1-NAPHTHOLPHTHALEIN (PH INDICATOR)

Product CodeB-01782ABRANDBio-Chem
GradeIndicatorCAS No596-01-0
Molecular FormulaC28H18O4Molecular Weight418.45
H.S.Code3204.90000Shelf Life60 Months
Purity98 %

Physical Properties

Physical state at 20 °CSolidColourBlack powder
OdourCharacteristic odourVapour density14.44
Melting point/ Freezing point [°C]238 - 240 °CSolubility in water [% weight]Insoluble in water
Partition coefficient Log Pow octanol / water at 20°C5.41

Packaging

Specification

Appearance
Light Pink to Beige to Red-Brown Powder
Loss on drying (at 105°C)
Max 5%
pH transition range (7.1 – 8.3)
Brownish pink to blue
Absorption maxima (Buffer pH 7.1)
471 – 485 nm
Absorption maxima (buffer pH 8.3)
649 – 654 nm

Safety Information and Hazard Symbols

Symbol: GHS07 ,GHS08
Signal Word: Warning
Hazardous Statement: H315-H319-H335
Precaution Statement: P261-P305 + P351 + P338

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