-
Categories
-
Pharmaceutical Intermediates
-
Active Pharmaceutical Ingredients
-
Food Additives
- Industrial Coatings
- Agrochemicals
- Dyes and Pigments
- Surfactant
- Flavors and Fragrances
- Chemical Reagents
- Catalyst and Auxiliary
- Natural Products
- Inorganic Chemistry
-
Organic Chemistry
-
Biochemical Engineering
- Analytical Chemistry
-
Cosmetic Ingredient
- Water Treatment Chemical
-
Pharmaceutical Intermediates
Promotion
ECHEMI Mall
Wholesale
Weekly Price
Exhibition
News
-
Trade Service
The quality of 30kg of pharmaceutical grade glycerin meets the Pharmacopoeia standard.
[Check] Take 25.
0g of this product for pH, add water to dilute to 50ml, mix well, add 0.
5ml of phenolphthalein indicator solution, the solution should be colorless, add 0.
2ml of 0.
1mol/L sodium hydroxide solution , the solution should appear pink
.
Color Take 50ml of this product and put it in a 50ml Nessler colorimetric tube.
Compared with the control solution (0.
2ml of potassium dichromate solution for colorimetry, diluted with water to 50ml), it should not be darker
.
Chloride Take 5.
0g 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.
001%)
.
Sulfate Take 10.
0g of this product and inspect it according to the law (General Rule 0802).
Compared with the control solution made of 2.
0ml of standard potassium sulfate solution, it should not be more concentrated (0.
002%)
.
Aldehyde and reducing substances Take 1.
0g of this product, put it in a 50ml measuring bottle, add 25ml of water to dissolve, add 10% hydrazone solution (adjust the pH value to 4.
0 with 0.
02mol/L sodium hydroxide solution
.
Newly prepared for immediate use) 2ml, let stand For 30 minutes, add 5 ml of newly prepared 0.
5% ferric chloride solution, shake well, let stand for 5 minutes, add methanol to dilute to the mark, and shake well
.
According to ultraviolet-visible spectrophotometry (general rule 0401), measure the absorbance at the wavelength of 655nm, the absorbance of the test solution should not be greater than the absorbance of the reference solution [per 1ml containing formaldehyde (CH2O) 5.
0μg] 2.
0ml after the same method.
.
Sugar take 5.
0g of this product, add 5ml of water, mix well, add 1ml of dilute sulfuric acid, heat on a water bath for 5 minutes, add 2mol/L sodium hydroxide solution without carbonate (take an appropriate amount of sodium hydroxide, add water and shake to make Dissolve it into a saturated solution, after cooling, put it in a polyethylene plastic bottle, keep it closed for several days, take 5.
6ml of the supernatant, add freshly boiled cold water to make 50ml, shake well, that is, 3ml, add dropwise sulfuric acid Copper test solution 1ml, mix well, it should be a blue clear solution, continue to heat on the water bath for 5 minutes, the solution should still be blue, no precipitation
.
Fatty acids and lipids Take 40.
0g of this product, add 40ml of freshly boiled and cooled water, then add 10ml of sodium hydroxide titration solution (0.
1mol/L) precisely, shake well, boil for 5 minutes, let cool, add phenolphthalein indicator solution A few drops were titrated with hydrochloric acid titration solution (0.
1mol/L) until the red color disappeared, and the titration result was corrected with a blank test
.
The consumed sodium hydroxide titrant (0.
1mol/L) should not exceed 4.
0ml
.
Take 4.
0g of this product, add 5ml of sulfuric acid dropwise under shaking, and control the temperature not to exceed 20 °C during the process.
The solution is 0.
2ml, and the colorimetric is made with potassium dichromate solution 1.
6ml and water 8.
2ml), and it should not be deeper
.
Chloride Take 5.
0g of this product, add 10ml of water and 1ml of 2mol/L sodium hydroxide solution, mix well, add 50mg of nickel-aluminum alloy, heat on a water bath for 10 minutes, cool to room temperature, filter, and wash with 20ml of water.
container and filter residue, collect the filtrate and washing solution into a 50ml Nessler colorimetric tube, add 0.
