1.06202
1-Naphtholbenzein
pH indicator, Reag. Ph Eur
Synonym(s):
1-Naphtholbenzein
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About This Item
Product Name
1-Naphtholbenzein, indicator Reag. Ph Eur
agency
reag. Ph. Eur.
Quality Segment
form
solid
loss
≤7% loss on drying, 105°C
visual transition interval
8.0-9.6, apricot to turquoise
mp
243-245 °C
bulk density
120‑300 kg/m3
λmax
622-626 nm (perchloric acid (0,1 mol/l) in acetic acid)
storage temp.
2-30°C
SMILES string
Oc1c2c(c(cc1)\C(=C4\c5c(cccc5)C(=O)C=C\4)\c3ccccc3)cccc2
InChI
1S/C27H18O2/c28-25-16-14-23(19-10-4-6-12-21(19)25)27(18-8-2-1-3-9-18)24-15-17-26(29)22-13-7-5-11-20(22)24/h1-17,28H/b27-24+
InChI key
VDDWRTZCUJCDJM-SOYKGTTHSA-N
Application
- Use of turbidimeter for measurement of solid catalyst system component in a reactor feed.: This study discusses the application of a turbidimeter to measure the concentration of solid catalyst components in a reactor feed, highlighting its significance in optimizing catalytic processes (Elsevier, 2020).
Analysis Note
Identity (UV/VIS-Spectrum): passes test
Absorption maximum λmax.(perchloric acid (0,1 mol/l) in acetic acid): 622 - 626 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l;perchloric acid (0,1 mol/l) in acetic acid;calculated on dried substance): 640 - 950
Transition range: pH 8,0 - pH 9,6; apricot - turquoiseblue
Loss on Drying (105°C): ≤ 7 %
Suitability as indicator (for non-aqueous titration): passes test
hcodes
pcodes
Hazard Classifications
Aquatic Chronic 4
Storage Class
11 - Combustible Solids
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
Certificates of Analysis (COA)
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