α-Naphtholbenzein structure
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Common Name | α-Naphtholbenzein | ||
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CAS Number | 145-50-6 | Molecular Weight | 374.431 | |
Density | 1.3±0.1 g/cm3 | Boiling Point | 578.6±50.0 °C at 760 mmHg | |
Molecular Formula | C27H18O2 | Melting Point | 230-235 °C(lit.) | |
MSDS | Chinese USA | Flash Point | 242.3±22.7 °C |
Use of α-Naphtholbenzeinα-Naphtholbenzein (p-Naphtolbenzein) is a dye. α-Naphtholbenzein can be used as a pH indicator. α-Naphtholbenzein has a visual transition from yellow (pH0-8.2) to turquoise (pH10). α-Naphtholbenzein is often used during sequential injection analysis technique done for acid-base titrations[1]. |
Name | p-Naphtholbenzein |
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Synonym | More Synonyms |
Description | α-Naphtholbenzein (p-Naphtolbenzein) is a dye. α-Naphtholbenzein can be used as a pH indicator. α-Naphtholbenzein has a visual transition from yellow (pH0-8.2) to turquoise (pH10). α-Naphtholbenzein is often used during sequential injection analysis technique done for acid-base titrations[1]. |
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Related Catalog | |
References |
Density | 1.3±0.1 g/cm3 |
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Boiling Point | 578.6±50.0 °C at 760 mmHg |
Melting Point | 230-235 °C(lit.) |
Molecular Formula | C27H18O2 |
Molecular Weight | 374.431 |
Flash Point | 242.3±22.7 °C |
Exact Mass | 374.130676 |
PSA | 37.30000 |
LogP | 7.11 |
Vapour Pressure | 0.0±1.7 mmHg at 25°C |
Index of Refraction | 1.724 |
Stability | Stable. Combustible. Incompatible with strong oxidizing agents. |
Water Solubility | insoluble |
Personal Protective Equipment | dust mask type N95 (US);Eyeshields;Gloves |
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Hazard Codes | Xi:Irritant; |
Risk Phrases | R36/37/38 |
Safety Phrases | S26-S36-S37/39 |
RIDADR | NONH for all modes of transport |
WGK Germany | 3 |
HS Code | 29145000 |
~34% α-Naphtholbenzein CAS#:145-50-6 |
Literature: Lenze; Kallmayer Pharmazie, 1995 , vol. 50, # 1 p. 36 - 38 |
Precursor 2 | |
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DownStream 0 |
HS Code | 2914501900 |
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Summary | 2914501900 other ketone-phenols。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0% |
A-NAPHTHOLBENZEIN |
Alpha-Naphtholbenzein |
4-(α-(4-Hydroxy-1-naphthyl)benzylidene)naphthalen-1(4H)-one |
P-NAPHTHOLBENZEIN TS |
(E)-4-((4-hydroxynaphthalen-1-yl)(phenyl)methylene)naphthalen-1(4H)-one |
1-NAPHTHOLBENZEIN |
1(4H)-Naphthalenone, 4-[(4-hydroxy-1-naphthalenyl)phenylmethylene]-, (4E)- |
P-NAPTHOLBENZEIN |
α-Naphtholbenzein |
(4E)-4-[(4-Hydroxy-1-naphthyl)(phenyl)methylene]-1(4H)-naphthalenone |
1(4H)-Naphthalenone, 4-[α-(4-hydroxy-1-naphthyl)benzylidene]- |
MFCD00078492 |
EINECS 230-116-9 |