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HomeProduct name listALPHA-NAPHTHOLBENZEIN

ALPHA-NAPHTHOLBENZEIN

Synonym(s):4,4′-(α-Hydroxybenzylidene)di-1-naphthol;p-naphtholbenzein

  • CAS NO.:6948-88-5
  • Empirical Formula: C27H20O3
  • Molecular Weight: 392.45
  • MDL number: MFCD00003979
  • EINECS: 230-116-9
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-04-23 13:52:06
ALPHA-NAPHTHOLBENZEIN Structural

What is ALPHA-NAPHTHOLBENZEIN?

Chemical properties

RED-BROWN POWDER

The Uses of ALPHA-NAPHTHOLBENZEIN

α-Naphtholbenzein can be used as an indicator during non-aqueous titration.

Purification Methods

-{4-hydroxynaphth-1-yl})-benzyl alcohol] B2319 M 392.5, m 122-125o, ~ 9.3. Crystallise the alcohol from EtOH, aqueous EtOH or glacial acetic acid. pKEst [Beilstein 6 H 1150.B2319]

Properties of ALPHA-NAPHTHOLBENZEIN

Melting point: 230-235 °C(lit.)
Boiling point: 477.16°C (rough estimate)
Density  1.1098 (rough estimate)
refractive index  1.5460 (estimate)
storage temp.  Amber Vial, Room Temperature
solubility  DMSO (Slightly), Methanol (Slightly)
form  Powder
pka 9.14±0.40(Predicted)
color  Red-brown
PH Range 8.5(YELLOW)-9.8(GREEN)
CAS DataBase Reference 6948-88-5(CAS DataBase Reference)

Safety information for ALPHA-NAPHTHOLBENZEIN

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes P261:Avoid breathing dust/fume/gas/mist/vapours/spray.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for ALPHA-NAPHTHOLBENZEIN

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