Bureau of Indian Standards Closes Consultation on Revised Standard for Sodium Chloride.
The Bureau of Indian Standards has recently closed its consultation on a revised standard for sodium chloride used as an analytical reagent. The consultation, which closed on 25 June 2024, outlined the specifications, sampling techniques, and testing procedures for sodium chloride.
Key changes in the revised standard include
- Alternative instrumentation test methods: New methods have been introduced for the determination of nitrates, sulphates, iron, lead, calcium, magnesium and arsenic.
- Material form: The standard now specifies that the material should be in the form of cubes, white crystals or crystalline powder.
- Packaging revisions: mandating that containers are required to be labelled with the material’s name, manufacturer’s name and trademark, the net mass and the batch number.
- Certification Requirements: Products meeting the requirements of this standard must be certified under the conformity assessment scheme according to the provisions of the Bureau of Indian Standards Act, 2016 and its associated Rules and Regulation, and should bear the standard mark.
Requirements for sodium chloride used as an analytical reagent are given below:
| Characteristic | Requirement | Method of test (Ref. to Clause No of Annex B) |
| Sodium chloride, percent by mass, min. | 99.9 | B-2 |
| Sulphate (as SO4), percent by mass, max. | 0.002 | B-3 or B-18 |
| Nitrate (as NO3), percent by mass, max. | 0.0005 | B-4 or B-18 |
| Phosphates (as PO4), percent by mass, max. | 0.0005 | B-5 |
| Iron (as Fe), percent by mass, max. | 0.0003 | B-6 or B-17 |
| Heavy metals (as Pb), percent by mass, max. | 0.0003 | B-7 or B-17 |
| Barium (as Ba), percent by mass, max. | 0.001 | B-8 |
| Calcium and Magnesium together (as Ca), percent by mass, max. | 0.005 | B-9 or B-17 |
| Potassium (as K), percent by mass, max. | 0.005 | B-10 |
| Ammonium salts (as NH4), percent by mass, max. | 0.0005 | B-11 |
| Arsenic (as As), percent by mass, max. | 0.00005 | B-12 or B-17 |
| pH of 10 percent solution | Between 5.0 and 9.0 | B-13 |
| Bromide and Iodide (as Br), percent by mass, max. | 0.005 | B-14 |
| Insoluble matter, percent by mass, max. | 0.003 | B-15 |
| Ferrocyanide [as Fe (CN)6], percent by mass, max. | 0.0001 | B-16 |
Further details of the requirements, sampling and testing methods can be found here.
We acknowledge that the above information has been compiled from Bureau of Indian Standards.
