1. Chemicals used for treatment of water intended for human consumption. Sodium hydrogen sulfite. (15th June 1999) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. BS EN 12120. Chemicals used for treatment of water intended for human consumption. Sodium hydrogen sulfite. (27th May 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (22 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Specification for photographic grade sodium metabisulphite, anhydrous. (28th April 1978) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
4. Specification for photographic grade potassium metabisulphite. (28th April 1978) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
5. Photography. Processing chemicals. Specifications for anhydrous sodium metabisulfite. (15th March 1995) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
6. Photography. Processing chemicals. Specifications for dipotassium disulfite (potassium metabisulfite). (15th February 1997) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
7. Tracked Changes. Chemicals used for treatment of water intended for human consumption. Sodium hydrogen sulfite. (29th September 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (56 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
8. Chemicals used for treatment of water intended for human consumption. Sodium hydrogen sulfite. (29th April 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (24 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