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    depot medroxyprogesterone acetate

    Browse the articles related depot medroxyprogesterone acetate. The large information of depot medroxyprogesterone acetate is complemented and updated on echemi.com.
    • The domestic ethyl acetate market is firm on January 28

      Time of Update: 2021-11-27
      On January 28, the domestic ethyl acetate market was strong. Ethyl acetate has good cost support.
    • Glacial acetic acid for industrial use (Appendix A, Appendix B, Appendix C)

      Time of Update: 2021-11-24
      1 Comparison table of relationship between crystallization point and content of glacial acetic acid Appendix C(Normative appendix)Determination of relative mass correction factorC.
    • Glacial acetic acid for industrial use (3)

      Time of Update: 2021-11-24
      , and the remaining potassium bromide-potassium bromate is measured by iodometry . >The content of formic acid is obtained from the difference between the measured values ​​of the two steps
    • Glacial acetic acid for industrial use (6)

      Time of Update: 2021-11-24
      Hydrochloric acid solution: 1+1, take premium grade pure hydrochloric acid for preparation;>4. 10. 2. 2
    • Glacial acetic acid for industrial use (7)

      Time of Update: 2021-11-24
      1 Method summaryUnder specified conditions, add potassium permanganate solution to the sample to be tested, compare it with the standard colorimetric solution, and observe the time required for the test solution to fade .
    • N-Butyl acetate for industrial use (1)

      Time of Update: 2021-11-23
      3. 2 Industrial n-butyl acetate should meet the technical requirements shown in Table 1 .
    • N-Butyl Acetate for Industrial Use (3)

      Time of Update: 2021-11-23
      1 LogoThe packaging container for industrial n-butyl acetate products should have a firm logo, which includes the name of the manufacturer, product name and the number of this standard.
    • Glacial acetic acid for industrial use (4)

      Time of Update: 2021-11-23
      1. 5 Result calculationThe mass fraction w 2 of formic acid , the value is expressed in %, calculated according to formula (2): Where:V 0 —The value of the volume of sodium thiosulfate standard titration solution (4.
    • Glacial acetic acid for industrial use (1)

      Time of Update: 2021-11-23
      1 ScopeThis standard specifies the technical requirements, test methods, inspection rules and signs, packaging, transportation, storage and safety of industrial glacial acetic acid .
    • Ethyl acetate for industrial use (1)

      Time of Update: 2021-11-23
      1 ScopeThis standard specifies the industrial ethyl technical requirements, test methods, inspection rules and signs, packaging, transportation, storage and safety, this standard applies to industrial ethyl acetate production, testing and marketing .
    • Glacial acetic acid for industrial use (2)

      Time of Update: 2021-11-23
      2. 4 Result calculationThe mass fraction w 1 of acetic acid , the value is expressed in %, calculated according to formula (1): Where:V—The value of the volume of sodium hydroxide standard titration solution (4.
    • Ethyl acetate for industrial use (2)

      Time of Update: 2021-11-23
      is not more than 25% of the arithmetic mean of the two determination values . >The industrial ethyl acetate prepared
    • Industrial n-Butyl Acetate (2)

      Time of Update: 2021-11-23
      Using capillary column gas chromatography as the arbitration method, take the arithmetic average of the two parallel determination results as the determination result, and the absolute difference between the two parallel determination results shall not exceed 0.
    • Glacial acetic acid for industrial use (8)

      Time of Update: 2021-11-23
      >>The packaging container of industrial glacial acetic acid products should have a clear mark indicating the product name, manufacturer name, site, trademark, batch number or production date, quality grade, net content, number
    • Glacial acetic acid for industrial use (5)

      Time of Update: 2021-11-23
      4 Result calculationThe mass fraction of acetaldehyde w 4 , the value is expressed in %, calculated according to formula (4): Where:V 0 —The value of the volume of the sodium thiosulfate standard titration solution (4.
    • Industrial Acetic Anhydride (Appendix A)

      Time of Update: 2021-11-17
      >Platinum-cobalt standard colorimetric solution: prepared according to GB/T3143 . >Prepare standard colorimetric fluids with no less than 10 color numbers in the range
    • Industrial Acetic Anhydride (Appendix C)

      Time of Update: 2021-11-17
      method summary>After the sample is evaporated, it is prepared into a solution of appropriate concentration, sprayed in an air-acetylene flame, with an iron hollow cathode lamp as the light source, and the absorbance
    • Industrial Acetic Anhydride (3)

      Time of Update: 2021-11-17
      5. 6 Sampling of industrial acetic anhydride shall be carried out in accordance with the provisions of GB/T6678 and GB/T6680 .
    • Industrial Acetic Anhydride (2)

      Time of Update: 2021-11-17
      5mL phenolphthalein indicator solution, and titrate the excess sodium hydroxide with a standard titration bath of hydrochloric acid until the pink color just disappears .
    • Industrial Acetic Anhydride (1)

      Time of Update: 2021-11-17
      3. 2 The quality of industrial acetic anhydride should meet the requirements of Table 1 .

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