O-CRESOLPHTHALEINE COMPLEXONE (PHTHALEIN PURPLE) LR 
Assay (Alkalimetric) Min. 99%
Identity (IR spectrum) Passes test
UV Absorption (250 nm; 5%;
1cm; water) Max. 0.05
Chloride (Cl) Max. 0.005%
Sulfate (SO4) Max. 0.005%
Heavy metals (as Pb) Max. 0.005%
Sodium (Na) Max. 0.005%
Loss on drying (105°C)
Biological buffer, pKa at 20°C About 7.50
| CAS No. | 7365-44-8 |
|---|---|
| Molecular Formula | C6H15NO6S |
| Molecular Weight | 229.25 |
| HS Code | 2922.1990 |
| Safety Statement | 22-24/25 |
| Packing | 5 GM |
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N-tris (hydroxymethyl) Methyl-2-aminoethane Sulphonic Acid
