α-Naphthol phthalein
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About α-Naphthol phthalein
Zemixal supplies α-Naphthol phthalein within its laboratory Chemicals & Reagents portfolio. For your records, the material is defined by CAS 596-01-0, formula C28H18O4 and molar mass 418.4 g/mol. Expect light pink to beige to red-brown powder.
Where it is used
- Titration end-point detection
- pH determination
- Analytical testing
- Fluorescent labelling
Handling and storage
Hazard communication follows GHS (Warning: H315, H319 and H335). Our SDS lists exposure controls and first-aid measures.
Standard pack sizes are 1 g, 5 g, 25 g, 100 g and 1 kg, and custom quantities are quoted on request. You receive a batch certificate of analysis and a 16-section SDS with each order. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.
Typical uses
- Titration end-point detection
- pH determination
- Analytical testing
- Fluorescent labelling
Applications
Specifications and identifiers
| Product name | α-Naphthol phthalein |
|---|---|
| Catalogue number | ZX-000427 |
| CAS number | 596-01-0 |
| IUPAC name | 3,3-bis(4-hydroxynaphthalen-1-yl)-2-benzofuran-1-one |
| Molecular formula | C28H18O4 |
| Molar mass | 418.4 g/mol |
| Exact mass | 418.1205 |
| Physical form | Powder |
| Appearance | Light pink to beige to red-brown powder |
| XLogP3 | 6.3 |
| H-bond donors / acceptors | 2 / 4 |
| Topological polar surface area | 66.8 Ų |
| HS code | 29322990 |
| InChIKey | HQHBAGKIEAOSNM-UHFFFAOYSA-N |
| SMILES | C1=CC=C2C(=C1)C(=CC=C2O)C3(C4=CC=CC=C4C(=O)O3)C5=CC=C(C6=CC=CC=C65)O |
| PubChem CID | 68993 |
| Synonyms | a-Naphtholphthalein, alpha-Naphtholphthalein, Naphtholphthalein, 3,3-Bis(4-hydroxy-1-naphthyl)phthalide, 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxy-1-naphthalenyl)-, 1-Naphtholphthalein, 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one, 3,3-bis(4-hydroxynaphthalen-1-yl)-1,3-dihydro-2-benzofuran-1-one, A-Naphtholphthalein, naphtholphthalein blue, a-Naphtolphtalein, .alpha. Naphtholphthalein |
Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.
Safety and GHS hazards
Signal word Warning
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501
Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.
Pack sizes
| 1 g | Quoted on request | |
| 5 g | Quoted on request | |
| 25 g | Quoted on request | |
| 100 g | Quoted on request | |
| 1 kg | Quoted on request |
Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.
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Other grades with CAS 596-01-0
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