Phenolphthalein can be used in a 1% alcoholic solution as an indicator in titrations of mineral and organic acids and most alkalies. Not suitable for ammonia. Very sensitive to CO2; and, in estimating carbonates, the liquid must be boiled. Borax can be titrated with phenolphthalein as an indicator only when glycerol is present, because the color gradually fades away as the acid is added. Usable with a few alkaloids.
Grade: USP/NF Grade
Assay: ≥98%
Key Applications: Indicator in titrations of mineral and organic acids and most alkalies
Product Type: Biochemicals
Density: 1.299 (water = 1)(Lit.)
Boiling Point: Decomposes before boiling (Lit.)
Melting Point: ≥258°C
UV/Visible Absorbance: λmax 552 nm λmax: 374 nm (2nd)
Presentation: White Powder
Format: Powder
pH: pH Interval: 8.2 (colorless) - 9.8 (pink to deep red)(Lit.)
pKa: 9.7 at 25°C(Lit.)
Heavy Metals: ≤0.0015%
Loss on Drying: ≤1.0%
Residue on ignition: ≤0.1%
Solubility: Soluble in alcohol, ether, methanol (10 mg/mL - clear, yellow solution), ethanol(50 mg/mL), acetone; very slightly soluble in chloroform; almost insoluble in water.
Storage & Handling: Store at Room Temperature(15-30°C).