Reference number
ISO 2993:1974
International Standard
ISO 2993:1974
Ammonium sulphate for industrial use — Determination of free acidity — Titrimetric method
Edition 1
1974-04
Read sample
ISO 2993:1974
8043
Published (Edition 1, 1974)
This publication was last reviewed and confirmed in 2019. Therefore this version remains current.

ISO 2993:1974

ISO 2993:1974
8043
Language
Format
CHF 42
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Abstract

Applicable to products having a free acidity, expressed as H2 SO4 , equal to or more than 0.01 % (m/m). Dissolution of a test portion in Water and titration with standard volumetric sodium hydroxide solution in the presence of an indicator. The indicator must have a colour change in the pH range between 5.2 and 5.6. Has also been approved by the IUPAC.

General information

  •  : Published
     : 1974-04
    : International Standard under systematic review [90.20]
  •  : 1
     : 2
  • ISO/TC 47
    71.060.50 
  • RSS updates

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