BIS Invites Public Comments on Revised Standard for Pure Grade Sodium Bromide
The Bureau of Indian Standards (BIS) invites public comments on the first revision of the standard for sodium bromide, pure (IS 2780) until 24 June. Sodium bromide is widely used in the chemical industry and laboratories for the preparation of bromides and in medicine. The revised standard specifies the requirements and testing procedures for pure sodium bromide.
Revised Standard: Specifications and Test Methods
This standard was originally published in 1964. In this first revision, instrumental test methods for the determination of chlorides, sulphates, iron, lead and arsenic have been added as alternative test methods. In addition, editorial corrections have been made where required. A reference clause has also been incorporated. Furthermore, the clause on packing and marking has been updated.
According to the notice, pure sodium bromide should be free from impurities and foreign matter. It should appear as tiny, colourless, transparent or opaque crystals or as a white granular powder. The chemical must be stored in tightly sealed containers as it readily absorbs water from the environment.
The following table contains requirements for sodium bromide when tested by the methods specified in Annex A of the revised standard
| Characteristic | Requirement for grade |
| Sodium bromide | Minimum % by weight of dried material 98.5 |
| Chlorides | Maximum % by weight 0.6 |
| Bromates | Maximum % by weight 0.001 |
| Heavy metals as lead | Maximum % by weight 0.001 |
| Iron | Maximum % by weight 0.008 |
| Sulphates | Maximum % by weight 0.06 |
| Arsenic and its oxides | Maximum of 10ppm |
| Alkali (as Na2CO3) | Maximum % by weight 0.02. |
Packaging and Labelling
The product must be packaged in clean galvanized iron drums lined with polyethylene or in glass bottles. Each container must be labelled with the following information:
a) Name and grade of the material;
b) Net mass of the material;
c) Date of manufacture;
d) Manufacturer’s name and/or his recognized trade-mark, if any; and
e) Batch number.
Containers of analytical reagent grade material should also be labelled with analytical data according to the revised standard.
BIS Certification Marking
The product(s) conforming to the requirements of this standard may be certified under the conformity assessment schemes established under the provisions of the Bureau of Indian Standards Act, 2016 and the rules and regulations made thereunder and the products may be marked with the standard mark.
We acknowledge that the above information has been compiled from Bureau of Indian Standards (BIS).
