1-NAPHTHOLPHTHALEIN

1-NAPHTHOLPHTHALEIN Indicator grade

a-Naphtholphthalein

Article No.

04770

Grade

Indicator grade

Purity

CAS No.

596-01-0

Molecular Formula

C₂₈H₁₈O₄

Molecular Weight

418.45

H.S. Code

3204.9000

Shelf Life

60 Months

MSDS

Certificate of Analysis (COAs)

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

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%

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

Revision Date : 06-Jul-2021