5.
0ml of standard sodium chloride solution, it should not be more concentrated (0.
05%)
.
Physical and chemical properties of sodium metabisulfite: The product is white or yellowish crystalline powder, with strong SO2 odor when wet, no other odor after drying, specific gravity 1.
4 soluble in water glycerin, solubility increases with temperature increase, product slightly soluble alcohol
.
Sodium metabisulfite uses: sodium metabisulfite is used for bleaching of leather, fabric and organic matter, mordant for printing and dyeing, food preservation, brewing and beverage bactericidal preservatives, organic synthesis (manufacturing hydantoin) photographic reducing agent, rubber coagulant and Spices
etc.
Sodium metabisulfite is white or yellow crystalline powder or small crystal, with strong SO2 odor, specific gravity 1.
4, soluble in water, the aqueous solution is acidic, when contacted with strong acid, SO2 will be released to form corresponding salts, and it will oxidize if left in the air for a long time.
Into Na2S2O6, so the product can not survive for a long time
.
Above 1500C, SO2 is decomposed
.
