2,3-Dihydroxynaphthalene
- CAS No.
- 92-44-4
- Chemical Name:
- 2,3-Dihydroxynaphthalene
- Synonyms
- Naphthalene-2,3-diol;2,3-Dihydroxy;2,3-DIHYDROXYNAPHTHALENE, SUBL.;2,3-NAPHTHALENEDIOL;Naphthalin-2,3-diol;Dihydroxynaphthalene;Naphthalenediol-(2,3);3-Dihydroxynaphthalene;2,3-Dihydroxynapthalene;2,3-DIHYDROXYNAPHTHALENE
- CBNumber:
- CB8736136
- Molecular Formula:
- C10H8O2
- Molecular Weight:
- 160.17
- MOL File:
- 92-44-4.mol
- MSDS File:
- SDS
- Modify Date:
- 2024/8/6 16:32:36
| Melting point | 161-165 °C (lit.) 162-164 °C |
|---|---|
| Boiling point | 246.06°C (rough estimate) |
| Density | 1.0924 (rough estimate) |
| vapor pressure | 0.8 hPa (149 °C) |
| refractive index | 1.5178 (estimate) |
| Flash point | 175 °C |
| storage temp. | Store below +30°C. |
| solubility | 4g/l |
| form | Powder |
| pka | 9.10±0.40(Predicted) |
| color | White to pinkish to beige-grayish |
| PH | 6 (1g/l, H2O, 20℃) |
| Water Solubility | slightly soluble |
| BRN | 742375 |
| CAS DataBase Reference | 92-44-4(CAS DataBase Reference) |
| NIST Chemistry Reference | 2,3-Naphthalenediol(92-44-4) |
| EPA Substance Registry System | 2,3-Naphthalenediol (92-44-4) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS05,GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H302-H318 | |||||||||
| Precautionary statements | P264-P270-P280-P301+P312-P305+P351+P338-P501 | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 36/37/38 | |||||||||
| Safety Statements | 26-37/39 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | QJ4750000 | |||||||||
| F | 10-23 | |||||||||
| Autoignition Temperature | >330 °C | |||||||||
| TSCA | Yes | |||||||||
| HS Code | 29072900 | |||||||||
| Toxicity | LD50 orally in Rabbit: 970 mg/kg | |||||||||
| NFPA 704 |
|
2,3-Dihydroxynaphthalene price More Price(9)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich(India) | 8.14578 | 2,3-Naphthalenediol for synthesis | 92-44-4 | 50G | ₹12080 | 2022-06-14 | Buy |
| Sigma-Aldrich | 37760 | 2,3-Dihydroxynaphthalene ≥98.0% (HPLC) | 92-44-4 | 50G | ₹12318.85 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 37760 | 2,3-Dihydroxynaphthalene ≥98.0% (HPLC) | 92-44-4 | 50G | ₹12318.85 | 2022-06-14 | Buy |
| Sigma-Aldrich | 37760 | 2,3-Dihydroxynaphthalene ≥98.0% (HPLC) | 92-44-4 | 250G | ₹51570.3 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 37760 | 2,3-Dihydroxynaphthalene ≥98.0% (HPLC) | 92-44-4 | 250G | ₹51570.3 | 2022-06-14 | Buy |
2,3-Dihydroxynaphthalene Chemical Properties,Uses,Production
Chemical Properties
Off white to redish white powder. 2,3-Naphthalenediol [92-44-4], mp 161℃, gives a dark blue color with iron(III) chloride; is aminated to 2- amino-3-naphthol at 140℃ and 2,3-naphthalenediamine at 240℃; and couples with diazotized anilines in the 1- or 1,4-positions.
Uses
2,3-Dihydroxynaphthalene is used in making dyes, pigments, fluorescent whiteners, tanning agents, antioxidants, and antiseptics.
General Description
2,3-Dihydroxynaphthalene is a polyhydroxy phenol. It is an aromatic dihydroxy compound having hydroxyl groups at ortho positions. Its reaction with molybdenum(VI) complexes has been reported. The asymmetric oxidative coupling polymerization of 2,3-dihydroxynaphthalene using the Cu(I)-bisoxazoline complex as catalyst has been reported to afford poly(2,3-dihydroxy-1,4-naphthylene), having a continuous 1,1′-bi-2-naphthol main chain structure. The nitrodisplacement reaction between nitrophthalodinitriles and 2,3-dihydroxynaphthalene has been investigated.
Health Hazard
2,3-Naphthalenediol shows low toxicity andmild irritant actions on the skin and eyes. Theoral LD50 value for rats of a 5% solutionin propylene glycol may be on the orderof 675 mg/kg (calculated by the method ofWeil). The intravenous LD50 value for miceis 56 mg/kg. At 1% concentration, it causedslight eye irritation in female albino rabbitsand exhibited erythemal response in guineapigs. At the 0.1% level (concentration in hairdye), it had no reaction on human skin. Thiscompound was nonmutagenic in Salmonellatyphimurium strain tests.
There is very little information in the literatureon the toxicity of 2,3-naphthalenediol.Assessment by the CIR expert panel on thesafety of this compound as used in cosmeticshas been inconclusive (Cosmetic, Toiletryand Fragrance Association 1987b).
Synthesis
2,3-Dihydroxynaphthalene is prepared by caustic fusion of 3-hydroxynaphthalene-2,6-disulfonic acid followed by treatment with dilute sulfuric acid under pressure, or by acid desulfonation of 2,3-dihydroxynaphthalene-6-sulfonic acid.
2,3-Dihydroxynaphthalene Preparation Products And Raw materials
Raw materials
Preparation Products
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| Vardhaman P Golechha | 9704422000 | Telangana, India | 294 | 58 | Inquiry |
| JSK Chemicals | +919879767970 | Gujarat, India | 3756 | 58 | Inquiry |
| Prolife Bio Chemical Industries Pvt Ltd | +91-9825114995 +91-9825114995 | Gujarat, India | 74 | 58 | Inquiry |
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| Spectrochem Private Limited | 08048372608Ext 246 | Maharashtra, India | 1056 | 58 | Inquiry |
| Chemstar International | 91-22-28345969 | Maharashtra, India | 32 | 58 | Inquiry |
| RRJ Dyes & Intermediates Limited | +91 79 26408156 | Gujarat, India | 14 | 58 | Inquiry |
| Chempro Group | 91-22-40945230 | Maharashtra, India | 11 | 58 | Inquiry |
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