Assay (alkalimetric) % Min 99
UV absorption (250nm, 20g/l, 1 cm, water) Max 0.05
Chloride (Cl) % Max 0.005
Sulfate (SO4) % Max 0.005
Heavy metals (as Pb) % Max 0.0005
Sodium (Na) % Max 0.005
Loss on drying (at 105°C) % Max 0.2
Biological buffer, pKa at 20°C 8.40
CAS No. | 29915-38-6 |
---|---|
Molecular Formula | C7H17NO6S |
Molecular Weight | 243.28 |
HS Code | 2922.1980 |
Packing | 25 gm |
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After the samples become freeze-dried preparations, they are more stable, especially for high temperature sensitive drugs, and most of them can be transported and stored at 0-4℃ or even normal temperature after freeze-dried, so the transportation and storage cost and inactivation risk are greatly reduced. Compared with traditional drying methods, the bioactive materials can restore their pre-freeze-dried conformation and biological function after redissolution. Therefore, freeze-drying is the safest method with the least impact on the properties of the drying materials.
Reagents
2-[5-(2-Hydroxy-5-sulfophenyl)-3-phenyl-1-formazyl]benzoic acid monosodium salt, 2-Carboxy-2'-hydroxy-5'-sulfoformazyl-benzene monosodium salt; Zincon monosodium salt
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