Description
Brand : CDH
Packings : 500 Gram
Grade : AR /ACS Reagents
PARAMETER LIMIT
- Description Fine white crystalline powder
- Solubility 10% solution in water is clear and colourless.
- Appearance of solution Passes test.
- Identification Passes tests.
- Minimum Assay (Iodometric) 98.0%
- Assay (as SO2) 65.0 – 67.4%
- pH of(5%Solution in water) 3.5 – 5.0
MAXIMUM LIMIT OF IMPURITIES
– Insoluble matter 0.005%
– Acidity Passes test
– Chloride (Cl) 0.005%
– Arsenic (AS) 0.0005%
– Iron (Fe) 0.0005%
– Heavy metals (as Pb) 0.001%
– Selenium (Se) 0.0001%
– Sodium sulphite 0.75%
– Sodium sulphate 1.0%
– Thiosulphate 0.05%
