Sodium thiosulfate pentahydrate for analysis EMSURE® ACS,ISO,Reag. Ph Eur
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Sodium thiosulfate pentahydrate for analysis EMSURE® ACS,ISO,Reag. Ph Eur
Brand : MERCK
Packaging : 1kg
CAS number : 110-86-1
EC index number : 613-002-00-7
EC number : 203-809-9
Grade : ACS,Reag. Ph Eur
Hill Formula : C₅H₅N
Molar Mass : 79.1 g/mol
HS Code : 2933 31 00
Properties
| Density | : 1.74 g/cm3 (20 °C) |
| Melting Point | : 48 °C |
| pH value | : 6.0 - 7.5 (100 g/l, H₂O, 20 °C) |
| Bulk density | : 1000 kg/m3 |
| Solubility | : 701 g/l |
| Assay (iodometric) | : 99.5 - 101.0 % |
| Identity | : passes test |
| Appearance of solution | : passes test |
| Insoluble matter | : ≤ 0.005 % |
| pH-value (5 %; water, 25 °C) | : 6.0 - 7.5 |
| pH-value (10 %; water) | : 6.0 - 7.5 |
| Chloride (Cl) | : ≤ 0.008 % |
| Sulfate and sulphite (as SO₄) | : ≤ 0.1 % |
| Sulfide (S) | : passes test |
| Heavy metals (as Pb) | : ≤ 0.001 % |
| Total nitrogen (N) | : ≤ 0.002 % |
| Ca (Calcium) | : ≤ 0.002 % |
| Cu (Copper) | : ≤ 0.0005 % |
| Fe (Iron) | : ≤ 0.0005 % |
| K (Potassium) | : ≤ 0.001 % |
| Mg (Magnesium) | : ≤ 0.001 % |
| Pb (Lead) | : ≤ 0.0005 % |
| Corresponds to ACS, ISO, Reag. Ph Eur | |
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