1-NAPHTHOLPHTHALEIN
1-NAPHTHOLPHTHALEIN Indicator grade
Short Name: 1-NAPHTHOLPHTHALEIN
Synonym: a-Naphtholphthalein
Basic Details
Article No.
LG3171
Grade
Indicator grade
Purity
CAS No.
596-01-0
HS Code
3204.9000
Shelf Life
60 Months
Packings Avialable
Physical Properties
Physical state at 20 °C
Solid
Colour
Black powder
Odour
Characteristic odour
Melting point/ Freezing point [°C]
238 - 240 °C
Vapour density
14.44
Solubility in water [% weight]
Insoluble in water
Partition coefficient Log Pow octanol /water at 20°C
5.41
Chemical Specifications
Appearance
Light Pink to Beige to Red-Brown Powder
Infrared spectrum
Conforms
Absorption maxima (0.1N NaOH)
648 to 654 nm
Specific absorptivity 1%/1cm (at λmax)
Min 550.0
Visual transition interval
from pH 7.3 (pink-yellow) to pH 8.7 (green-blue)
Loss on drying (at 110°C; 1 hr)
Max 5.0%
Safety Information & Hazard Symbols
Symbol
GHS07
Signal Word
Warning
Hazardous Statement
H315-H319-H335
Precaution Statement
P261-P305 + P351 + P338