Technical Data Sheet
1-Naphtholbenzein, 5 g
extra pure
Pack Qty.
Pack.
α-Naphtholbenzein, p-Naphtholbenzein, 4,4'-(α-Hydroxybenzylidene)di-1-naphthol
Empirical formula C27H18O2
Molar mass (M) 374,44 g/mol
Melting point (mp) 245 °C
WGK 1
CAS No. 145-50-6
EG-Nr. 205-656-3
Molar mass (M) 374,44 g/mol
Melting point (mp) 245 °C
WGK 1
CAS No. 145-50-6
EG-Nr. 205-656-3
Dissolve 0.1 g in 100 ml 2-propanol
Indicator pH 8.5-9.8
Indicator pH 8.5-9.8
€25.30/Pack Qty.
excl. VAT. | 5 g per Pack Qty.
Art. No. 1H56.1
In production
from 6 Pack Qty.
€24.04/Pack Qty.
from 24 Pack Qty.
€22.77/Pack Qty.
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Product details
1-Naphtholbenzein extra pure
Technical Information
| Absorption maximum | 622 – 626 nm (in 0,1 M HClO4) |
| Colour conversion | yellow - blue-green |
| Transition range pH | 8,5 - 9,8 |
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1-Naphtholbenzein
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| Art. No. | Pack Qty. | Pack. | Price | Quantity | |
|---|---|---|---|---|---|
| 1H56.1 | 5 g | glass |
€25.30 |
|
|
| 1H56.2 | 10 g | glass |
€42.90 |
|
|
| 1H56.3 | 25 g | glass |
€85.90 |
|
|
|
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Downloads / MSDS
General information
Indicators and Dyes
Carl ROTH offers many indicators and dyes of high purity, which can be used in special applications.
Certificates of Analysis
Type analysis
| Appearance | orange red brown to black powder |
| Maximum absorption | 622-626 nm |
| pH-transition range | 8.5 (yellow)-9.8 (green-blue) |