α-Naphtholbenzein
Modify Date: 2025-08-23 08:18:46
α-Naphtholbenzein structure
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Common Name | α-Naphtholbenzein | ||
|---|---|---|---|---|
| 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 |
|---|---|
| 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]. |
|---|---|
| Related Catalog | |
| References |
| Density | 1.3±0.1 g/cm3 |
|---|---|
| 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 |
|---|---|
| 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 | |
|---|---|
| DownStream 0 | |
| HS Code | 2914501900 |
|---|---|
| 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 |
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- Shanghai Nianxing Industrial Co., Ltd
- China
- Product Name: α-Naphtholbenzein
- Price: Check
- Purity: 98.0%
- Delivery: 10 Day
- Contact: Yang
- Email: sales@echemcloud.com
- Shanghai Jizhi Biochemical Technology Co., Ltd
- China
- Product Name: α-Naphtholbenzein
- Price: ￥338.0/5g
- Purity: 98.0%
- Delivery: Inquiry
- Contact: Liu jia
- Email: 2130147988@qq.com
- Dayang Chem (Hangzhou) Co., Ltd.
- China
- Product Name: p-Naphtholbenzein
- Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
- Purity: 98.0%
- Delivery: Inquiry
- Contact: Ms Wang
- Email: enquiry@dycnchem.com
- Henan Tianfu Chemical Co., Ltd.
- China
- Product Name: p-Naphtholbenzein
- Price: $Inquiry/1kg $Inquiry/25kg $Inquiry/1000kg $Inquiry/10ton
- Purity: 99.0%
- Delivery: Inquiry
- Contact: Anson
- Email: info@tianfuchem.com
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