1,5-Dihydroxy naphthalene
- CAS No.
- 83-56-7
- Chemical Name:
- 1,5-Dihydroxy naphthalene
- Synonyms
- 1,5-DIHYDROXYNAPHTHALENE;Naphthalene-1,5-diol;1,5-NAPHTHALENEDIOL;CI 76625;c.i.76625;C.I. 76625;oxidationbase;Oxidation Base;durafurdevelopere;1,5-Naphthalindiol
- CBNumber:
- CB2685052
- Molecular Formula:
- C10H8O2
- Molecular Weight:
- 160.17
- MOL File:
- 83-56-7.mol
- MSDS File:
- SDS
- Modify Date:
- 2024/7/26 17:49:17
| Melting point | 259-261 °C (dec.) (lit.) |
|---|---|
| Boiling point | 246.06°C (rough estimate) |
| Density | 1.0924 (rough estimate) |
| vapor pressure | 0-0Pa at 25℃ |
| refractive index | 1.5418 (estimate) |
| Flash point | 252°C |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | 0.6g/l |
| form | Solid |
| pka | 9.28±0.40(Predicted) |
| color | Pale Beige to Very Dark Brown |
| PH | 6 (0.5g/l, H2O, 20℃) |
| Water Solubility | Soluble in water. |
| BRN | 2044951 |
| LogP | 1.7-1.82 at 23℃ |
| CAS DataBase Reference | 83-56-7(CAS DataBase Reference) |
| NIST Chemistry Reference | 1,5-Naphthalenediol(83-56-7) |
| EPA Substance Registry System | 1,5-Naphthalenediol (83-56-7) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H302-H319 | |||||||||
| Precautionary statements | P264-P270-P280-P301+P312-P305+P351+P338-P337+P313 | |||||||||
| Hazard Codes | Xn,N,Xi | |||||||||
| Risk Statements | 22-51/53-36-36/37/38 | |||||||||
| Safety Statements | 22-24/25-61-39-29-26 | |||||||||
| WGK Germany | 2 | |||||||||
| RTECS | QJ4740000 | |||||||||
| F | 8-21 | |||||||||
| TSCA | Yes | |||||||||
| HS Code | 29072900 | |||||||||
| NFPA 704 |
|
1,5-Dihydroxy naphthalene price More Price(11)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich(India) | D115606 | 1,5-Dihydroxynaphthalene 97% | 83-56-7 | 100G | ₹3583.08 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | D115606 | 1,5-Dihydroxynaphthalene 97% | 83-56-7 | 500G | ₹14007.55 | 2022-06-14 | Buy |
| TCI Chemicals (India) | D0590 | 1,5-Dihydroxynaphthalene min. 98.0 % | 83-56-7 | 25G | ₹1800 | 2022-05-26 | Buy |
| TCI Chemicals (India) | D0590 | 1,5-Dihydroxynaphthalene min. 98.0 % | 83-56-7 | 100G | ₹3600 | 2022-05-26 | Buy |
| TCI Chemicals (India) | D0590 | 1,5-Dihydroxynaphthalene min. 98.0 % | 83-56-7 | 500G | ₹12200 | 2022-05-26 | Buy |
1,5-Dihydroxy naphthalene Chemical Properties,Uses,Production
Chemical Properties
Grey powder 1,5-Naphthalenediol [83-56-7], 1,5-dihydroxynaphthalene, Azurol, C10H8O2, Mr 160.16, forms colorless needles (from aqueous methyl cellosolve). The compound is sublimable, readily soluble in ether and acetone, but only sparingly soluble in water and hydrocarbons. It is oxidized to 5-hydroxy-1,4-naphthoquinone ( juglone) by CrO3. Amination gives 1,5-naphthalenediamine; coupling with diazotized anilines occurs in the 2- or 4-position.
Uses
1,5-Dihydroxynaphthalene is an intermediate of synthetic mordant azo dyes. It is an intermediate used in organic synthesis, pharmaceuticals, dyestuff fields and photograph industry. It is used as a coupling component in azo dyes as exemplified in the metallizable (Cr) wool dye, C.I. Mordant Black 9.
Production Methods
The sodium salt of naphthalene-1,5-disulfonic acid is added gradually to excess 75 % sodium hydroxide. The mixture is heated under pressure to 276℃ over the course of 7 h and the reaction is completed by heating for a further 5 h at this temperature. After precipitation with sulfuric acid, the product is isolated in 90 % yield.
Purification Methods
The diol (~30g) is purified by making into a thick paste with H2O and suspending this in 3L of H2O containing 200mL of EtOH, boiling under reflux for 3hours, cooling to 30o, saturating with SO2, digesting below the boiling point for 1hour and filtering fast through a large hot filter paper. The hot filtrate is poured onto crushed ice whereby the diol (15-20g) separates as colourless needles (m 258o) [Wheeler & Ergle J Am Chem Soc 52 4873 1930]. Recrystallise it from H2O or nitromethane under N2 to avoid oxidation. The dibenzoyl derivative has m 245o (from EtOH). The 5-methoxy-1-naphthol derivative [prepared from the diol in MeOH/HCl (1:30 weight to volume ratio) and set aside at 25o for 9-10days] crystallised from pet ether (m 135-136o) or from CH2Cl2/hexane (needles m 140o) [Bell & McCaffrey Aust J Chem 46 731 1993]. [Beilstein 6 I 477, 6 II 950, 6 III 5265, 6 IV 6554.]
1,5-Dihydroxy naphthalene Preparation Products And Raw materials
Raw materials
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chevron_right| Supplier | Tel | Country | ProdList | Advantage | Inquiry |
|---|---|---|---|---|---|
| SNECOFRi Pvt Ltd | +91-9032850129 +91-9032850129 | Telangana, India | 404 | 58 | Inquiry |
| Prolife Bio Chemical Industries Pvt Ltd | +91-9825114995 +91-9825114995 | Gujarat, India | 74 | 58 | Inquiry |
| LANXESS India Pvt. Ltd. | +91-8356878763 +91-8356878763 | Maharashtra, India | 190 | 58 | Inquiry |
| Santel Industries | +91-7940075559 +91-7926401417 | Gujarat, India | 98 | 58 | Inquiry |
| CHEMSWORTH | +91-261-2397244 | New Delhi, India | 6707 | 30 | Inquiry |
| TCI Chemicals (India) Pvt. Ltd. | 1800 425 7889 | New Delhi, India | 6778 | 58 | Inquiry |
| CLEARSYNTH LABS LTD. | +91-22-45045900 | Hyderabad, India | 6351 | 58 | Inquiry |
| A.J Chemicals | 91-9810153283 | New Delhi, India | 6124 | 58 | Inquiry |
| Central Drug House(P) Ltd. | 91-11-49404040 | New Delhi, India | 6160 | 58 | Inquiry |
| Triveni chemicals | 08048762458 | New Delhi, India | 6093 | 58 | Inquiry |
| Supplier | Advantage |
|---|---|
| SNECOFRi Pvt Ltd | 58 |
| Prolife Bio Chemical Industries Pvt Ltd | 58 |
| LANXESS India Pvt. Ltd. | 58 |
| Santel Industries | 58 |
| CHEMSWORTH | 30 |
| TCI Chemicals (India) Pvt. Ltd. | 58 |
| CLEARSYNTH LABS LTD. | 58 |
| A.J Chemicals | 58 |
| Central Drug House(P) Ltd. | 58 |
| Triveni chemicals | 58 |
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