Revised Standard from Last Update.

1. SCOPE

1.1 This standard prescribes the requirements and the methods of sampling and test for mineral gypsum. It also covers selenite, a colourless and transparent variety of gypsum which occurs as distinct monoclinic crystals, especially in clay rocks.

1.2 This standard does not cover marine gypsum obtained from marine brine which is covered under a separate Indian Standard (see IS 4256).

2. REFERENCES

The standards given below contain provisions which through reference in this text, constitute provisions of this Indian Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of these standards:

IS 1070 : 2023 Reagent grade water - Specification (fourth revision)

IS 1288 : 1982 Methods of test for mineral gypsum (second revision)

IS 1289 : 1960 Methods for sampling of mineral gypsum

IS 3025 (Part 2) 2019/ISO 11885 : 2007 Methods of sampling and test (physical and chemical) for water and wastewater: Part 2 Determination of selected elements by inductively coupled plasma optical emission spectrometry (ICP-OES) (first revision)

IS 4256 : 1967 Hydrated calcium sulphate from marine brine - Specification (first revision)

IS 6046 : 1982 Specification for gypsum for agricultural use (first revision)