Purified water Specification

S.No	Test	Acceptance criteria
1	pH	Between 5.0 to 7.0
2	Description	Clear, Colorless,odorless and testless liquid
3	Total Organic Compound (TOC)	Not more than 500 ppb
5	Total Free Chlorine (TFC)	Not more than 5 ppm
6	Total Suspended Solids (TSS)	Not more than 500 ppm
7	Total Hardness	Not more than 500 ppm
8	Total Dissolved Solids (TDS)	Less than 0.1 ppm
9	Conductivity (at 250C)	Less than 1µS/ cm.
10	Acidity or Alkalinity	On addition of Methyl red solution the resulting solution should be not red. On addition of Bromo thymol blue solution the resulting solution should be not blue.
11	Ammonium	Test solution should not be colored in intense with compared to standard solution.
12	Calcium and Magnesium	A pure blue color should be produced.
13	Heavy metals	Less than 0.1 ppm
14	Chlorides	The soloution shows no change in appearance. (The appearance of solution should not be changed for at least 15 minutes.)
15	Nitrates	Less than 0.2 ppm
16	Sulphates	The soloution shows no change in appearance. (The appearance of solution should not be changed for at least 1 hour.)
17	Oxidasable substances	The Solution remains faintly pink.
18	Residue on evaparation	Less than 0.001 %
19	Bacterial Endotoxins	Not applicable
20	Microbial Limit Test
	Total Bacterial Count	Not more than 100 cfu/1mL
	Total Fungal count	Not more than 10 cfu/1mL
21	Specified Microorganisms
	Escherichia coli	Should be absent
	Salmonella Spp	Should be absent
	Psedomonas aeruginosa	Should be absent
	Staphylococcus aureus	Should be absent