5ml of nitric acid, mix well, then add 0.
5ml of silver nitrate test solution, add water to the mark, and shake well
.
Compared with the control solution made of 15ml of standard sodium chloride solution, it should not be deeper (0.
003%)
.
[Check] Take 25.
0g of this product for pH, add water to dilute to 50ml, mix well, add 0.
5ml of phenolphthalein indicator solution, the solution should be colorless, add 0.
2ml of 0.
1mol/L sodium hydroxide solution , the solution should appear pink
.
Color Take 50ml of this product and put it in a 50ml Nessler colorimetric tube.
Compared with the control solution (0.
2ml of potassium dichromate solution for colorimetry, diluted with water to 50ml), it should not be darker
.
Chloride Take 5.
0g 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.
001%)
.
Sulfate Take 10.
0g of this product and inspect it according to the law (General Rule 0802).
Compared with the control solution made of 2.
0ml of standard potassium sulfate solution, it should not be more concentrated (0.
002%)
.
Aldehyde and reducing substances Take 1.
0g of this product, put it in a 50ml measuring bottle, add 25ml of water to dissolve, add 10% hydrazone solution (adjust the pH value to 4.
0 with 0.
02mol/L sodium hydroxide solution
.
Newly prepared for immediate use) 2ml, let stand For 30 minutes, add 5 ml of newly prepared 0.
5% ferric chloride solution, shake well, let stand for 5 minutes, add methanol to dilute to the mark, and shake well
.
According to ultraviolet-visible spectrophotometry (general rule 0401), measure the absorbance at the wavelength of 655nm, the absorbance of the test solution should not be greater than the absorbance of the reference solution [per 1ml containing formaldehyde (CH2O) 5.
0μg] 2.
0ml after the same method.
.
Sugar take 5.
0g of this product, add 5ml of water, mix well, add 1ml of dilute sulfuric acid, heat on a water bath for 5 minutes, add 2mol/L sodium hydroxide solution without carbonate (take an appropriate amount of sodium hydroxide, add water and shake to make Dissolve it into a saturated solution, after cooling, put it in a polyethylene plastic bottle, keep it closed for several days, take 5.
6ml of the supernatant, add freshly boiled cold water to make 50ml, shake well, that is, 3ml, add dropwise sulfuric acid Copper test solution 1ml, mix well, it should be a blue clear solution, continue to heat on the water bath for 5 minutes, the solution should still be blue, no precipitation
.
Fatty acids and lipids Take 40.
0g of this product, add 40ml of freshly boiled and cooled water, then add 10ml of sodium hydroxide titration solution (0.
1mol/L) precisely, shake well, boil for 5 minutes, let cool, add phenolphthalein indicator solution A few drops were titrated with hydrochloric acid titration solution (0.
1mol/L) until the red color disappeared, and the titration result was corrected with a blank test
.
The consumed sodium hydroxide titrant (0.
1mol/L) should not exceed 4.
0ml
.
Take 4.
0g of this product, add 5ml of sulfuric acid dropwise under shaking, and control the temperature not to exceed 20 °C during the process.
The solution is 0.
2ml, and the colorimetric is made with potassium dichromate solution 1.
6ml and water 8.
2ml), and it should not be deeper
.
Chloride Take 5.
0g of this product, add 10ml of water and 1ml of 2mol/L sodium hydroxide solution, mix well, add 50mg of nickel-aluminum alloy, heat on a water bath for 10 minutes, cool to room temperature, filter, and wash with 20ml of water.
container and filter residue, collect the filtrate and washing solution into a 50ml Nessler colorimetric tube, add 0.
5ml of nitric acid, mix well, then add 0.
5ml of silver nitrate test solution, add water to the mark, and shake well
.
Compared with the control solution made of 15ml of standard sodium chloride solution, it should not be deeper (0.
003%)
.
